Answers Madison 2017 Phy Sci A-35 SSUnit Test

Unit Test — Unit test Answers

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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.

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.

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

In transpiration, because its physical properties change, water undergoes a physical change and loses its identity. In photosynthesis, because it keeps its identity, water undergoes a chemical change.

In transpiration, because its chemical properties change, water undergoes a chemical change and loses its identity. In photosynthesis, because it keeps its identity, water undergoes a physical change.

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What is the density of a 700 kg object with a volume of 649 m3? (Density: D = )

0.927 kg/m3

.4543 kg/m3

1.079 kg/m3

4.543 kg/m3

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

ice mixed into warm oil, because the change of state that occurred when the ice melted cannot be reversed

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

sugar mixed into hot water, because the disappearance of solid indicates that the chemical identity of the sugar changed

sand mixed into water, because when sand was added the mass of the beaker increased

The diagram shows changes of state between solid, liquid, and gas. The atoms of a substance gain energy during a change of state. Before the change, the atoms are close together and cannot slide past one another. After the change, the substance can fill its container.

What happens when an object has a density greater than that of the surrounding liquid?

The object will sink.

The object will float.

The object will become a solid.

The object will become a gas.

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