Environmental Factors Affecting Plant Growth

Which layer of soil contains lots of roots and minerals for growing plants?

• Topsoil

• Subsoil

• Bedrock

• Parent Material

True or False: The layers of soil go in this order: Topsoil, bedrock, subsoil.

• True

• False

Identify the soil horizon:
Consists of topsoil (mostly sand and some clay) rich in humus (O horizon) and leached soil deficient in humus and minerals.

• O horizon
• A horizon
• B horizon
• C horizon

Peter wants to grow some sweet peppers in his garden. He tests the pH of the soil and finds that the pH is very low. What can he do to increase the pH?

• Add Fertilizer

• Add Manure

• Add Limestone

• Water the soil

True or False: A pH of 14 would be too basic for a plant to survive.

• True

• False

What is the best pH range for plants to grow in?

• 1-7

• 5.5 – 7.5

• 7-10

• 10+

Soil is made of

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

Tags

NGSS.MS-ESS2-1

What do we call the layers of soil?

• Deposits

• Horizons

• Minerals

• Rocks

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 (OM)

What does weathering mean?

• To form or create new
• To build up
• To break down
• To completely destroy