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Matter States and Atoms

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Matter States and Atoms

Atoms and molecules in different states of matter

📚 Part 1: Multiple Choice

1. What is the smallest unit of matter?

Molecule

Atom

Element

Compound

2. In which state of matter are atoms packed most tightly together?

Gas

Liquid

Solid

Plasma

3. Which state of matter has the highest kinetic energy?

Solid

Liquid

Gas

All have the same kinetic energy

4. Check all properties that describe a liquid:

Has definite shape

Has definite volume

Takes shape of container

Particles can move freely

🔬 Part 2: Fill in the Blanks

5. Complete the sentences using vocabulary words:

Word Bank: atom, molecule, solid, liquid, gas, kinetic energy, definite

a) A _____________ is made up of two or more atoms bonded together.

b) Ice is an example of a _____________ because it has a _____________ shape and volume.

c) The energy of motion that particles have is called _____________.

d) In a _____________, particles are far apart and move quickly in all directions.

6. Draw and label the particle arrangement for each state of matter:

Solid:

Liquid:

Gas:

✏️ Part 3: Short Answer

7. Explain why a gas takes both the shape and volume of its container.
8. Compare the kinetic energy of particles in ice water (32°F) versus hot water (180°F). Explain your answer.
9. A student says that atoms in a solid don't move at all. Is this correct? Explain your answer.

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