Flashcards in Ch. 24 Practice Deck (24)
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1
What is the current human population of the Earth?
A bit over 7 billion
2
______ ______ is the maximum population that a particular environment can support for an indefinite period.
Carrying capacity
3
Acid deposition
Weakens trees and makes them more susceptible to disease and insects
4
Increase in ocean temperatures due to global warming
Loss of coral reefs, potential loss of coastal wetlands
5
Ozone depletion
Limits crop and tree growth, and kills plankton that sustain ocean life
6
Contamination by human-made organic compounds
Interruption of hormone function in some animals
7
Birthrates and death rates for human populations are usually reported as rates per ______ people.
1,000
8
What metals are dangerous to human health?
The heavy metals, including lead, mercury, arsenic, cadmium, tin, chromium, zinc, and copper
9
Any undesired alteration of the environment, often caused by human activities, is known as ______.
Pollution
10
Fossil fuels are derived from:
Remains of plants and animals that died millions of years ago
11
In what ways does biodiversity within ecosystems support biogeochemical cycles?
• Removal of carbon dioxide from the atmosphere
• Uptake of excess soil nitrogen
• Provision of phosphate
• Provision of freshwater
12
The maximum population growth rate under ideal conditions is called a population's ______ potential.
Biotic
13
______ can be described in terms of numbers of different species.
Biodiversity
14
In what ways do exotic species get introduced to new ecosystems?
• Accidental transport
• Agriculture
• Colonization
15
Chemicals that treat cancer have been obtained from the ______ of Madagascar.
Rosy periwinkle
16
A type of mining in which land is removed to reach a mineral is called ______ mining.
Strip
17
What benefits are provided by coastal wetlands?
• Areas for fish spawning
• Bird habitats
• Protection from storms
18
Fossil fuels and minerals are examples of ______ resources.
Non renewable
19
In ______, species are hunted, harvested, or collected to the point that their populations decline dramatically.
Overexploitation
20
Forests stabilize the climate because thet take up excess ______.
Carbon dioxide
21
Over the past 50 years or so, world food production has increased largely due to
Modern farming methods
22
Two ways that water can be conserved in agriculture relates directly to planting ______ tolerant and ______ tolerant crops.
Drought, salt
23
Greenhouse gases are contributing to an increase in global temperature because they trap ______ in Earth's atmosphere.
Heat
24
