Key Vocabulary
solid
A solid is a form of matter with its own shape.
liquid
A liquid is matter that flows and takes the shape of its container.
gas
A gas is matter that changes shape to fill its container.
vapor
Vapor is water in the air that you can sometimes see.
freeze
Freeze means to change from a liquid to a solid.
container
A container is something that you can put things in.
melt
Melt means to change from a solid to a liquid.
boil
Boild means to make a liquid bot. To gas.
flow
Flow means for a liquid to move smoothly.
Visual Summary
Matter
| form | picture | description |
|---|---|---|
| solid |  | A solid has its own shape. |
| liquid |  | A liquid does not have its own shape. It takes the shape of its container. |
| gas |  | A gas does not have its own shape. It spreads to fill its container. |
Exercise
Match each word with its definition.
- a form of matter that flows. (liquid)
- a form of matter with its own shape. (solid)
- a form of matter that spreads to fill all the space of its container. (gas)
- to change from a liquid to a solid. (freeze)
- water in the air that you can sometimes see. (vapor)
- something that you can put things in. (container)
True of False
| Statement | True or False |
|---|---|
| A solid has its own shape. | T |
| Gas is matter that is solid. | F |
| If you freeze water, it change to ice. | T |
Reading passage
All things are made of matter. Matter has three forms. They are solid, liquid, and gas.
A solid is matter with its own shape. A rock and a book are solids. Even if we move a solid, it keeps its shape.
A liquid is matter that flows. Water and oil are liquid. A liquid does not have its own shape. A liquid takes the shape of its container.
A gas is matter that does not have its own shape like a liquid . A gas spreads to fill all the space of its container. When you blow up a balloon, the air spreads and fill all the space of it.
Matter can change forms. Freeze a liquid and it changes to a solid. If you freeze water, it changes to ice. Melt a solid and it changes to a liquid. An ice cream melts in the hot weather. Boil water and it changes to a vapor.
Reading skill
Main Idea and Detail
| form | description |
|---|---|
| solid | It is matter with its own shape. |
| liquid | It (flows). It does not have its own shape. It takes the shape of its (container) |
| gas | It spreads to fill the space of its container. (Air) in a balloon is gass. |
Comprehension
- What are two liquids? (water and oil)
- If you (freeze a liquid), the liquid turns to a solid.
- If you boil water, the water (becomes vapor which goes into the air).
- When you blow up a balloon, the gas (called air spreads and fills all the space of it).
source
From American Textbook Reading Science 14 35:38