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Science Grade 7 > Unit 1 (topic 1-7) > Flashcards

Unit 1 (topic 1-7) Flashcards

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Biology 101 flashcards
0
Q

Introduced Species

A

Species which are introduced into an environment where they are not naturally found

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1
Q

Succession

A

The Process by which new species gradually replace old species in an ecosystem.

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2
Q

Difference between

Primary and Secondary Succession

A

Primary Succession- Organism Growth in Bare Area

Secondary Succession- Organism Growth in Populated area (home of other species)

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3
Q

How do new forests Grow?

A

Fire- Seeds brake open- grow trees

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4
Q

Biological Control

A

Use of natural enemies- Cat for mice

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5
Q

Pollution

A

Harmful materials released into the environment from humans.

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6
Q

Acid rain

A

Rain that contains higher than normal levels of acid; cause of the waste put into the atmosphere.

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7
Q

Boiacculumation

A

Movement of pollutants up through the food chain.

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8
Q

Ecology

A

The study of relationship between living organisms and their environment

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9
Q

Ecologist

A

Some one that studies ecology

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10
Q

Habitat

A

A location that an organism lives

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11
Q

Adapted

A

Well suited

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12
Q

Adaption

A

is an inherited characteristic that helps and organism survive and reproduce in its environment
Fishes gills

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13
Q

Ecosystem

A

Is the interaction between living and non living things in an environment

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14
Q

Symbiosis

A

a relationship that lasts over time

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15
Q

Mutualism

A

Is a relationship in which two different in which each partner benefits

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16
Q

Parasitism

A

Is a symbiotic relationship where one organism benefits and one is harmed

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17
Q

Parasite

A

The organism that lives on or in another organism and feed on it.

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18
Q

Host

A

The Organism that a parasite lives and feeds on

Mommy

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19
Q

Commensalism

A

is a symbiotic relationship that one partner benefits and the other partner neither gains or looses from the relationship
Orchid on a tree trunk

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20
Q

Natural Resources

A

The material and products that are found in nature

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21
Q

Sustainability

A

The resources of nature are being renewed as quickly as they are being removed and all waste is being completely absorbed

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22
Q

Reduce

A

Creat less garbage

23
Q

Reuse

A

Reuse products rather then throwing them away

24
Q

Recycle

A

Create new products from old products

25
Q

Biotic

A

Living Organisms in an ecosystem

26
Q

Abiotic

A

No living organisms in an ecosystem

27
Q

Niche

A

the role or characteristic activity that is undertaken by an organism in an ecosystem.

28
Q

Producers

A

Plants able to grow from energy from the sun and nutrients in the soil

29
Q

Consumers

A

Consume the food made by producers

30
Q

Herbivores

A

Animals that eat producers (plants)

31
Q

Carnivores

A

Are animals that eat other animals that eat producers

32
Q

Predators

A

Consumers that kill other animals called pray

33
Q

Pray

A

The animals that get eaten by Preditors

34
Q

Omnivores

A

Animals that eat both producers and consumers

35
Q

Food Chain

A

A model that shows how energy stored in food passes from organism to organism

36
Q

Food Web

A

show how food energy moves through an ecosystem but not how many organisms are involved

37
Q

Pyramid of numbers

A

is a model of an ecosystems that represents the number of organisms consumed at each level

38
Q

Biomass

A

Is the total mass of all the organisms in an eco system

39
Q

Scavengers

A

Are organisms that feed on dead or decaying animal or plant mater

40
Q

Decomposers

A

grow on or in dead material absorbing nutrients into themselves

41
Q

Carbon Cycle

A

Carbon that circulates around an ecosystem

42
Q

Pollutants

A

Are substances that cause pollution

43
Q

Primary Succession

A

The Growth of organisms in an area that was previously bear such as rock

44
Q

Secondary Succession

A

Growth of an organisms in an area that was previously populated by other organisms

45
Q

Ecosystem Monitoring

A

The Way to check the condition of an ecosystem by comparing the results of investigations done at different times

46
Q

Indicator Species

A

help monitor the overall health of the environment

47
Q

what is a carbon cycle?

A

its when carbon circulates around an ecosystem.

48
Q

Pesticides are commonly used to control agricultural pests. In your own words, explain how this affects carnivores

A

if an animal eats the pesticides then dies another animal eats that animal then it dies too.

49
Q

what can Rachel Carson be proud of?

A

She can be proud of saving animals from pesticides.

50
Q

The carbon cycle is balanced in stable ecosystems. What events might occur to upset this balance?

A

the burning of to many fossil fuels.

51
Q

Why does the amount of water on Earth stay, more or less, the same?

A

because it consistently moves through the environment changing forms as it moves.

52
Q

Explain two ways in which cutting down forests and then burning the debris left behind can increase the level of carbon dioxide in the atmosphere.

A

because there are now less trees to absorb the carbon. And by burning the debris you are putting more carbon in the atmosphere.

53
Q

Pollution

A

Occurs when a substance is added to the environment in such a fast rate that it cant be broken down, stored, or recycled in the air land or water in a non damaging form

54
Q

Acid Rain

A

Contains higher then normal levels of acid caused by waste put into the atmosphere

55
Q

Bioaccumulation

A

is movements of pollutants up through the levels through the food chain

Science Grade 7 (9 decks)

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