Introduction to Physical Science

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What is matter?
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Matter is anything that has mass and takes up space.
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How are elements different from compounds?
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Elements are pure substances with one type of atom, while compounds consist of two or more elements chemically combined.
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What is the atomic number of an element?
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The atomic number is the number of protons in an atom's nucleus.
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What is the law of conservation of mass?
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It states that mass is neither created nor destroyed in a chemical reaction.
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What are the three main states of matter?
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The three main states of matter are solid, liquid, and gas.
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What is a chemical reaction?
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A chemical reaction is a process where substances transform into new substances with different properties.
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Why is water considered a universal solvent?
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Water can dissolve more substances than any other liquid due to its polar nature.
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What is the difference between a physical change and a chemical change?
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A physical change alters form, not identity, while a chemical change alters the substance's chemical structure.
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How does temperature affect the state of matter?
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Temperature changes can cause matter to change states, such as melting or freezing.
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What is a mixture?
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A mixture contains two or more substances physically combined but not chemically bonded.
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How is density calculated?
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Density is calculated by dividing mass by volume (Density = mass/volume).
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What is the boiling point of water at sea level?
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The boiling point of water at sea level is 100°C (212°F).
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What does pH measure?
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pH measures the acidity or basicity of a solution.
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What is an atom?
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An atom is the smallest unit of an element that retains its chemical properties.
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What is energy?
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Energy is the capacity to do work or produce heat.
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