Science Class: Physical and Chemical Changes
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Questions and Answers

Which of the following is an example of a physical change?

  • Brushing your hair (correct)
  • Iron rusting
  • Fireworks exploding
  • Digesting your lunch

    • What type of change occurs when a nail rusts?

  • A physical change where the phase changes
  • A chemical change where molecules are rearranged, forming a new substance (correct)
  • A physical change that only alters the appearance
  • A chemical change that reverses easily

    • Which process is classified as a chemical change?

  • A solid forming in a liquid
  • Formation of small solid particles from powder (correct)
  • Melting ice
  • Cutting paper

    • If you cut a piece of paper, what type of change is it?

    <p>A physical change, as it only changes the size and shape of the paper</p> Signup and view all the answers

    Which of the following observations most likely indicates that a chemical change has occurred?

    <p>Bubbles are formed</p> Signup and view all the answers

    Where is the genetic material located in an animal cell?

    <p>Nucleus</p> Signup and view all the answers

    Which organelles are responsible for digesting waste and food particles?

    <p>Lysosomes</p> Signup and view all the answers

    Which organelle is responsible for synthesizing proteins?

    <p>Ribosomes</p> Signup and view all the answers

    Which of the following is NOT typically found in a prokaryotic cell?

    <p>Endoplasmic Reticulum</p> Signup and view all the answers

    What is the primary function of a cell wall?

    <p>To protect and provide support</p> Signup and view all the answers

    Which organelle converts light energy into sugars during photosynthesis?

    <p>Chloroplasts</p> Signup and view all the answers

    Which structure aids in cellular movement, specifically swimming?

    <p>Flagella</p> Signup and view all the answers

    In a prokaryotic cell, where is the DNA primarily located?

    <p>Both (b) and (c)</p> Signup and view all the answers

    What is the term for a liquid changing into a solid?

    <p>Freezing</p> Signup and view all the answers

    Which of these describes the change of a gas into a liquid?

    <p>Condensation</p> Signup and view all the answers

    Which of these is NOT a physical change?

    <p>Burning wood</p> Signup and view all the answers

    What is considered the smallest unit of matter?

    <p>An atom</p> Signup and view all the answers

    How do particles move in a substance as it is heated?

    <p>They move faster</p> Signup and view all the answers

    A substance's boiling point is an example of what?

    <p>A physical property</p> Signup and view all the answers

    Which term describes a substance's ability to be stretched into a thin wire?

    <p>Ductility</p> Signup and view all the answers

    What describes a chemical change?

    <p>A change that produces a new substance</p> Signup and view all the answers

    What property measures a fluid's resistance to flow?

    <p>Viscosity</p> Signup and view all the answers

    Which of these measures how much matter is in a volume?

    <p>Density</p> Signup and view all the answers

    Which is an example of a chemical property?

    <p>Reactivity with water</p> Signup and view all the answers

    Which of these is an example of a physical change?

    <p>Sugar dissolving in water</p> Signup and view all the answers

    Which of these represents a physical property?

    <p>Conductivity</p> Signup and view all the answers

    A metal's ability to react with oxygen to form rust is what type of property?

    <p>Chemical property</p> Signup and view all the answers

    Which of the following is a chemical change?

    <p>Milk souring</p> Signup and view all the answers

    What is the term for the new organisms produced by living things?

    <p>Offspring</p> Signup and view all the answers

    What structure within the cell is responsible for carrying genetic information from the nucleus to the cytoplasm?

    <p>RNA</p> Signup and view all the answers

    What is the correct pairing for Adenine in a DNA molecule?

    <p>Thymine</p> Signup and view all the answers

    If one side of a DNA molecule has the sequence ACGTTGACT, what is the sequence of the other side?

    <p>TGCAACTGA</p> Signup and view all the answers

    What are the fine threads of DNA found in the nucleus called?

    <p>Chromatin</p> Signup and view all the answers

    What are the new cells formed by cell division called?

    <p>Daughter cells</p> Signup and view all the answers

    What type of reproduction requires only one parent?

    <p>Asexual reproduction</p> Signup and view all the answers

    What is the repeating molecular unit that forms a DNA molecule?

    <p>Nucleotide</p> Signup and view all the answers

    Which of the following correctly lists the three stages of the cell cycle in order?

