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Science unit 2 test
| Answer | Question |
|---|---|
| Density | The mass per cubic volume of a substance |
| Physical property | A characteristic of a material that can be observed without changing the identity of the material |
| Mass | The amount of matter in an object |
| Matter | Anything that has mass and takes up space |
| Liquid | A state of matter with a definite volume but no definite shape |
| Solid | A state of matter with a definite shape and volume |
| Weight | The gravitational pull on an object |
| Volume | The amount of space an object occupies |
| Gas | A state of matter that does not have a definite volume or a definite shape |
| Solubility | The ability of one material to dissolve in another |
| Flammability | The ability to burn easily |
| Chemical property | A characteristic of a material that can be observed as the material reacts with or changes into a different substance |
| Physical change | A change in matter in which no new substance is formed |
| Chemical change | A change in matter that produces one or more new substances |
| Solubility is the ability to dissolve into a solvent. | What is solubility? |
| Mass and Space | Which properties must matter have? |
| Reactivity, ripping, rotting, and flammability | Which abilities illustrate a chemical property of matter? |
| It changes states to gas | What happens when a liquid reaches its boiling point? |
| Fixed mass, definite volume, definite shape | Describe what identifies a solid. |
| Physical ice to liquid and the freezing | What type of change can be reversed? Give an example. |
| Heavily packed —> ice freezer molecules —-> liquid | Describe the difference in energy between an ice cube and liquid water. |
| Magnetism, use of a magnet | Which method could you use to separate a mixture of iron filings and sand? |
| Burning wood | Give examples of a chemical change. |
| Matter can neither be created nor destroyed | What does the Law of Conservation of Mass state? |
| The log burns and turns into ash AND CO2 gas. Mass of log before = log after + CO2 | After a log is burned, the mass of the ashes will be less than the mass of the log before it was burned. Explain. |
| Liquid | Which state of matter has a definite volume but not a definite shape? |
| Mass the same; weight dependent on gravity | If you could go to the Moon, would your weight on the Moon be the same as on Earth? How about your mass? Explain. |
| Mass/Volume | What is the mathematical formula to calculate density? |
| Physical; ingredients mix -Solubility -Physical change -Separation of matter | You make lemonade by mixing lemon juice, sugar, and water. Is this a physical change or a chemical change? Explain. Use and define all of the science terminology from this chapter that applies. |
| Chemical change. New substance formed | Is photosynthesis a chemical or physical change? Explain. |