Science worksheet asking students to classify common substances as solid, liquid, or gas.

Let's solve the worksheet titled "What's the Matter?" by identifying whether each item is a solid, liquid, or gas. Here's the explanation for each:

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1. Milk – Liquid

Milk flows and takes the shape of its container, so it’s a liquid.

2. Cookie – Solid

A cookie has a fixed shape and volume, so it’s a solid.

3. Oxygen – Gas

Oxygen is a colorless, odorless gas that fills the space around us.

4. Fish – Solid

Fish are living organisms with definite shape and volume (even though they can move). They are made of solid matter.

5. Pencil – Solid

A pencil is rigid and maintains its shape — it's a solid.

6. Maple syrup – Liquid

It flows slowly but still takes the shape of its container — a liquid.

7. Shampoo – Liquid

Shampoo pours and flows like other liquids.

8. Carbon dioxide – Gas

CO₂ is a gas at room temperature; we breathe it in and out.

9. Ice cube – Solid

Even though it's made of water, ice is frozen and has a fixed shape — solid.

10. Paint – Liquid

Paint flows and spreads when poured — it's a liquid.

11. Oil – Liquid

Oil pours and flows — a liquid.

12. Salt – Solid

Salt is crystalline and has a definite shape and volume — solid.

13. Water vapor – Gas

Water vapor is water in gaseous form — invisible and expands to fill space.

14. Gasoline – Liquid

Gasoline is a liquid fuel that flows and takes the shape of its container.

15. Helium – Gas

Helium is a noble gas used to fill balloons — it’s a gas.

16. Sand – Solid

Sand is made of tiny solid particles. Each grain is solid, so overall it's considered a solid.

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✔ Final Answers:

1. Milk – Liquid
2. Cookie – Solid
3. Oxygen – Gas
4. Fish – Solid
5. Pencil – Solid
6. Maple syrup – Liquid
7. Shampoo – Liquid
8. Carbon dioxide – Gas
9. Ice cube – Solid
10. Paint – Liquid
11. Oil – Liquid
12. Salt – Solid
13. Water vapor – Gas
14. Gasoline – Liquid
15. Helium – Gas
16. Sand – Solid

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This worksheet helps students understand the three states of matter: solids (definite shape and volume), liquids (definite volume, no definite shape), and gases (no definite shape or volume).