Ch. 24 Practice Flashcards Preview

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Flashcards in Ch. 24 Practice Deck (24)
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1
Q

What is the current human population of the Earth?

A

A bit over 7 billion

2
Q

______ ______ is the maximum population that a particular environment can support for an indefinite period.

A

Carrying capacity

3
Q

Acid deposition

A

Weakens trees and makes them more susceptible to disease and insects

4
Q

Increase in ocean temperatures due to global warming

A

Loss of coral reefs, potential loss of coastal wetlands

5
Q

Ozone depletion

A

Limits crop and tree growth, and kills plankton that sustain ocean life

6
Q

Contamination by human-made organic compounds

A

Interruption of hormone function in some animals

7
Q

Birthrates and death rates for human populations are usually reported as rates per ______ people.

A

1,000

8
Q

What metals are dangerous to human health?

A

The heavy metals, including lead, mercury, arsenic, cadmium, tin, chromium, zinc, and copper

9
Q

Any undesired alteration of the environment, often caused by human activities, is known as ______.

A

Pollution

10
Q

Fossil fuels are derived from:

A

Remains of plants and animals that died millions of years ago

11
Q

In what ways does biodiversity within ecosystems support biogeochemical cycles?

A
  • Removal of carbon dioxide from the atmosphere
  • Uptake of excess soil nitrogen
  • Provision of phosphate
  • Provision of freshwater
12
Q

The maximum population growth rate under ideal conditions is called a population’s ______ potential.

A

Biotic

13
Q

______ can be described in terms of numbers of different species.

A

Biodiversity

14
Q

In what ways do exotic species get introduced to new ecosystems?

A
  • Accidental transport
  • Agriculture
  • Colonization
15
Q

Chemicals that treat cancer have been obtained from the ______ of Madagascar.

A

Rosy periwinkle

16
Q

A type of mining in which land is removed to reach a mineral is called ______ mining.

A

Strip

17
Q

What benefits are provided by coastal wetlands?

A
  • Areas for fish spawning
  • Bird habitats
  • Protection from storms
18
Q

Fossil fuels and minerals are examples of ______ resources.

A

Non renewable

19
Q

In ______, species are hunted, harvested, or collected to the point that their populations decline dramatically.

A

Overexploitation

20
Q

Forests stabilize the climate because thet take up excess ______.

A

Carbon dioxide

21
Q

Over the past 50 years or so, world food production has increased largely due to

A

Modern farming methods

22
Q

Two ways that water can be conserved in agriculture relates directly to planting ______ tolerant and ______ tolerant crops.

A

Drought, salt

23
Q

Greenhouse gases are contributing to an increase in global temperature because they trap ______ in Earth’s atmosphere.

A

Heat

24
Q

Concerns about the use of genetically engineered ______ include possible damage to the environment and health problems in humans.

A

Crops