Envirothon Soil Horizons Quiz

What do numbers at the beginning of a horizon indicate?

• The horizon's texture

• A different deposit or parent material

• The horizon's structure

• The horizon's color

What is the purpose of additional lowercase letters in soil horizons?

• To mark the horizon's color

• To show the horizon's depth

• To differentiate horizons further

• To indicate the horizon's age

Which of the following is NOT a key takeaway about soil horizons?

• Multiple of the same horizon can be found in one profile

• Horizons are general concepts

• All horizons are found in every soil

• Horizons describe major processes in the layer

What does the notation 'E/B' in soil horizons mean?

• A smooth transition between E and B processes

• A single process layer

• Distinct areas of E and B processes

• A dominant E process with a B process

What is a key concept about soil horizons?

• Horizons describe major processes in the layer

• Horizons are only found in tropical soils

• Horizons are specific to one soil type

• All horizons are identical

What is the significance of transitional horizons?

• They indicate a lack of soil development

• They show a combination of two processes

• They are unique to desert soils

• They are only found in wet climates

Which horizon is made up of partially weathered rocks?

• Horizon A

• Horizon B

• Horizon B or D

• horizon c

Soil is made of ---

• weathered rocks and minerals.

• dead plants and animals.

• air and water.

• all of the above

Which soil looks like it has the least organic matter in it?

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MIXTURE OF ROCK, MINERAL PARTICLES, AND ORGANIC MATTER...... 

• HORIZONS
• HUMUS
• SOIL
• CLAY