life on earth

Question 1

the place where an organism lives is its

Answer 1

habitat

Question 2

all of the organisms of one species of one species in a habitat is a

Answer 2

population

Question 3

all the living organisms in a habitat are known as

Answer 3

community

Question 4

what do we call a group of organisms that can interbreed to produce fertile offspring?

Answer 4

a species

Question 5

the variety of living things in a ecosystem is known as

Answer 5

biodiversity

Question 6

what makes an ecosystem?

Answer 6

all the living things and their environment

Question 7

what is a predator?

Answer 7

a animal that hunts another animal for its food

Question 8

what do we call animals that are hunted by a predator?

Answer 8

prey

Question 9

what is the other name for a green plant (because it can make its own food)

Answer 9

producer

Question 10

what do we call animals that obtain food by feeding on other organisms?

Answer 10

consumer

Question 11

what is the term for ‘the role an organism plays in its community’?

Answer 11

niche

Question 12

what do the arrows in a food chain represent?

Answer 12

the direction of energy flow from one organism to another

Question 13

why do food chains always start with green plants?

Answer 13

because they are producers

Question 14

name 3 ways that energy can be lost from a food chain

Answer 14

it is used for movement
it is used for heat
faeces

Question 15

what diagram shows a number of food chains linked in an ecosystem?

Answer 15

a food web

Question 16

what does a pyramid of numbers show?

Answer 16

it shows the number of organisms at each stage

Question 17

what does a pyramid of energy show?

Answer 17

represents the energy available at each stage of a food chain

Question 18

what occurs in ecosystems when resources are in short supply?

Answer 18

competition

Question 19

name the type of competition that occurs amongst individuals of different species

Answer 19

interspecific competition

Question 20

name the type of competition that occurs amongst individuals of the same species

Answer 20

intraspecific competition

Question 21

name three abiotic factors

Answer 21

PH
moisture
temperature
light intensity

Question 22

name three biotic factors

Answer 22

disease
food availability
predators
competition for resources
grazing

Question 23

how can you minimise error while using a moisture meter?

Answer 23

wipe the probe in between each sample

Question 24

name the equipment used to sample plants

Answer 24

quadrant

Question 25

how should quadrants be placed on the ground?

Answer 25

randomly

Question 26

name the equipment used to sample ground crawling insects

Answer 26

pitfall traps

Question 27

describe a potential error when using a pitfall trap

Answer 27

trap is not level with the ground so therefore the organisms dont fall in

Question 28

what is it called when measurements are taken along a line within an area

Answer 28

a transect

Question 29

what is the equation for photosynthesis

Answer 29

carbon dioxide +water-(light + chlorophyll)- sugar + oxygen

Question 30

name the two stages of photosynthesis

Answer 30

light reaction and carbon fixation

Question 31

what is the energy change in photosynthesis?

Answer 31

light energy is converted into glucose

Question 32

name the green pigment that traps light energy for photosynthesis

Answer 32

chlorophyll

Question 33

what two chemicals are made in the light reactions and then used in carbon fixation

Answer 33

ATP and hydrogen

Question 34

what is the main product of the carbon fixation?

Answer 34

glucose

Question 35

what are the three fates of glucose made by photosynthesis?

Answer 35

used for respiration convert to starch for storage convert it to cellulose to build up the cell wall

Question 36

name the three limiting factors of photosynthesis

Answer 36

temperature light intensity carbon dioxide concentration

Question 37

what effect will increasing the concentration of carbon dioxide have on the rate of photosynthesis?

Answer 37

increase the rate of photosynthesis

Question 38

what is the effect of low temperature on the rate of photosynthesis

Answer 38

reduces the rate of photosynthesis

Question 39

explain how high temperatures can reduce or stop photosynthesis?

Answer 39

enzymes become denatured

Question 40

if an underwater plant produces lots of bubbles, what gas would this be and what is this gas a measurement of?

Answer 40

the measurement of the rate of photosynthesis and the gas would be carbon dioxide

Question 41

why is the demand for food increasing?

Answer 41

because the human population is increasing rapidly

Question 42

name two types of chemical that farmers can use to increase crop yield

Answer 42

fertilisers and pesticides