    <p>Interphase, cytokinesis, and mitosis</p> Signup and view all the answers

    What structure anchors the spindle fibers in an animal cell during mitosis?

    <p>Centrioles</p> Signup and view all the answers

    Which of the following is an example of a qualitative observation?

    <p>The substance is a vibrant green</p> Signup and view all the answers

    What is the term for the process of cell division in which two identical daughter cells are formed?

    <p>Mitosis</p> Signup and view all the answers

    What is the term for the amount of space an object occupies?

    <p>Volume</p> Signup and view all the answers

    What are the small structures comprised of RNA and proteins found in the cytoplasm and on the endoplasmic reticulum?

    <p>Ribosomes</p> Signup and view all the answers

    What type of change occurs when wood burns to form ash and smoke?

    <p>Chemical change</p> Signup and view all the answers

    What is the region in prokaryotic cells where genetic material is found?

    <p>Nucleoid</p> Signup and view all the answers

    Which organelle is the site of energy transformation in eukaryotic cells?

    <p>Mitochondria</p> Signup and view all the answers

    Which of these is a physical property of a substance?

    <p>Hardness</p> Signup and view all the answers

    Which of the following best describes the reproduction of molds?

    <p>Sporulation</p> Signup and view all the answers

    Which structure is responsible for protein synthesis in prokaryotic cells?

    <p>Ribosomes</p> Signup and view all the answers

    What is the process called when a liquid changes to a gas?

    <p>Boiling</p> Signup and view all the answers

    Which of the following describes a substance's ability to dissolve in another substance ?

    <p>Solubility</p> Signup and view all the answers

    What is the protective outer layer found in some prokaryotic cells for survival in harsh environments called?

    <p>Slime capsule</p> Signup and view all the answers

    What is the jelly-like substance enclosed by a cell membrane called?

    <p>Cytoplasm</p> Signup and view all the answers

    What type of change is the melting of ice into water?

    <p>Physical change</p> Signup and view all the answers

    Which of the following best describes how cancer develops?

    <p>Body cells or mutated cells reproduce uncontrollably.</p> Signup and view all the answers

    Which structure is used for movement in many prokaryotic cells?

    <p>Flagella</p> Signup and view all the answers

    Which of the following is a chemical property?

    <p>Flammability</p> Signup and view all the answers

    What is the relationship between the cells in the human body that perform different functions?

    <p>Cells perform different functions of life.</p> Signup and view all the answers

    What is the process of asexual reproduction in prokaryotic cells?

    <p>Binary fission</p> Signup and view all the answers

    Cutting a piece of paper into smaller pieces is an example of what kind of change?

    <p>Physical change</p> Signup and view all the answers

    Which sequence accurately depicts the organization of an organism?

    <p>Cells, tissues, organs, organ systems, organism.</p> Signup and view all the answers

    What are the building blocks of DNA called?

    <p>Nucleotides</p> Signup and view all the answers

    Which of the following describes the shape of a DNA molecule?

    <p>Double helix</p> Signup and view all the answers

    Which of the following is NOT a component of modern cell theory?

    <p>The activity of an organism does not depend on its cells.</p> Signup and view all the answers

    Which observation is quantitative?

    <p>The object has a mass of 15 grams</p> Signup and view all the answers

    What is a segment of DNA that codes for a specific protein called?

    <p>Gene</p> Signup and view all the answers

    Which asexual reproduction method involves a parent producing a smaller version of itself, which may detach or stay attached forming a colony?

    <p>Budding</p> Signup and view all the answers

    What is the term for the physical property associated with a substance's shininess?

    <p>Luster</p> Signup and view all the answers

    What is the process of copying DNA before cell division called?

    <p>Replication</p> Signup and view all the answers

    What change occurs when water freezes into ice?

    <p>Physical change</p> Signup and view all the answers

    Which asexual reproduction method do ferns primarily utilize?

    <p>Spores</p> Signup and view all the answers

    In which phase of mitosis do chromosomes line up in the middle of the cell?

    <p>Metaphase</p> Signup and view all the answers

    Which change results in the formation of new substances?

    <p>Chemical change</p> Signup and view all the answers

    Which of the following is NOT a disadvantage of asexual reproduction?

