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Questions and Answers
What occurs in an open circuit?
What occurs in an open circuit?
- A light will be on
- A light will be off (correct)
- The current flows continuously
- The circuit is providing power
What is the primary purpose of an electrical switch?
What is the primary purpose of an electrical switch?
- To control the flow of electric current (correct)
- To transform electrical energy to mechanical energy
- To measure electric current
- To store electric energy
Which of the following best describes electric current?
Which of the following best describes electric current?
- A continuous flow of electric charges (correct)
- A measured flow of heat energy
- An intermittent flow of electric charges
- A static flow of electric charges
What energy source uses a chemical reaction to create an electric current?
What energy source uses a chemical reaction to create an electric current?
What role do antioxidants play in cellular health?
What role do antioxidants play in cellular health?
How many amino acids are commonly described in dietary proteins?
How many amino acids are commonly described in dietary proteins?
What is the definition of biomass energy?
What is the definition of biomass energy?
What happens to acidic solutions when litmus paper is introduced?
What happens to acidic solutions when litmus paper is introduced?
Which vitamins are considered dietary antioxidants?
Which vitamins are considered dietary antioxidants?
What is an aerosol?
What is an aerosol?
Which of the following is an example of a volatile compound?
Which of the following is an example of a volatile compound?
What is the pH range of an acidic solution?
What is the pH range of an acidic solution?
What distinguishes a suspension from other mixtures?
What distinguishes a suspension from other mixtures?
What is the main characteristic of a supersaturated solution?
What is the main characteristic of a supersaturated solution?
What role does temperature play in solubility?
What role does temperature play in solubility?
Which of these is a characteristic of a saturated solution?
Which of these is a characteristic of a saturated solution?
What is a pure substance?
What is a pure substance?
What is the neutral pH value on the pH scale?
What is the neutral pH value on the pH scale?
Which of the following is an emulsion?
Which of the following is an emulsion?
What does it mean to dissolve a substance?
What does it mean to dissolve a substance?
What is a characteristic of a dilute solution?
What is a characteristic of a dilute solution?
What does a basic solution do to red litmus paper?
What does a basic solution do to red litmus paper?
Which layer of the atmosphere is primarily characterized by horizontal jet streams?
Which layer of the atmosphere is primarily characterized by horizontal jet streams?
What does the lithosphere comprise?
What does the lithosphere comprise?
What is the definition of subduction?
What is the definition of subduction?
Which part of the Earth is defined as the biosphere?
Which part of the Earth is defined as the biosphere?
What occurs in a subduction zone?
What occurs in a subduction zone?
What is the primary characteristic of the troposphere?
What is the primary characteristic of the troposphere?
What is produced by a base in water?
What is produced by a base in water?
The atmosphere gradually fades away to which surrounding area?
The atmosphere gradually fades away to which surrounding area?
Flashcards
What is an electrical switch?
What is an electrical switch?
A device that controls the flow of electric current in a circuit. It can be used to turn a light on or off.
What is electric current?
What is electric current?
A continuous flow of electric charges moving along a path. It's what makes electrical devices work and is measured in amperes (A).
What is electrical energy?
What is electrical energy?
The form of energy that involves the flow of electric charges. Essentially, it's another term for electricity.
What is biomass energy?
What is biomass energy?
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What is a battery?
What is a battery?
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What are balanced forces?
What are balanced forces?
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What are vitamins?
What are vitamins?
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What are nutrients?
What are nutrients?
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What is ethanol?
What is ethanol?
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What are antioxidants?
What are antioxidants?
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Suspension
Suspension
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Solubility
Solubility
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Saturated Solution
Saturated Solution
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Supersaturated Solution
Supersaturated Solution
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Pure Substance
Pure Substance
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pH Scale
pH Scale
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Neutral pH
Neutral pH
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Dilute Solution
Dilute Solution
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Solution
Solution
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Base
Base
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Basic Solution
Basic Solution
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Emulsion
Emulsion
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Troposphere
Troposphere
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Dissolve
Dissolve
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Stratosphere
Stratosphere
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Lithosphere
Lithosphere
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Atmosphere
Atmosphere
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Biosphere
Biosphere
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Subduction
Subduction
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Subduction Zone
Subduction Zone
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Study Notes
Electrical Concepts
- Electrical switch: Controls the flow of electric current in a circuit. A closed circuit allows current flow, making a light turn on.
