Gases Worksheet: Identify Properties for Grade 4

📚 Topic Summary

Gases are all around us! They're one of the three main states of matter (the others are solids and liquids). Unlike solids, gases don't have a fixed shape or volume. They can spread out to fill any container. Think about the air you breathe – it's a mixture of gases! Gases are made up of tiny particles that are constantly moving and bumping into each other. Let's explore some properties that help us identify them. 😉

🧪 Part A: Vocabulary

Match the term with its definition:

1. Term: Volume
2. Term: Compressibility
3. Term: Diffusion
4. Term: Expand
5. Term: Gas

1. Definition: The ability to be squeezed into a smaller space.
2. Definition: A state of matter that has no fixed shape or volume.
3. Definition: To increase in size or amount.
4. Definition: The amount of space that something occupies.
5. Definition: The process of spreading out to fill a space.

Write the number of the correct definition next to each term:

• Volume: ____
• Compressibility: ____
• Diffusion: ____
• Expand: ____
• Gas: ____

💨 Part B: Fill in the Blanks

Gases don't have a definite _____ or _____. They can be easily _____, meaning their volume can be reduced. Gases also have the ability to _____ to fill any available space. The air we breathe is a mixture of different _____, including oxygen and nitrogen.

Word Bank: shape, expand, volume, compressed, gases

🤔 Part C: Critical Thinking

Imagine you have a balloon filled with air. Explain what happens to the air inside the balloon when you squeeze it. Why does this happen?