    <p>Only one organism is needed</p> Signup and view all the answers

    What is the division of the cytoplasm at the end of mitosis called?

    <p>Cytokinesis</p> Signup and view all the answers

    What is the term when pollen lands on the stigma of a flower from a different plant?

    <p>Cross-Pollination</p> Signup and view all the answers

    What does the term 'reactivity' refer to regarding a substance?

    <p>Its ability to undergo a chemical reaction</p> Signup and view all the answers

    What is the term for a type of asexual reproduction where an organism breaks into fragments, and each fragment can grow into a new organism?

    <p>Fragmentation</p> Signup and view all the answers

    In the human body, where does fertilization primarily take place?

    <p>Fallopian Tube</p> Signup and view all the answers

    Which of these is a result of a chemical change?

    <p>Rusting iron</p> Signup and view all the answers

    What is the name given to the process by which male and female gametes combine?

    <p>Fertilization</p> Signup and view all the answers

    Which organelle is primarily responsible for producing energy in the form of ATP?

    <p>Mitochondria</p> Signup and view all the answers

    What is the primary function of ribosomes in a cell?

    <p>Synthesizing proteins</p> Signup and view all the answers

    What is the name for a fertilized egg formed after the fusion of gametes?

    <p>Zygote</p> Signup and view all the answers

    What process reduces the chromosome number by half in sexual reproduction?

    <p>Meiosis</p> Signup and view all the answers

    Which organelle is responsible for modifying, sorting, and packaging proteins for secretion?

    <p>Golgi apparatus</p> Signup and view all the answers

    Which of the following is NOT considered a physical property of matter?

    <p>Corrosion</p> Signup and view all the answers

    What property defines a substance's ability to dissolve in another substance?

    <p>Dissolve in another substance</p> Signup and view all the answers

    What is the primary function of mitochondria within a cell?

    <p>Energy production (ATP)</p> Signup and view all the answers

    Following photosynthesis, where does sugar primarily go within the cell?

    <p>Mitochondria for energy conversion</p> Signup and view all the answers

    Why are plant cell vacuoles typically larger than those in animal cells?

    <p>To store more water due to their immobility</p> Signup and view all the answers

    Which of the following is a key difference between DNA and RNA?

    <p>DNA contains deoxyribose while RNA contains ribose</p> Signup and view all the answers

    What is the primary function of the cell during interphase?

    <p>DNA replication and cell growth</p> Signup and view all the answers

    Why do spinal cord and brain injuries often not heal effectively?

    <p>These cells never enter mitosis and are stuck in interphase.</p> Signup and view all the answers

    What does the concept of 'nature vs. nurture' in the context of offspring refer to?

    <p>The impact of genes vs. the environment on development</p> Signup and view all the answers

    Which of the following is NOT a typical method of plant pollination?

    <p>Humans</p> Signup and view all the answers

    What is the primary result of crossing over during meiosis?

    <p>Increased genetic variation.</p> Signup and view all the answers

    In a lab setting, what is the first action to take if you get a chemical in your eye?

    <p>Flush the eye with water at the eyewash station</p> Signup and view all the answers

    What is the most important reason for knowing the location of the fire extinguisher and first aid kit in a laboratory?

    <p>To ensure that their location is known in case of emergencies</p> Signup and view all the answers

    What are the three main subatomic particles found in an atom?

    <p>Protons, neutrons, and electrons</p> Signup and view all the answers

    Which type of mixture is classified as having large particles that settle out after being left undisturbed?

    <p>Suspension</p> Signup and view all the answers

    Study Notes

    Biology Multiple Choice

    • Cell Structure: Genetic material (DNA) in an animal cell is found in the nucleus.

    • Waste Digestion: Lysosomes are organelles that digest waste and food particles.

    • Protein Production: Ribosomes synthesize proteins.

    • Prokaryotic Organelles: Prokaryotic cells lack an endoplasmic reticulum.

    • Cell Wall Function: The primary function of a cell wall is to provide support and protection.

    • Photosynthesis: Chloroplasts are responsible for converting light energy into sugars during photosynthesis.

    • Cell Movement: Flagella are used for cell movement (swimming).

    • Prokaryotic DNA Location: Prokaryotic DNA is located in the nucleoid region, and sometimes plasmids.

