Physical Science

2. Plants breathe in ___ dioxide gas to make their own food.
5. The amount of material or "stuff" inside an object.
8. The invisible pulling force that keeps our feet on the ground and pulls objects down.
10. The slowing-down force that happens when two surfaces rub against each other.
12. The primary energy source plants need to grow and make food.
13. The measure of how hard gravity pulls down on an object's mass.
14. A state of matter that has its own fixed shape, like a rock or a table.

1. A state of matter that expands to fill any space, like air.
3. The invisible gas that animals and humans breathe in to live.
4. The part of the plant where food is made using sunlight.
5. Anything that takes up space and has weight.
6. Matter is defined as anything that has mass and takes up ___.
7. Any push or pull that makes an object move, stop, or change direction.
9. A state of matter that flows and takes the shape of its container, like water.
11. The part of the plant that absorbs water and nutrients from the soil.