Unit 3 Science Review

1. What is the term for the amount of space that something takes up?

• Matter
• Density
• Volume
• Temperature

2. What is the best description of what happens during a chemical reaction?

• A substance goes through a chemical change.
• The physical properties of a substance changed
• A new substance is formed during a chemical change
• the type of matter in the substance remains the same

3. What term is used to identify a mixture that has the same composition throughout?

• Liquid
• Element
• Solution
• Compound

4. Which term names a substance formed by two or more types of atoms that are chemically combined?

• Matter
• Mixture
• Solution
• Molecule

6. Which term or phrase best describes what happens when a tomato rots?

• Physical Change
• Chemical change
• Conservation of mass
• Formation of a compound

7.

• 3:gas
• 2:solid
• 1:liquid
• 2 :liquid

8.

• Liquid water boils a temperatures between 0 degrees Celsius and 100 degree Celsius
• Solid water melts, forming liquid water at temperatures below 0 degree Celsius
• Liquid water freezes, forming solid water, at temperatures greater than 0 degrees Celsius.
• Water vapor condenses into liquid water when temperatures drop below 100 degrees Celsius

9. There are different characteristics for each state of matter. Which statement describes a difference between liquid and Solids

• Temperature can change a solid to a liquid, but cannot change a liquid to a solid.
• Solids have definite volume and liquids do not have a definite volume
• The particles in the solid are much closer together that the particles in a liquid.
• Solids take on the shape of their containers and liquid maintain their own shapes.

10. A cup holds 125 grams of liquid water and 100 grams of ice. What is a reasonable mass from the water in the cup after the ice melts?

• 175 grams
• 215 grams
• 225 grams
• 230 grams

11. How does water changes as it evaporates?

• Its mass and volume decrease.
• It mass and volume increase.
• Its mass remain unchanged. Its volume increases.
• its mass increases. Its volume remains unchanged