Science grade 7

0.0(0)
studied byStudied by 3 people
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Get a hint
Hint

Ecology

Get a hint
Hint

the study of the relationship between living organisms and their environment

Get a hint
Hint

ecosystem

Get a hint
Hint

all of the living and nonliving things interacting in an area

Card Sorting

1/49

Anonymous user
Anonymous user
flashcard set

Earn XP

Description and Tags

Grade 7/Finals

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

50 Terms

1
New cards

Ecology

the study of the relationship between living organisms and their environment

2
New cards

ecosystem

all of the living and nonliving things interacting in an area

3
New cards

community

all of the living things interacting in an area

4
New cards

population

a group of organisms of the same species living in an area

5
New cards

organism

an individual living thing

6
New cards

biotic factors

living things in an ecosystem

7
New cards

abiotic factors

nonliving things in an ecosystem

8
New cards

5 basic needs for living things to survive

  1. water

  2. food/nutrients

  3. energy

  4. gas exchange

  5. suitable habitat

9
New cards

symbiosis

a relationship between different species where at least one species benefits

10
New cards

mutualism

where both species benefit

11
New cards

commensalism

one species benefits. The other is unaffected

12
New cards

parasitism

one species benefits (parasite) and the other is harmed (host)

13
New cards

waste to biofuels

waste is used to make biofuels, such as ethanol

14
New cards

composting

-organic material, such as food and yard waste is returned to the soil by decomposers

-least impact on the environment

15
New cards

niche

a role an organism plays in its community

16
New cards

producer

makes its own food using energy from the sun and nutrients from the soil

17
New cards

consumer

feeds on other living things

18
New cards

carnivore

feeds on other consumers

19
New cards

herbivores

feeds on producers

20
New cards

omnivores

feeds on both producers and consumers

21
New cards

decomposer

grows on or in dead and waste material from living things

-break down (decompose) the material, absorbing nutrients.

22
New cards

scavenger

feeds on dead/decaying organisms

23
New cards

food chain

a pathway that shows how energy moves from one living things to another

24
New cards

food web

the interconnected food chains in an ecosystem

-one change can impact the entire food web

25
New cards

water cycle

the natural cycle of water through the environment

26
New cards

evaporation

water changes from liquid water to water vapour in the air

27
New cards

transpiration

plants release water vapour into the air

28
New cards

condensation

water vapour in the air condenses into liquid water in clouds

29
New cards

precipitation

water falls to earth as rain or snow

30
New cards

surface runoff

water movement above ground

31
New cards

subsurface runoff

water movement and storage below ground.

water is also stored in glaciers, oceans and lakes

32
New cards

carbon cycle

the natural cycle of carbon through the environment

33
New cards

cellular respiration

living things release C02

34
New cards

combustion

burning releases C02

35
New cards

photosynthesis/plants

plants take in C02 and give out 02

36
New cards

quadrat

a staked out area of an ecosystem, studied by ecologists

-the more quadrats studied, the more accurate the results

37
New cards

bioinvasion

when a non-native species is introduced to an ecosystem. the invasive species multiplies quickly, harming the ecosystem

38
New cards

biological control

a species that is deliberately introduced into an ecosystem to prey on a pest

39
New cards

predator

a carnivore that hunts other animals for food

40
New cards

prey

an animal that is hunted by a predator

41
New cards

competition

when living things compete for limited resources such as space, food and water

42
New cards

weather

changing weather patterns and natural disasters can affect populations

43
New cards

ecological succession

the formation of a new community over time

  1. pioneer species (small)

  2. intermediate species (medium)

  3. climax community (large, not easily replaced)

44
New cards

pollution

occurs when a pollutant is added to the environment at such a fast rate, that it cannot be broken down, storewd or recycled

45
New cards

biomagnification

when chemicals become more concentrated going up the food chain (the top carnivore is most affected)

46
New cards

threatened

a species numbers are declining, but it is not in immediate danger

47
New cards

endangered

a species that is so rare that it is in immediate danger of becoming extinct

48
New cards

extinct

a species that no longer exists on earth

49
New cards

when do scientists monitor

  • before a disturbance

  • after a disturbance

  • when an ecosystem is fragile

50
New cards

ecological footprint

a measurement of the impact our lifestyle has on the environment