    • Cell Identification (from image): The best answer for an image will depend on visual features in the image. There's no image provided to determine the cell type.

    • Photosynthesis Pigment: Chlorophyll is the green pigment that absorbs sunlight in photosynthesis.

    • Gamete Production: Meiosis is the process of producing gametes (sperm and eggs).

    • Sexual Reproduction: Fertilization occurs when gametes combine from two parents.

    • Genetic Material: Chromosomes carry genetic material (DNA).

    • Body Cell Production: Mitosis generates new body cells.

    • Plant Fertilization: Plant fertilization can occur via wind, water currents, or animals.

    • Meiosis Product: Meiosis produces reproductive cells (gametes) like sperm.

    • Sexual Reproduction Benefits: Sexual reproduction increases genetic variation.

    • Spontaneous Generation: Spontaneous generation proposes that living things arise from non-living matter. It is incorrect.

    • Reproduction Definition: Reproduction involves forming offspring and making new cells.

    • Offspring Description: Offspring are new organisms produced by living things.

    • Cell Reproduction: Cells reproduce via cell division.

    • DNA Structure: Chromatin is a collection of DNA threads. The repeating units are nucleotides.

    • DNA Base Pairing: Adenine pairs with thymine, and cytosine pairs with guanine.

    • DNA Structure (sides): The side of the DNA ladder consists of sugar and phosphate.

    • RNA Function: RNA carries genetic information from the nucleus to the cytoplasm to build proteins.

    • DNA Base Sequence: If one strand has ACGTTGACT, the complementary strand is TGCAACTGA.

    • Cell Cycle Stages: The stages of the cell cycle are interphase, mitosis, and cytokinesis.

    • Mitosis Prophase Event: Centromeres do not pull apart during prophase.

    • Cell Cycle Differences (plants and animals): Plant cells have cell plate formation during cytokinesis.

    • Mitosis Spindle Fiber Anchor: Centrioles anchor spindle fibers in animal cells during mitosis.

    • Cell Division Calculation: If a cell divides every hour, after 8 hours there would be 256 cells (2^8).

    • Amoeba Reproduction: Amoebas reproduce by mitotic cell division.

    • Binary Fission Result: Binary fission produces two daughter cells that are equal in size and shape.

    • Budding Example: Yeast reproduces through budding.

    • Budding Cell Sizes: Budding results in two cells of different sizes.

    • Mold Reproduction: Mold reproduction involves spores.

    • Regeneration Capability: Some animals can regenerate lost body parts.

    • Human Regeneration: Human regeneration is limited to specific tissues.

    • Ribosome Structure: Ribosomes are composed of RNA and proteins.

    • Mitosis Spindle Apparatus Aid: Centrioles work with the spindle apparatus in mitosis.

    • Ribosome Production Site: Ribosomes are made in the nucleolus.

    • Cell Movement Structures: Cilia aid in cell movement.

    • Cytoplasm Definition: The cytoplasm is the fluid-filled region of the cell.

    • Energy Production Organelle: Mitochondria produce ATP (energy) in eukaryotic cells.

    • Waste Breakdown Organelle: Lysosomes break down waste material and cell parts.

    • Cell Support Structures: Both microfilaments and microtubules provide cell structure and support.

    • Prokaryotic Cell Definition: A prokaryotic cell is a unicellular organism lacking a nucleus.

    • Binary Fission Example: Bacteria reproduce via binary fission.

    • Mold Reproduction Method: Sporulation is the mold reproduction method.

    • Mold Energy Source: Molds get energy from the food they grow on.

    • Mold Reproductive Cells: Mold reproductive cells are spores.

    • Plant Asexual Reproduction: Plant asexual reproduction can involve runners (layering).

    • Plant Reproduction Methods: Plants can reproduce both sexually (with flowers) and asexually (runners/layering).

    • Asexual Reproduction Disadvantages: Asexual reproduction disadvantages include limited genetic variation and potential harm from disease or environmental changes.

    • Plant Cross-Pollination: Cross-pollination is when pollen from one plant lands on another plant's stigma.

    • Human Fertilization Site: Fertilization in humans occurs in the fallopian tube.

    • Meiosis Diagram Phase (1): Meiosis diagram with tetrads and chiasmata indicates prophase I.

