Soil

Front

The very top layer of soil is mostly made of

Back

Mostly organic material (humus)

Front

Which layer of soil is on the bottom? Options: topsoil, subsoil, bedrock, bottomsoil

Back

bedrock

Front

What is soil made of?

Back

Weathered rocks and minerals, dead plants and animals, air and water.

Front

Why is soil an important natural resource?

Back

Soil can grow crops.

Front

The way soil feels is called its _____ (Options: type, texture, particle, grain size).

Back

texture

Front

You did an experiment to see how adding humus would improve plant growth. You added humus to plant A and kept plant B in regular soil. They both got the same amount of sunlight and water. Based on the results, what can you conclude?

Back

Humus made plant A grow faster

Front

The texture of soil depends on

Back

Particle size

Front

Which experiment can determine the best soil for planting tomatoes? Options: Plant seeds in each type of soil, Pour 200 mL of water into each soil to see how much water is retained, Compare the color of the soil to a color chart, Wet the soil and feel the texture.

Back

Plant seeds in each type of soil.

Front

Students tested soil samples for water retention. What was the conclusion?

Back

Water seeped through sample B the fastest

Front

What does humus form from?

Back

Decayed animals and plants