Chemical Properties — Unit test

Question 1

Tijuan mixed a solid and a liquid together in a beaker. He determined that a chemical change occurred.

Revolt · Accepted Answer

baking soda mixed into vinegar, because the production of bubbles indicates that a new substance formed

Question 2

If two items are equal in size, the denser one will

Revolt · Accepted Answer

be heavier.

Question 3

The density of solid aluminum is 2.70 g/cm3. If a 1g piece of aluminum is dropped in a cup of water, what will happen to the aluminum? (The density of water is 1.00 g/cm3.)

Revolt · Accepted Answer

It will sink to the bottom.

Question 4

The descriptions below explain two ways that water is used by plants on a sunny day.I. In a process called transpiration, some liquid water in leaves changes to water vapor. The water vapor is released into the air through tiny pores in the leaves. This allows more liquid water from the soil to be pulled up the roots and stem to replace water lost from the leaves.II. Plants use some of this water in leaves in a process called photosynthesis. During photosynthesis, water and carbon dioxide break apart and recombine to form two new substances, oxygen and glucose.

Revolt · Accepted Answer

In transpiration, because some of its properties change, water undergoes a physical change but keeps its identity. In photosynthesis, because its identity changes, water undergoes a chemical change.

Question 5

Which can occur in a physical change?

Revolt · Accepted Answer

The particles can arrange in different ways.

Chemical Properties — Unit test Answers

More from this Course

TRY EDGENUITY HACKS