Science Quiz: Physical vs Chemical Changes
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Questions and Answers

What is the primary role of the small intestine in digestion?

  • Filtration of air
  • Absorption of water and minerals
  • Storage of waste material
  • Absorption of nutrients into the bloodstream (correct)

    • Which nutrient is primarily absorbed by the large intestine?

  • Fats
  • Vitamins
  • Water (correct)
  • Amino acids

    • During which phase of mitosis do chromosomes align at the metaphase plate?

  • Metaphase (correct)
  • Anaphase
  • Telophase
  • Prophase

    • What is the main function of alveoli in the respiratory system?

    <p>To facilitate gas exchange (C)</p> Signup and view all the answers

    What is the primary difference between veins and arteries in terms of blood flow?

    <p>Veins take blood to the heart; arteries take blood away from the heart. (C)</p> Signup and view all the answers

    What characterizes cancer cells compared to normal cells?

    <p>They divide uncontrollably and can invade tissues. (A)</p> Signup and view all the answers

    What is a tumor?

    <p>A mass of abnormal cells that can be benign or malignant (D)</p> Signup and view all the answers

    What is the primary function of mitochondria in a cell?

    <p>Generate energy in the form of ATP (B)</p> Signup and view all the answers

    Which structure provides structural support and protection specifically in plant cells?

    <p>Cell wall (D)</p> Signup and view all the answers

    What is the main role of stem cells in the body?

    <p>To differentiate into various cell types (B)</p> Signup and view all the answers

    What is the function of chloroplasts in plant cells?

    <p>Capture sunlight for photosynthesis (A)</p> Signup and view all the answers

    Which of the following is NOT one of the three parts of the cell theory?

    <p>Cells are capable of spontaneous generation (C)</p> Signup and view all the answers

    What is the function of vacuoles in plant cells?

    <p>Store water, nutrients, and waste (A)</p> Signup and view all the answers

    Which stage of the digestive process involves the breakdown of food?

    <p>Digestion (D)</p> Signup and view all the answers

    What is primarily absorbed by the small intestine during digestion?

    <p>Nutrients from digested food (D)</p> Signup and view all the answers

    Which organelle acts as the jelly-like substance that supports the cell's structure and allows chemical reactions to occur?

    <p>Cytoplasm (B)</p> Signup and view all the answers

    What is a key characteristic that distinguishes a chemical change from a physical change?

    <p>Chemical changes result in new substances. (B)</p> Signup and view all the answers

    Which step should be taken first when balancing a chemical equation?

    <p>Write the unbalanced equation. (C)</p> Signup and view all the answers

    When balancing the equation $H_2 + O_2 → H_2O$, how many hydrogen atoms are needed on the right side to balance the equation correctly?

    <p>4 (A)</p> Signup and view all the answers

    Which element is typically balanced last when balancing chemical equations?

    <p>Oxygen (D)</p> Signup and view all the answers

    In the equation $2H_2 + O_2 → 2H_2O$, how many total oxygen atoms are on the left side?

    <p>2 (D)</p> Signup and view all the answers

    Why is it advantageous to use diagrams like Bohr-Rutherford and Lewis Dot diagrams in chemistry?

    <p>They help visualize how atoms bond and structure molecules. (A)</p> Signup and view all the answers

    Which of the following is the correct balanced form of the skeleton equation $H_2 + O_2 → H_2O$?

    <p>$2H_2 + O_2 → 2H_2O$ (C)</p> Signup and view all the answers

    What is the primary purpose of balancing a chemical equation?

    <p>To make sure there is the same number of atoms on both sides of the equation. (B)</p> Signup and view all the answers

    What type of change is observed when ice melts into water?

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

    Which type of chemical reaction is represented by the equation 2H2 + O2 → 2H2O?

    <p>Synthesis (C)</p> Signup and view all the answers

    What does a skeleton equation represent?

    <p>An unbalanced reaction using chemical formulas. (C)</p> Signup and view all the answers

    Which type of electromagnetic radiation is ranked higher than blue light in the electromagnetic spectrum?

