Unit Test — Unit test Answers

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Analyze the chart below and answer the question that follows. Data courtesy of the CIA World Factbook, 2010 Which of the following statements is true, based on the chart above?

Question illustration
A
The United States controls the same amount of arable land as China and India combined.
B
Brazil has so little arable land that it is an underdeveloped country.
C
Seven countries control almost half of the planet's arable land.
D
Most arable land is located in the Northern Hemisphere.
5

Which of the following statements best explains why farmers in Mediterranean climates have an advantage?

A
This region receive the best rainfall and climate for farming.
B
Europe is one of the world’s most important markets.
C
Farmers can increase their profits because they work on larger farms.
D
Many crops that grow well in this region are high-value crops.
6

Which of the following usually does not impact agricultural production and consumption?

A
disease
B
the availability of arable land
C
supply and demand
D
infrastructure
7

All of the following are potential effects of clearing land except __________.

A
less biodiversity
B
less arable land
C
more CO2 emissions
D
more erosion
8

What factors contribute to the United States' role as a leader in agricultural production and consumption?

Answer not available
9

Using complete sentences, explain why farming in Africa has not made the gains seen elsewhere in the world.

Answer:

Farming in many parts of Africa has not made the gains seen elsewhere because farmers often have limited access to irrigation, improved seeds, fertilizer, modern equipment, and financing. Unreliable rainfall, poor soils, pests, and inadequate roads and storage can also reduce harvests and make it difficult to sell crops. Conflict and unstable policies have added to these challenges, slowing the spread of agricultural improvements, although conditions vary across the continent.

10

Which of the following is not a factor that is preventing agricultural success in less-developed countries?

A
geography and climate
B
lack of access to fertilizers and machinery
C
less access to education and training
D
investment in high-value crops
12

Using complete sentences, explain how ice was produced and delivered before the invention of modern refrigeration.

Answer:

Before modern refrigeration, workers cut blocks of ice from frozen lakes and rivers during winter. They stored the blocks in insulated icehouses, often packed with sawdust, and later transported them by wagons, trains, or ships to homes and businesses.

13

Which of the following statements describes a benefit of modern refrigeration?

A
Homes use less energy.
B
Perishable items can be kept safely for longer.
C
Poultry no longer is contaminated by salmonella.
D
Fresh fruit does not need to be washed before consumption.
14

Which of the following statements about agricultural production is false?

A
The world’s population is expected to reach 10 billion by 2050.
B
Agricultural production must triple (increase 300%) by 2050 to meet needs.
C
Production is expected to increase at an unlimited level due to technological advancements.
D
Water scarcity and soil erosion are of increasing concern.
15

Using complete sentences, explain how large-scale agriculture leads to increased atmospheric CO2.

Answer:

Large-scale agriculture can increase atmospheric CO2 when forests and other natural areas are cleared to create farmland, releasing stored carbon and reducing the number of trees that absorb CO2. Large farms also use fuel-powered machinery and transportation, which release carbon dioxide when fossil fuels are burned.

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