Soil Review

The very top layer of soil is mostly made of

• Solid rock

• Clay and mineral deposits

• A mixture of minerals and organic material

• Mostly organic material (humus)

Which layer of soil is on the bottom?

• topsoil
• subsoil
• bedrock
• bottomsoil

Soil is made of

• weathered rocks and minerals
• dead plants and animals
• air and water
• all of the above

Tags

NGSS.MS-LS2-3

Why is soil an important natural resource?

• soil is used to make buildings
• soil can grow crops
• soil comes from bedrock
• soil is full of mircobes

Tags

NGSS.MS-LS1-5

The way soil feels is called its _____.

• type
• texture
• particle
• grain size

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?

• Plant A will not grow any flowers

• Plant B will die

• Humus made plant A grow faster

• Humus had not effect on plant A

The texture of soil depends on

• How much water it can retain

• Particle size

• Soil color

• Soil mass

A student wants to know which soil is the best to plant tomatoes in. Which of the following experiments can he complete to figure it out?

• 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.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Students wanted to test out the capacity to retain water. They poured water through the soil samples and waited for 2 minutes. Based on the results, which of the following is a correct conclusion?

• Water seeped through sample A the slowest

• Water seeped through sample B the fastest

• Sample A retained the most water

• All samples retained the same amount of water

Tags

NGSS.MS-PS1-2

A gardener wants to add humus to his soil because it contains a lot of nutrients and helps retain water. What does humus form from?

• Sand

• Rocks and minerals

• Decayed animals and plants

• Volcanic lava