QUESTION 9 In 1974, Rowland and Molina demonstrated that ________. ultraviolet r

Question

QUESTION 9

In 1974, Rowland and Molina demonstrated that ________.

ultraviolet radiation contributes to skin cancer

VOCs are endocrine disruptors

the ozone hole is contributing to global climate change

CFCs deplete stratospheric ozone

acid deposition is killing North American forests

QUESTION 10

Producers and primary consumers can take up phosphorus dissolved in water;

higher-level consumers must obtain phosphorus from organisms below them in the food web.

True

False

QUESTION 11

Plants create biomass, the rate at which they create biomass is known as?

Potency

Productivity

Fertility

Capacity

QUESTION 12

Only about 2.5% of all the water on our planet is freshwater. However, ________.

most of this is in underground aquifers

most of this is far from the majority of the human population to access it

over half of this is in wetlands near coastlines and is becoming contaminated with salt water

most of this is in large, freshwater lakes

over half of this is extremely hard water and is nearly unusable for drinking or agriculture

QUESTION 14

Of all the greenhouse gases that you've read about, which one has the highest global warming potential?

Water Vapor

Carbon Dioxide

Methane

Nitrous Oxide

Chlorofluorocarbons

QUESTION 15

The largest reservoirs of carbon in the carbon cycle are ________.

plants and animals

hydrosphere

sedimentary rock and fossil fuels

atmosphere

freshwater systems and oceans

Explanation / Answer

9)  CFCs deplete stratospheric ozone

In 1974, chemists Sherwood Rowland and Mario Molina demonstrated that CFCs are the chemicals which persist in the stratosphere and deplete stratospheric ozone.

10) True

Higher-level consumers must obtain phosphorus from the below tropic level.

11) Productivity

Plants create biomass from energy , the rate at which energy is converted to biomass is known as  Productivity.

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