Atoms and Matter Assessment

Name:

Date:

🔬 Part 1: Multiple Choice

1. Which particle is found in the nucleus of an atom?

Electron

Proton

Neutron

Both proton and neutron

2. What happens to particles when matter is heated?

They move more slowly

They move faster and spread apart

They stop moving

They disappear

3. Which states of matter have particles that are closely packed together? (Select all that apply)

Solid

Liquid

Gas

Plasma

4. During an experiment, what is the first step of the scientific method?

Form a hypothesis

Collect data

Ask a question or make an observation

Draw conclusions

✏️ Part 2: Short Answer Questions

5. Complete the following sentences about atomic structure:

a) The centre of an atom is called the __________.

b) Electrons have a __________ charge and orbit around the __________.

c) The number of __________ determines what element an atom is.

6. Explain why ice floats on water using your knowledge of particle behaviour and density.

7. During our unit experiments, describe one safety procedure you followed and explain why it was important.

8. A student observes that sugar dissolves faster in hot water than cold water. Write a hypothesis to explain this observation.

Hypothesis:

🎯 Part 3: Application and Analysis

9. Draw a simple diagram showing the arrangement of particles in a solid, liquid, and gas. Label each state of matter.

10. You are investigating how temperature affects the rate of food colouring spreading through water. Design a simple experiment by completing the following:

Materials needed:

Method (3 steps):

What would you measure/observe?

11. Explain how understanding atomic structure helps scientists develop new materials (such as stronger metals or better plastics). Use scientific vocabulary in your answer.