    <p>Gamma rays (C)</p> Signup and view all the answers

    Which equation is an example of a double displacement reaction?

    <p>Al + ZnCl2 → Zn + AlCl3 (A)</p> Signup and view all the answers

    What causes the bending appearance of a straw placed in water?

    <p>Refraction of light (D)</p> Signup and view all the answers

    What type of reaction is characterized by a substance reacting with oxygen to produce energy, along with carbon dioxide and water?

    <p>Combustion (B)</p> Signup and view all the answers

    Which of the following greenhouse gases is primarily released by livestock digestion?

    <p>Methane (CH₄) (B)</p> Signup and view all the answers

    What is the outcome of a decomposition reaction?

    <p>Two or more simpler substances result from a single compound. (D)</p> Signup and view all the answers

    Which statement about word equations is true?

    <p>They describe the substances involved without chemical formulas. (C)</p> Signup and view all the answers

    What is a primary consequence of the Enhanced Greenhouse Effect?

    <p>Increased greenhouse gas concentration (B)</p> Signup and view all the answers

    What is a key tip for solving chemistry problems effectively?

    <p>Read the question carefully to identify necessary actions. (B)</p> Signup and view all the answers

    Which component of the electromagnetic spectrum has the lowest energy?

    <p>Radio waves (C)</p> Signup and view all the answers

    What term refers to the long-term increase in Earth's average surface temperature due to human activities?

    <p>Global warming (C)</p> Signup and view all the answers

    Which of the following is not a greenhouse gas caused by human activities?

    <p>Argon (Ar) (A)</p> Signup and view all the answers

    Which of the following correctly describes the term climate change?

    <p>Broad changes in global or regional climate patterns (D)</p> Signup and view all the answers

    What does the normal line represent in the context of reflection?

    <p>An imaginary line that is perpendicular to the surface (D)</p> Signup and view all the answers

    If the angle of incidence is 40 degrees, what is the angle of reflection according to the law of reflection?

    <p>40 degrees (A)</p> Signup and view all the answers

    What type of image is always formed by a convex mirror?

    <p>Virtual and upright (A)</p> Signup and view all the answers

    When an object is placed between the focal point and a concave mirror, what characteristics describe the formed image?

    <p>Virtual, upright, and magnified (B)</p> Signup and view all the answers

    In the SALT description method, what does the 'S' stand for?

    <p>Size of the image (C)</p> Signup and view all the answers

    How does the position of an object beyond the focal point affect the image produced by a concave mirror?

    <p>It produces a real and inverted image (C)</p> Signup and view all the answers

    Which of the following is not a characteristic of the image formed by a convex mirror?

    <p>Larger than the object (D)</p> Signup and view all the answers

    Which characteristic does not describe an image formed by a concave mirror when the object is beyond the focal point?

    <p>Larger than the object (D)</p> Signup and view all the answers

    Study Notes

    Physical vs. Chemical Changes

    • Physical change: A change in appearance or state, but the substance remains the same. (e.g., melting ice: H₂O (solid) to H₂O (liquid))
    • Chemical change: A process where a new substance is formed, with a different chemical composition. (e.g., burning paper: creating ash and gases)

    Evidence of a Chemical Change

    • Change in color
    • Formation of a gas (bubbles or fizzing)
    • Change in temperature (release or absorb heat)
    • Change in smell (new odor produced)

    Atoms and Neutrons

    • Atoms are the smallest units of elements, consisting of protons, neutrons, and electrons.
    • To find the number of neutrons, subtract the atomic number (number of protons) from the atomic mass (rounded to the nearest whole number).
    • Example: Zinc (atomic number = 30, atomic mass = 65) has 35 neutrons (65 - 30 = 35).

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    Chemistry Exam Review PDF

    Description

    Test your knowledge on the differences between physical and chemical changes in matter. This quiz will also cover the evidence indicating a chemical change and details about atoms and neutrons. Enhance your understanding of basic chemistry concepts!

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