Question

three states of matter
by leslie cargile

1. atoms that are joined together are called...

a. liquids b) molecules
c. shapes d. solids

1. what shape is a liquid?

a sphere b. circle
c. solid shape d. the shape of its container

1. what happens to water when it evaporates?

a. it turns into a solid. b. it turns into a gas.
c. it turns into an atom. d. it disappears.

1. what causes water to evaporate?

a. warm temperatures b. cold temperatures
c. electricity d. food coloring

1. how are molecules in a solid different from molecules in a liquid?

a. molecules in a liquid are more tightly packed than molecules in a solid.
b. molecules in a liquid cannot move, but molecules in a solid can.
c. molecules in a solid are more tightly packed than molecules in a liquid.
d. molecules are loosely packed and easily turn into steam.

1. list two examples of solids, liquids, and gases.

solids -
liquids -
gas -

Explanation:

1. Atoms joined together form molecules. Liquids and solids are states of matter, and shapes are not related to joined atoms in this context.
2. Liquids take the shape of their container. A sphere and circle are specific geometric shapes, and a solid shape is for solids, not liquids.
3. Evaporation is the process where a liquid (water) turns into a gas (water vapor). It doesn't turn into a solid (that's freezing), an atom (atoms make up matter but evaporation is a state - change), or disappear (it just changes state).
4. Warm temperatures provide the energy for water molecules to gain enough kinetic energy to escape from the liquid phase and evaporate. Cold temperatures would slow down or prevent evaporation. Electricity and food coloring do not cause evaporation.
5. In a solid, molecules are more tightly packed compared to a liquid. In a liquid, molecules can move more freely than in a solid (so option b is wrong). Option a has the packing order reversed. Option d is incorrect as it's not about turning into steam (which is a gas - liquid change) but about molecular packing.
6. Solids: examples could be a book and a rock. Liquids: examples could be milk and juice. Gases: examples could be oxygen (in the air) and carbon dioxide.

Answer:

1. B. molecules
2. D. the shape of its container
3. B. It turns into a gas
4. A. warm temperatures
5. C. Molecules in a solid are more tightly packed than molecules in a liquid
6. Solids - book, rock; Liquids - milk, juice; Gas - oxygen, carbon dioxide