Biodiversity Test Flashcards Preview

7th Grade Science > Biodiversity Test > Flashcards

Flashcards in Biodiversity Test Deck (30):
1

A --- shaped curve describes the tendency of a population to grow w/out limit to its size

J

2

Drought is an example of a density- ----- factor

Independent

3

Disease is an example of a density- ---- factor

Dependent

4

A --- shaped curve describes the tendency of a populations growth rate to slow or stop as resources become less available

S

5

How do you calculate the Population Growth Rate

Birth rate-death rate=PGR

6

What is the difference between renewable and no renewable resources

Renewable- can reginerate
No renewable- cannot reginerate

7

What effect does deforestation have on forest resources

Leads to severe soil erosion, remove habitats

8

What human activities have affected our water and ocean resources

Pollution, landfills, improperly discarded chemicals, overfishing, oil spills, runoff, sewage

9

What human activities have led to desertification

Overgrazing and farming combined with dry climates lead to desertification

10

What are some efforts taken by humans to reduce air pollution and acid rain

Emission control standards, clean-air regulations, electric cars

11

Humans use resources without harming ecosystem

Sustainable use

12

Total of all the variety of organisms in a specific area

Biodiversity

13

Protected strips of land to allow organism to move freely

Habitat corridors

14

Land development separates ecosystems into pieces

Habitat fragmentation

15

Species introduced to new habitats without natural predators

Invasive species

16

Breed and raise endangered species in protected habitats

Reintroduction program

17

Species disappears from its natural range

Extinction

18

Damage to habitats by air, water, or land pollution

Habitat degradation

19

The number of organisms a population can support over an indefinite period of time is called its ----- capacityy

Carrying

20

Group of organisms of the same species that live in the same area

Population

21

Number of individuals per unit area

Population density

22

Occurs when individuals of population reproduce at constant rate

Exponential growth

23

As resources become less available the population growth rate slows or stops

Logistics growth

24

The number of organisms of one species that can be supported in an environment

Carrying capacity

25

Study of info about human populations

Demography

26

Refers to the number of people of each different age level

Age structure

27

Resources that can regenerate if they are alive, or can be replaced by biogeochemical cycles of they are nonliving

Renewable resources

28

Resources that cannot be replenished by natural processes

Nonrenewable resources

29

A way of using natural resources without depleting them or causing long term environmental harm

Sustainable development

30

Biodiversity

The total of all the variety of organisms in a specific area