Environmental Science

Front 1

The change in food production over the past 40 years has ______ the change in population size

Back 1

Increased faster than

Front 2

The global change in food production over the past 40 years is the result of ______

Back 2

Improved crop varieties

Front 3

How many kilocalories are generally considered necessary for a healthy, productive life?

Back 3

2200 kcal/day

Front 4

Which region shows the trend that is different from other countries?

Back 4

Sub-Saharan Africa

Front 5

What is "food security"?

Back 5

The ability to obtain food on a day to day basis

Front 6

Which horizon is more important for growing food crops?

Back 6

O and C-horizon

Front 7

Why is it important to have high organic matter content in soil?

Back 7

All of the above

Front 8

The best soils have what texture?

Back 8

a mix of sand, silt and clay.

Front 9

Under the best conditions, how long does it take to accumulate a millimeter of topsoil?

Back 9

1 year

Front 10

What are the main ingredients in soil fertilizer?

Back 10

Nitrogen, Potassium, and Phosphorus

Front 11

Approximately what proportion of the world's agriculture land is irrigated?

Back 11

15%

Front 12

What is a negative consequence of irrigation?

Back 12

All of the above

Front 13

The "green revolution" in agriculture refers to the development of new varieties of crops that...

Back 13

Greatly increase yields

Front 14

What does CAFO stand for?

Back 14

Confined Animal Feeding Operation

Front 15

The crop with the greatest percent planted as genetically modified in the U.S. is _____

Back 15

Soybeans

Front 16

What is the term for the rate of illness?

Back 16

Morbidity

Front 17

Which cause of disease is expected to increase by 2020?

Back 17

Heart Disease

Front 18

Which is an example of an emergent disease?

Back 18

West Nile Virus

Front 19

What may be a cause for the increased incidence of emergent disease?

Back 19

All of the above

Front 20

Which factor is MOST important to prevent the evolution of resistance by bacteria to antibiotics or the evolution of resistance by pests to pesticides?

Back 20

Use high doses of antibiotic/pesticide

Front 21

Toxins that are referred to as endocrine disruptors...

Back 21

Interfere with hormones

Front 22

Which factors affect the toxicity of a substance?

Back 22

All of the above

Front 23

Toxic effects that may take longer to appear but may be longer lasting or permanent are referred to as

Back 23

Chronic

Front 24

Which shows a threshold effect?

Back 24

C

Front 25

What result would indicate that one substance is more toxic than the other?

Back 25

A lower LD50 value

Front 26

The four zones of the atmosphere differ in _____?

Back 26

Temperature change

Front 27

A measure of the Earth's reflectivity is _____

Back 27

Albedo

Front 28

Which gas contributes to the "Greenhouse Effect"

Back 28

Carbon Dioxide

Front 29

Over the past 30 years, atmospheric concentrations of greenhouse gasses have...

Back 29

Increased steadily

Front 30

The largest source of greenhouse gasses is...

Back 30

Burning fossil fuels

Front 31

Which country has the highest per capita rate of greenhouse gas emission?

Back 31

United States

Front 32

How did scientists estimate these values?

Back 32

From analyzing ice cores

Front 33

Change in Earth's average temperature over the past 100 years is estimate to be ____

Back 33

.6 Degrees C

Front 34

Which U.S. governmental agency is responsible for the Clean Air Act?

Back 34

EPA

Front 35

Which pollutant is a neurotoxin that can be especially dangerous in children?

Back 35

Lead