Answer:
HERES ALL THE TEST ANSWERS
Explanation:
Physical Properties
1-What happens when a substance undergoes a physical change?
<em>answer-Some physical properties change, but the substance keeps its identity.</em>
2-What is an example of a physical change?
<em>answer-ice forming and then melting back into water</em>
3-When liquid gold becomes a solid, its particles get closer together. Which best describes what happened to the gold?
<em>answer-the rearrangement of particles in a physical change</em>
4-Eugene describes the physical property of a material as “sweet and floral.” What physical property of the material is Eugene most likely observing?
<em>answer-odor </em>
5-Which can occur during physical change?
<em>answer-The particles can arrange in different ways.</em>
6-If there is 8 g of a substance before a physical change, how much will there be afterwards?
<em>answer- 8 grams</em>
7-Which statement about the physical change of liquid water boiling into steam is true?
<em>answer-the heat added represents an energy change </em>
8-Fifteen grams of a liquid plastic are frozen in a physical change that increases the volume. What can be known about the plastic after the change?
<em>answer- it will still weigh 15 grams</em>
9-Which statement best compares and contrasts two physical properties of matter?
<em>answer-Boiling points and melting points are similar because they both involve the change in a state of a material, but they are different because boiling point involves a change from a liquid to a gas and melting point involves a change from a solid to a liquid.</em>
10-Serena is mixing a material into a beaker filled with a liquid. She notices that the material seems to disappear into the liquid. What physical property of the material is Serena most likely observing?
<em>answer-solubility</em>
