ch 1 ap enviro

Seventy-five square kilometers is equal to _____ square miles. (1 km = 0.6214 mile)

28.96

If land is cleared at a rate of 456 hectares per week, approximately how many acres per year that are being cleared?

58,600

Environmental Studies cover

All of these answers are correct

Calculating ecological footprint involves consideration of

All of these answers are correct.

Deductive reasoning

Both b and c.

Passage 1-2 An experiment uses two groups of mice with 20 individuals in each group. Both groups are fed the same amount of water and food every day. They are kept in similar cages in a climate-controlled room. The experimental group is given five doses of a pesticide every day. After two months, the amount of an enzyme in the brains of the mice was measured. Use Passage 1-2. The group of mice not exposed to the pesticide is called the

a. control. Correct

Natural experiments lack

an exact replication of the experiment.

Two square km is equal to _____ square meters.

b. 2,000,000 Correct

Passage 1-2 An experiment uses two groups of mice with 20 individuals in each group. Both groups are fed the same amount of water and food every day. They are kept in similar cages in a climate-controlled room. The experimental group is given five doses of a pesticide every day. After two months, the amount of an enzyme in the brains of the mice was measured. Use Passage 1-2. The dependent variable in this experiment is the

b. enzyme in the brain of the mice. Correct

Passage 1-1 An experiment is set up to determine if wheat grows better when it is planted by itself or together with clover. The setup involves 3 pans of each treatment. Set-up A, B and C contain wheat alone. Set-ups D, E and F contain clover and wheat planted together, in rows alternating one seed of each type. One hundred seeds are planted in each pan. all treatments contain the same type of soil, are planted in the same size of pan, are exposed to the same amount of sunlight, and are maintained at the same temperature throughout the course of the experiment. Use Passage 1-1. The dependent variable in this experiment could be the

c. height of the wheat. Correct

The number of species on Earth that have been identified is approximately

d. 2 million Correct

The following are examples of sustainable practices. I. Forests cut for timber are replanted II. Steel is recycled. III. Plastic is disposed of in landfills because that it is less expensive than recycling.

d. I and II only. Correct

The study of environmental science is concerned with

e. both a and b. Correct

When we discuss "our environment" we are referring to

e. the sum of all the conditions surrounding us that influence life.

Economic development goes hand in hand with

increased consumption of resources.

Total world grain production has

increased fairly steadily since 1950.

The concept of ecological footprint is measured in terms of the amount of

land area.

The extinction of mastodons and giant ground sloths in the Americas is attributed to

overhunting by humans.

Passage 1-1 An experiment is set up to determine if wheat grows better when it is planted by itself or together with clover. The setup involves 3 pans of each treatment. Set-up A, B and C contain wheat alone. Set-ups D, E and F contain clover and wheat planted together, in rows alternating one seed of each type. One hundred seeds are planted in each pan. all treatments contain the same type of soil, are planted in the same size of pan, are exposed to the same amount of sunlight, and are maintained at the same temperature throughout the course of the experiment. Use Passage 1-1. The treatments planted with wheat alone are the

replication

Passage 1-1 An experiment is set up to determine if wheat grows better when it is planted by itself or together with clover. The setup involves 3 pans of each treatment. Set-up A, B and C contain wheat alone. Set-ups D, E and F contain clover and wheat planted together, in rows alternating one seed of each type. One hundred seeds are planted in each pan. all treatments contain the same type of soil, are planted in the same size of pan, are exposed to the same amount of sunlight, and are maintained at the same temperature throughout the course of the experiment. Use Passage 1-1. Several setups of each treatment are prepared to fulfill a very important requirement of scientific experimentation, specifically the need for

replication.