Match each word to its correct meaning. 1. humus
the thin upper layer of Earth's crust that supports plant life
2. inorganic
a vertical section of soil that shows the horizon and parent material
3. organic
the layer of loose rock on the surface of the earth; also called mantle rock
4. parent material
dark colored organic material in soil; it is left over from the decay of living things
5. regolith
a physical property of soil that describes how the soil feels, and the relative components of sand, silt, and clay sized particles
6. soil
a chemical property of soils that describes the measure of hydrogen ions in a soil sample; how acidic or basic a soil sample is
7. soil horizon
a substance that does not contain carbon and hydrogen atoms, such as salts, rocks, and minerals
8. soil ph
a distinct layer of soil that has characteristic properties
9. soil profile
the rock material that was weathered to form the sediments in a given soil
10. soil texture
a substance that contains carbon and hydrogen atoms, such as carbon dioxide, glucose, methane, and nucleic acid

1. Soil.

2. Soil profile.

3. Regolith.

4. Humus.

5. Soil texture.

6. Soil pH.

7. Inorganic.

8. Soil horizon.

9. Parent material.

10. Organic.

Explanation:

1. Soil: the thin upper layer of Earth's crust that supports plant life. There are three (3) main types of soil; sandy, clay and loamy soil.

2. Soil profile: a vertical section of soil that shows the horizon and parent material.

3. Regolith: the layer of loose rock on the surface of the earth; also called mantle rock.

4. Humus: dark colored organic material in soil; it is left over from the decay of living things.

5. Soil texture: a physical property of soil that describes how the soil feels, and the relative components of sand, silt, and clay sized particles.

6. Soil pH: a chemical property of soils that describes the measure of hydrogen ions in a soil sample; how acidic or basic a soil sample is.

7. Inorganic: a substance that does not contain carbon and hydrogen atoms, such as salts, rocks, and minerals.

8. Soil horizon: a distinct layer of soil that has characteristic properties.

9. Parent material: the rock material that was weathered to form the sediments in a given soil.

10. Organic: a substance that contains carbon and hydrogen atoms, such as carbon dioxide, glucose, methane, and nucleic acid.

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y