    • Meiosis Diagram Phase (2): Meiosis diagram with sister chromatids lining up indicates metaphase II.

    • Flower Pistil: The pistil is the female part of the flower (stigma, style, ovule).

    • Plant Sexual Reproduction Requirement: For sexual reproduction, a plant creates a seed.

    • Human Fertilization Process: The process of human fertilization involves sperm breaking down the egg's membrane, fusion of membranes, hardening of egg membrane to prevent polyspermy, and combination of egg and sperm nuclei to form a zygote.

    • Cellular Energy Production: Mitochondria produce ATP for cellular energy.

    • Protein Synthesis: Ribosomes' primary function is protein synthesis.

    • Protein Modification: The Golgi apparatus modifies, sorts, and packages proteins.

    Chemistry Multiple Choice

    • Physical Property Example: Corrosion is a chemical property, not a physical one.
    • Pure Substance Classification: A substance containing carbon and oxygen is most likely a compound.
    • Nuclear Component Absence: Electrons are not found in the nucleus of an atom.
    • Matter Definition: Matter is anything that has mass and takes up space.
    • Malleability: The ability to be hammered into thin sheets is malleability.
    • Definite Shape/Volume (State of Matter): Solids have a definite shape and volume.
    • Mass Definition: Mass is a measure of the amount of matter in an object
    • Volume Definition: Volume is the amount of space an object occupies.
    • State Change Classification: A change in state of matter is a physical change.
    • Chemical Property Example: Reactivity with oxygen is a chemical property.
    • Matter Density: Density describes the amount of matter packed into a given volume.
    • Gas Characteristics: Gases do not have a definite shape.
    • Solubility Definition: Solubility is the ability of a substance to dissolve in another.
    • Conductivity Definition: Conductivity is the ability to conduct heat or electricity.
    • Liquid Particle Arrangement: Liquid particles are close together but can flow past each other.
    • Boiling Point Transition: Water boils when it changes from a liquid to a gas.
    • Melting Point Transition: Metals melt when they change from a solid to a liquid.
    • Ductility Definition: Ductility is the ability to be drawn into wires.
    • Chemical Change Example: Iron rusting is an example of a chemical change, not a physical change.
    • Physical Property Example: Boiling point is a physical property.
    • Liquid to Solid Change: Liquid changing into a solid is called freezing.
    • Gas to Liquid Change: Changing a gas into a liquid is called condensation.
    • Not a Physical Change: Burning wood is a chemical change, not a physical change.
    • Smallest Unit of Matter: The smallest unit of matter is an atom.
    • Particle Movement with Heat: Particles move faster when heated.
    • Boiling Point Classification: Boiling point is a physical property.
    • Stretching Ability: The ability to be stretched is elasticity, not ductility.
    • Chemical Change Definition: A chemical change produces a new substance.
    • Viscosity Definition: Viscosity is the resistance of a fluid to flow.
    • Density Definition: Density is the amount of matter in a given volume.
    • Chemical Property Example (in water): Water reacting with sodium is a chemical property.
    • Qualitative vs. Quantitative: Boiling point, mass, are quantitative. Color, density, smell are qualitative.
    • Qualitative/Quantitative Observation Example: "The liquid is blue" is qualitative; "The liquid has a mass of 50 grams" is quantitative.
    • Physical Property: The property associated with the shininess of a substance is luster.