- Electric current: Continuous flow of electric charges along a pathway. Measured in amperes (A).
- Electrical energy: Another term for electricity, the flow of electric charges through a conductor.
- Biomass energy: Energy produced from burning plant or animal matter, creating steam to power turbines.
- Battery: An energy source that produces an electric current using chemical reactions.
- Balanced forces: Forces on an object sum to zero, resulting in no change in motion.
Materials at Home
- Vitamins: Organic compounds essential nutrients for organisms; obtained from diet, deficiency leads to illnesses.
- Nutrient: Molecules used by cells for energy and building structures. Nutrients are vital for metabolic processes.
- Ethanol: Flammable, colorless, slightly poisonous chemical compound; commonly known as alcohol.
- Antioxidant: Molecule that protects cells from oxidative damage by free radicals (unstable molecules). Examples include vitamins C, E, and K, and plant compounds like lycopene.
- Amino acid: Building block of proteins and enzymes; 20 amino acids found in proteins, some essential for the body.
- Acid: Sour-tasting, corrosive substance; opposite of a base; turns litmus red.
- Aerosol: Liquid or solid particles suspended in air or gas; also known as particulate matter.
- Volatile: Compounds with low melting temperatures, such as hydrogen, helium, water, ammonia, carbon dioxide, and methane.
- Acidic: Describes a solution with a pH value below 7. The lower the pH, the more acidic.
- Suspension: Cloudy mixture of solid/liquid clumps in a liquid/gas; for example, muddy water.
Solutions and Mixtures
- Supersaturated solution: Solution containing more solute than a saturated solution, usually achieved by changing temperature.
- Solute: Substance being dissolved in a solution.
- Solution: Homogeneous mixture of two or more substances, where the substances blend uniformly.
- Solubility: Ability of a substance (solute) to dissolve in another substance (solvent), influenced by temperature.
- Saturated solution: Contains the maximum amount of solute that can be dissolved in a given solvent at a specific temperature.
- Pure substance: Substance composed of only one kind of atomic particle. This results in consistent properties.
- pH scale: Measures the acidity (0-7) or basicity (7-14) of substances in solution. A pH of 7 is neutral.
- Neutral pH: Neither acidic nor basic, a pH reading of 7.
- Emulsion: Special suspension preventing separation of parts of a mixture. Example: homogenized milk.
- Dissolve: Mixing one substance (solute) with another (solvent) to form a solution.
- Dilute: A solution with a low concentration of solute.
- Basic: Describes a solution with a pH value above 7. Higher pH values indicate more basic properties.
Earth's Components
- Atmosphere: Layer of air surrounding the Earth. Thicker near the ground and gradually thins out into space.
- Biosphere: Region of Earth where living organisms are found, covering mountaintops to the ocean depths.
- Lithosphere: The crust and upper mantle of the Earth. It's made up of tectonic plates that float on the asthenosphere.
- Troposphere: Lowest part of the atmosphere where convection (circulation of air) is prominent, where most clouds occur.
- Stratosphere: Layer above the troposphere; usually stable with minimal vertical motions but can contain strong horizontal winds.
- Asthenosphere: Layer of ductile rocks beneath the lithosphere, allowing for plate movement in plate tectonics.
- Subduction: Process where one tectonic plate moves beneath another.
- Plate tectonics: Theory stating that the Earth's lithosphere is divided into plates moving on the asthenosphere.
- Crust: Outermost solid layer of Earth, including continental and oceanic crust.
- Subduction zone: Places where oceanic plates sink beneath continental plates due to high pressure.
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Description
Explore the fundamentals of electrical concepts such as current, switches, and energy production, alongside important nutrients and chemicals found in everyday materials. This quiz covers essential topics relevant to both electricity and home science. Test your knowledge and understanding of these key concepts!
