Unit 3 Pt1 (Ecosystems, Distribution Of Organisms, Photosynthesis)

Question 1

What is a species

Answer 1

A group of living things that are able to breed to produce fertile offspring

Question 2

What is biodiversity

Answer 2

The variety of living things in a defined area

Question 3

What is a population

Answer 3

All the organisms of the same species living in the same area

Question 4

What is a habitat

Answer 4

The place where and organism lives

Question 5

What is a producer

Answer 5

A plant at the beginning of a food chain

Question 6

What is a consumer

Answer 6

An animal in a food chain that eats something else (another animal or plant)

Question 7

What is a herbivore

Answer 7

An organism that only eats plants

Question 8

What is a carnivore

Answer 8

An organism that only eats animals

Question 9

What is an omnivore

Answer 9

An organism that eats both plants and animals

Question 10

What is a predator

Answer 10

And organism that hunts prey

Question 11

What is prey

Answer 11

An organism that is hunted by a predator

Question 12

What is a community

Answer 12

All the organisms in an ecosystem

Question 13

What is a niche

Answer 13

The role an organism plays within its community

Question 14

What is intraspecific competition

Answer 14

When individuals of the same species compete for all of the same resources they need

Question 15

What is interspecific competition

Answer 15

When individuals of different species compete for one or more of the same resources they require

Question 16

What resources do plants compete for

Answer 16

Light water and space

Question 17

What resources do animals compete for

Answer 17

Food water shelter and mates

Question 18

What do the arrows in a food chain/web represent

Answer 18

The flow of energy

Question 19

What is a biotic factor

Answer 19

A living factor that influences an ecosystem

Question 20

What is an abiotic factor

Answer 20

A non living factor that influences an ecosystem

Question 21

What is a quadrat

Answer 21

Equipment used to estimate the number of small animals in a given location

Question 22

What is a pitfall trap

Answer 22

Equipment used to count and estimate the number of living small animals in a given location

Question 23

What is an important indicator species

Answer 23

Species that by their presence or absence indicate environmental quality/levels of pollution

Question 24

What are 4 examples of abiotic factors

Answer 24

Light intensity, moisture, pH, temperature

Question 25

What are 4 examples of a biotic factor

Answer 25

Disease, food availability, grazing, predation

Question 26

What are factors that may increase biodiversity

Answer 26

Increased moisture levels, warm temperatures, good food availability

Question 27

Factors that may decrease biodiversity

Answer 27

Extremes of temperature, over grazing, too many predators

Question 28

What instrument would u use to measure light intensity

Answer 28

A light meter

Question 29

What would u use to measure the soil moisture

Answer 29

Moisture meter

Question 30

How would u measure the ph of the soil

Answer 30

With a ph meter

Question 31

How to minimise error while using a light meter

Answer 31

Stand to one side to prevent casting a shadow casting on the sensor

Question 32

How to avoid error while using a moisture meter

Answer 32

Dry the probe between readings

Question 33

How to avoid error while using a ph meter

Answer 33

Dry probe between readings

Question 34

What is photosynthesis

Answer 34

A two stage process in plants to make sugar from water and carbon dioxide using light energy

Question 35

What are light reactions

Answer 35

The first stage of photosynthesis

Question 36

What is chlorophyll

Answer 36

A chemical found in chloroplasts that is able to trap light energy

Question 37

What is a chloroplast

Answer 37

Structures in plant cells that contain chlorophyll

Question 38

What it ATP

Answer 38

A form of chemical energy

Question 39

What is carbon fixation

Answer 39

The second stage of photosynthesis

Question 40

Why is sugar converted to to starch

Answer 40

For storage

Question 41

Why is sugar converted to cellulose

Answer 41

For structural uses (cell walls)

Question 42

What is a limiting factor

Answer 42

A factor or substance that prevents a chemical reaction from happening quicker

Question 43

What is the word equation for photosynthesis

Answer 43

Light energy Carbon dioxide + water —————> sugar + oxygen

Question 44

What is stage 1 of photosynthesis

Answer 44

The light energy from the sun is trapped by chlorophyll in the chloroplasts some of this light energy is converted into chemical energy which is used to generate ATP the remaining light energy is used to split water into oxygen and hydrogen the oxygen is diffused from the cell

Question 45

What is stage 2 of photosynthesis

Answer 45

The ATP and hydrogen generated from the light reactions and carbon dioxide from the air are combined. They are converted into sugar during a series of enzyme controlled reactions

Question 46

What are the 3 uses to the sugar made by photosynthesis

Answer 46

Respiration, storage as starch, structural as cellulose

Question 47

Examples of limiting factors

Answer 47

Temperature, light intensity, carbon dioxide concentration