    Biology Fill in the Blank

    • Cell Theory Principles: All living things are made of cells, cells are the basic unit of structure and function, and cells come from pre-existing cells.
    • Cell Structure Detail: The nucleus contains the genetic material (DNA) of eukaryotic cells, with the cell membrane acting as a protective barrier, mitochondria providing energy, ribosomes synthesizing proteins (in the cytoplasm or on the rough endoplasmic reticulum), and vacuoles storing water, nutrients, and waste (larger in plant cells). The cell wall (plant cells only) adds support and protection. Lysosomes break down cellular waste.
    • Prokaryotic Cell Structure: Prokaryotic cells lack a nucleus, instead the genetic material (DNA) is contained within a nucleoid. The ribosomes in prokaryotic cells are smaller. Protection from harsh environments might be provided by a slime capsule. Movement may have flagella.. Prokaryotes reproduce asexually via binary fission.
    • DNA Components: DNA's monomers are nucleotides, made of phosphate, sugar (deoxyribose), and nitrogenous bases (A, T, C, G).
    • DNA Structure Detail: DNA forms a double helix, where bases pair (A with T, C with G), held together by hydrogen bonds with a sugar-phosphate backbone.
    • Cell Cycle Components: The cell cycle includes interphase (growth, DNA replication), mitosis (chromosome separation), and cytokinesis.
    • Mitosis Phases: Prophase (chromosomes condense), metaphase (chromosomes line up), anaphase (sister chromatids separate), telophase (new nuclei form), and cytokinesis (division of cytoplasm).
    • Cytokinesis Differences (plants and animals): Plant cells form a cell plate, while animal cells pinch in half.
    • Mitosis Chromosome Separators: Centrioles and spindle fibers guide chromosome movement during mitosis.
    • Asexual Reproduction Types: Binary fission in unicellular organisms, budding, fragmentation, and vegetative reproduction (in plants).
    • Sexual Reproduction Components: Sexual reproduction involves fusion of gametes and produces genetically diverse offspring, with male gametes called sperm and female gametes called egg. The fusion of gametes is called fertilization, this creates a zygote, and meiosis is the cell division that creates gametes.
    • Meiosis Stages and Result: Meiosis proceeds through phases with homologous chromosomes separating during meiosis I. The resulting cells in meiosis II are haploid. Crossing over between homologous chromosomes during prophase I is critical for genetic variation.
    • Flower Structure: The pistil is the female part of the flower, consisting of the stigma, style, and ovary, while the stamen are the male parts of the flower with anther and filament.

    Chemistry Fill in the Blank

    • Matter Definition: Matter has mass and occupies space.
    • States of Matter: The three states are solid, liquid, and gas.
    • Solid Characteristics: Solids have a definite shape and volume.
    • Liquid Characteristics: Liquids have a definite volume but take the shape of their container.
    • Gas Characteristics: Gases don't have a definite shape or volume.
    • Mass Definition: Mass is the amount of matter in an object.
    • Volume Definition: Volume is the amount of space an object takes up.

    Short Answer Biology

    • Mitochondria in Muscle Cells: Muscle cells need more mitochondria to produce sufficient energy for muscle movement.

    • Sugar Transport: Sugar will enter mitochondria for energy usage, or a vacuole for storage depending on need.


    • Plant Cell Vacuoles: Plant vacuoles are larger for water storage due to the plant's immobile nature.

    • RNA vs. DNA: DNA is double-stranded, uses A-T and C-G base pairs, uses deoxyribose sugar. RNA is single-stranded, uses A-U and C-G, and uses ribose sugar, with varieties like mRNA, tRNA, and rRNA.

    • Interphase Activities: Interphase involves cell growth, DNA and organelle replication, protein synthesis, and ongoing cellular functions.

    • Nerve Cell Repair: Spinal cord and brain injuries don't heal because nerve cells often get stuck in the interphase portion of the cycle.

    • Plant Pollination: Wind, water, and insects (seeking nectar) are common plant pollination methods, with animals also playing a role.

    • Crossing Over: Crossing over is the exchange of genetic material between homologous chromosomes during prophase I of meiosis, which is crucial for genetic variation( diversity).

    Short Answer Chemistry

    • Chemical Exposure: If a chemical is in your eye, immediately flush the eye with water from the eyewash station or equivalent safety measure. Notify the teacher/instructor.

    • Safety Equipment: Know the locations of fire extinguishers, first aid kits, eyewash stations.

    • Atom Parts and Charges: Atoms have protons (positive, in the nucleus), neutrons (neutral, in the nucleus), and electrons (negative, orbiting the nucleus).

    • Qualitative vs. Quantitative Data Examples: The examples are given across the different types of data, from data examples given across the different types of examples of data given.

    • Material Classifications: Classify each material by whether it is an element, compound, solution, colloid, suspension, or a mechanical mixture

    • Physical vs. Chemical Changes: A physical change affects matter's appearance but doesn't create a new substance; a chemical change produces a new substance.

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    Test your understanding of physical and chemical changes in this engaging quiz. Explore key concepts such as cell structures, types of changes, and the functions of various organelles. Perfect for science students looking to reinforce their knowledge.

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