2019 Test Review #1 Unit 8

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Checking for Understanding

Although a person might take in 2000 calories a day it might not be the right type of calories. A person who eats only chicken fingers, chips, and chocolate chip cookies every day is actually ___________________. *

1 point

undernourished

malnourished

food insecure

food secure

famished

Vitamin A deficiency can result in _______________. *

1 point

anemia

goiter

blindness

cancer

osteoporosis

Which three grains make up the largest component of the human diet? *

1 point

rice, corn, rye

corn, rye, soybean

wheat. rye, corn

wheat, rice, corn

According to Evan Fraser of the University of Guelph, producing food in the world is going to be hard because of the high demand for food, high energy prices, and ____________________. *

1 point

the introduction of more genetically modified foods

the lack of water for irrigation

the lack of land to grow crops

the changing climate

the uneven distribution to developing countries

Healthy soils provide many ecosystem services. Which of the following is NOT an ecosystem service provided by soils? *

1 point

Soil helps control where rain water goes.

The minerals in soil are responsible for detoxifying inorganic materials.

Carbon, nitrogen, and phosporus are stored, transformed, and cycled in soil.

Soils provide a habitat for soil microbes.

Soils help with transpiration of minerals from land to leaves of plants.

Which of the following is NOT one of the five major factors that influence soil formation? *

1 point

Climate

Time

Biological

Topography

Which of the following describes a loamy soil? *

1 point

20% sand, 20% silt, 60% clay

20% sand, 30% silt, 50% clay

40% sand, 20% silt, 40% clay

20% sand, 40% silt, 40% clay

40% sand, 40% silt, 20% clay

What could a farmer add to their soil to help buffer against low pH? *

1 point

sulfur

pesticides

sand

limestone

granite

_____________ modifies microclimates by: slowing wind speeds, shading the soil surface, and retaining snow, resulting in cooler and more moist soil environments, as well as less variation in soil-forming environments with topography. *

1 point

Vegetation

Loam

Rain shadow effect

Hadley cells

Doldrums

____________ and organic matter have negative charges that can hold and release positively charged nutrients (cation exchange capacity). That static charge keeps the nutrients from being washed away, and holds them so they are available to plant roots and soil microorganisms. *

1 point

Sand

Silt

Clay

Granite

In agriculture, ___________ refers to the loss of water-soluble plant nutrients from the soil, due to rain and irrigation. *

1 point

soil texture

soil permeability

leaching

porosity

cation exchange capacity

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