1) What is an element? a) - A substance made of two or more atoms b) - A pure substance made of only one kind of atom c) - A mixture of molecules 2) What is a compound? a) - A substance made of identical atoms b) - A substance made of two or more different elements chemically bonded together c) - A group of molecules loosely connected 3) What is a molecule? a) - A group of atoms held together by chemical bonds b) - A single atom with a charge c) - A mixture of compounds 4) Which of the following is a property of metals? a) - Brittle and dull b) - Shiny and malleable c) - Poor conductor of heat 5) Which of the following is a property of nonmetals? a) - Good conductor of electricity b) - Shiny and ductile c) - Dull and brittle 6) - What is true about ionic compounds? a) - Formed from nonmetals, low melting points b) - Formed from metals and nonmetals, high melting points c) - Do not conduct electricity 7) What is true about covalent compounds? a) - Form crystals and conduct electricity b) - Have high boiling points and exist as ions c) - Form molecules and do not conduct electricity 8) What is the difference between mass and weight? a) - Mass is affected by gravity; weight is not b) - Mass is the amount of matter; weight is the force of gravity on that mass c) - Mass changes on the Moon; weight stays the same 9) How can you find the volume of a regular solid a) - Use a graduated cylinder b) - Multiply length × width × height c) - Use the displacement method 10) Why is density considered a physical property? a) - It changes the substance’s identity b) - It involves chemical bonding c) - It can be measured without changing the substance 11) How does the density of solids compare to liquids and gases? a) - Solids are usually denser than both b) - Liquids are denser than solids c) - Gases are the most dense 12) - Why does the weight of an object change on the Moon but its mass does not? a) - Mass depends on location b) - Gravity is weaker on the Moon c) - The Moon has more matter 13) What is a physical property? a) - A trait that changes the substance b) - A characteristic observed without changing the substance c) - A chemical reaction 14) What is displacement in measuring volume? a) - Measuring air pressure b) - Measuring the amount of water moved c) - Measuring temperature change 15) What is pressure in gases? a) - The weight of the gas b) - The force of particles on container walls c) - The volume of the gas 16) Why does pressure inside a scuba tank decrease as air is used? a) - There are fewer particles inside b) - The tank expands c) - The temperature increases 17) Why does a tire with more air particles have greater pressure? a) - The tire becomes colder b) - More collisions with the walls c) - Less space inside 18) Who was Robert Boyle and what did he discover? a) - He discovered atoms b) - He discovered the periodic table c) - He discovered the inverse relationship between pressure and volume 19) What happens when more air is added to a tire? a) - The tire becomes softer b) - The pressure decreases c) - The tire becomes firmer and pressure increases 20) - Why do ionic compounds form crystals? a) - Because they are liquids b) - Because their ions arrange in a regular pattern c) - Because they are gases 21) A cube has a length of 4 cm, width of 4 cm, and height of 4 cm. Its mass is 128 g. What is its density? a) 2 g/cm³ b) -4 g/cm³ c) -8 g/cm³ 22) A stone is dropped into water, raising the level from 50 mL to 65 mL. Its mass is 45 g. What is its density? a) 2 g/mL b) 3 g/mL c) 4 g/mL 23) Two objects are the same size, but one floats and the other sinks. What does this tell you? a) - The floating object is denser b) - The sinking object is less dense c) - The floating object is less dense 24) - On a planet with stronger gravity than Earth, what happens to an object’s weight and mass? a) - Weight increases, mass stays the same b) - Mass increases, weight stays the same c) - Both weight and mass increase 25) What happens to pressure as a diver goes deeper underwater? a) - It decreases b) - It increases c) - It stays the same 26) - What happens inside a closed syringe when you push the plunger down? a) - Pressure increases b) - Pressure decreases c) - Volume increases 27) A substance is brittle, dull, and does not conduct electricity. What is it likely to be? a) - A metal b) - A nonmetal c) - An ionic compound

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