life on earth

Question 1

what is an ecosystem?

Answer 1

a natural biological unit composed of habitats and communities

Question 2

what is a habitat?

Answer 2

the place where an organism lives

Question 3

what does abiotic mean?

Answer 3

a non-living factor that effects an ecosystem

Question 4

name 4 abiotic factors?

Answer 4

light intensity, soil moisture, pH level, temperature

Question 5

what is a food chain?

Answer 5

the feeding relationships between different organisms

Question 6

what is a food web?

Answer 6

a set of interlocking food chains

Question 7

what is the definition of producer?

Answer 7

able to produce their own food by converting the suns light energy into chemical energy

Question 8

what is the definition of primary consumer?

Answer 8

plant eating consumer energy is transferred from the plant to the animal

Question 9

what is the definition of secondary consumer?

Answer 9

when the primary consumer is eaten by the secondary consumer

Question 10

what are biotic changes?

Answer 10

changes related to how living things interact with one another such as competition for food, disease and predation

Question 11

4 examples of biotic changes?

Answer 11

food, disease, predation, invasive species

Question 12

what is the effect of biotic and abiotic factors on organisms?

Answer 12

changes in biotic and abiotic factors affect the distribution of organisms in an ecosystem

Question 13

state 2 types of adaptations in living things and what they do

Answer 13

a physical or behavioural change that develops over time which allows an organism better survival in its ecosystem

Question 14

state the meaning of biodiversity

Answer 14

diversity among and within plant and animal species in an environment

Question 15

why is biodiversity important?

Answer 15

provides different resources

Question 16

what is biodiversity important?

Answer 16

provides different resources

Question 17

why is economic diversity important?

Answer 17

food, medicine and raw materials

Question 18

what is aesthetic important?

Answer 18

so it looks nice

Question 19

when is innate behaviour present?

Answer 19

at birth

Question 20

learned behaviour is…

Answer 20

developed throughout life

Question 21

what do behavioural adaptations help animals to do?

Answer 21

survive

Question 22

all living organisms need certain chemicals to stay healthy what are these?

Answer 22

nutrients

Question 23

what do plants and animals need nitrogen?

Answer 23

to make proteins

Question 24

nutrients and nitrogen must be what in the environment otherwise they’ll run out?

Answer 24

recycled

Question 25

when plants and animals die the nutrients inside them are broken down by organisms called what?

Answer 25

decomposers

Question 26

nitrogen gas turns into nitrate and creates what?

Answer 26

nitritacation by bacteria

Question 27

what does the arrow in a food chain mean?

Answer 27

direction of energy flow