Unit 6 Vocabulary

2. care of Earth’s resources, like soil and water. It means using them wisely.
3. fast water can move through soil. Sandy soil has high permeability because water passes quickly.
4. small pieces of soil to test what it’s made of. For example, farmers use it to check if the soil is healthy for planting.
5. water moves down through soil. Think of how coffee filters water.
8. polluted soil so it can be used again. It helps make land healthy.
10. much salt is in the soil. Too much salt can harm plants.
11. measure of how acidic or basic soil is. Some plants grow better in certain pH levels.
12. water washes away nutrients from soil. This can leave plants without food to grow.
13. water enters the soil. It’s like when rain sinks into the ground instead of forming puddles.

1. natural resources in a way that doesn’t run out. It helps future generations.
6. many tiny spaces or holes are in soil. More holes = more air and water can pass.
7. much water soil can hold. If soil holds too little, plants dry out.
9. soil gets packed too tightly. Heavy machines or too much walking on soil can cause this.