What happens when a substance undergoes a physical change

HERES ALL THE TEST ANSWERS

Explanation:

Physical Properties

1-What happens when a substance undergoes a physical change?

answer-Some physical properties change, but the substance keeps its identity.

2-What is an example of a physical change?

answer-ice forming and then melting back into water

3-When liquid gold becomes a solid, its particles get closer together. Which best describes what happened to the gold?

answer-the rearrangement of particles in a physical change

4-Eugene describes the physical property of a material as “sweet and floral.” What physical property of the material is Eugene most likely observing?

answer-odor

5-Which can occur during physical change?

answer-The particles can arrange in different ways.

6-If there is 8 g of a substance before a physical change, how much will there be afterwards?

answer- 8 grams

7-Which statement about the physical change of liquid water boiling into steam is true?

answer-the heat added represents an energy change

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?

answer- it will still weigh 15 grams

9-Which statement best compares and contrasts two physical properties of matter?

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.

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?

answer-solubility

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.