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Question 21 (3 points)

Match the sustainable farming method with its description.

Sustainable Agriculture: A Thought ...

Column A
1.
Terrace cropping:
Terrace cropping
2.
Crop Rotation:
Crop Rotation
3.
Hydroponics:
Hydroponics
Column B
a.This method has a cycle of nutrients from a fish tank to the growing vegetation. The vegetation gets their nutrients from water instead of soil, and the nutrients are provided by the fish themselves.
b.This method involves planting a row of trees on either side of a crop. The Tress provide protection for the crop from wind and sun.
c.Cutting steps into the side of a hill to create flat areas to grow crops
d.
This method takes advantage of the fact that some crop's input and output of nutrients to and from the soil varies, so the soil's nutrients do not deplete.

Question 22 (1 point)
Talc can be scratched by all other minerals because it has a 1 on the ______ scale. Diamonds on the other hand cannot be scratched by any other mineral (besides another diamond) because it is a 10 on the ___ scale

Cutting tools - Moh's scale of hardness ...

a
Luster
b
Streak
c
Crystal structure
d
Hardness
Question 23 (1 point)
Iron Pyrite (Fools Gold) is Gold in Color but it's powder is actually black/brown, whereas real gold is both gold in color and powder. What test can a gold miner perform to tell if they have Gold verus Iron Pyrite, based on this information?

Pyrite cubes

a
Hardness
b
Luster
c
Density
d
Streak
Question 24 (1 point)
Fossil fuels can come in 3 forms (solid, liquid and gas). Which item below is NOT a fossil fuel?

What Are Fossil Fuels? | Smithsonian Ocean

a
Natural Gas
b
Biofuel
c
Oil/Petroleum
d
Coal

1 answer

Here are the answers to your questions:

Question 21: Match the sustainable farming method with its description.

  1. Terrace cropping:
    c. Cutting steps into the side of a hill to create flat areas to grow crops.

  2. Crop Rotation:
    d. This method takes advantage of the fact that some crop's input and output of nutrients to and from the soil varies, so the soil's nutrients do not deplete.

  3. Hydroponics:
    a. This method has a cycle of nutrients from a fish tank to the growing vegetation. The vegetation gets their nutrients from water instead of soil, and the nutrients are provided by the fish themselves.

Question 22: Fill in the blanks.
Talc can be scratched by all other minerals because it has a 1 on the d. Hardness scale. Diamonds on the other hand cannot be scratched by any other mineral (besides another diamond) because it is a 10 on the d. Hardness scale.

Question 23: Test to differentiate Gold from Iron Pyrite.
The test a gold miner can perform to tell if they have Gold versus Iron Pyrite based on the powder color is d. Streak.

Question 24: Identify the item that is NOT a fossil fuel.
The item that is NOT a fossil fuel is b. Biofuel.