Question

you could also measure the object’s volume, or the space it occupies. cubic yard, gallon (gal), cubic inches (cu. in. or in³), liters (l), cubic meters (m³), and cubic centimeters (cm³) are all units of volume. different units of volume may be used for different states of matter.

measuring is important in science and is a skill you will need for life! you will learn much more about measuring as you explore other areas of earth science and do the lab activities in your lab manual.

2a review questions

1. define matter. why is it hard to completely define it?

1. contrast pure substances and mixtures.

1. what main factor determines a material’s state of matter? how does it affect the particles of a substance?

1. what are the differences in the motions and arrangements of particles in solids and liquids? between liquids and vapor?

1. how is the plasma state of a substance different from the gas of the same substance?

1. name the change of state for each of the following:

a. water vapor becomes liquid water droplets.
b. molten steel hardens.
c. on a cold, clear night, ice forms on the windshield of your family...
d. a block of dry ice slowly disappears.
e. a beaker of liquid oxygen bubbles and forms oxygen gas.

1. name three ways to measure matter.

2b forces and matter

how does matter interact to affect the world around us?

2.5 what is a force?

... you are using forces right now? you...

Explanation:

Since there are multiple review questions here, let's address question 6 as an example (you can ask for others too):

Question 6: Name the change of state for each of the following:

a. Water vapor becomes liquid water droplets.

The change from gas (water vapor) to liquid (liquid water) is condensation. This process occurs when gas loses energy (cools) and its particles come closer together to form a liquid.

Molten steel is liquid, and when it hardens, it becomes solid. The change from liquid to solid is freezing (or solidification). In this case, the liquid steel loses energy and its particles arrange into a more ordered, solid structure.

The water vapor in the air (gas) directly becomes ice (solid) on the cold windshield. This process of change from gas to solid without passing through the liquid state is deposition.

Answer:

a. Condensation

b. Molten steel hardens.