Topic 9

Question 1

What is an ecosystem

Answer 1

• they’re a community of organisms along with non-living factors (abiotic) conditions

Question 2

Is temperature a biotic or abiotic factor

Answer 2

• it’s abiotic

Question 3

Factors that affect communities

Answer 3

• temp.
• amount of water
• light intensity
• levels of pollutants

Question 4

What is the factor that includes competition and predation

Answer 4

• biotic

Question 5

Name two fieldwork techniques

Answer 5

• quadrat

- belt transects

Question 6

What do belt transects measure

Answer 6

• the distrubtion of organisms along a gradient

Question 7

What is a belt transects

Answer 7

• they are quadrats laid out in a long line, forming a belt transect
• they study distribution along a gradient

Question 8

What is a trophic level

Answer 8

• they are each stages of a food chain

Question 9

What is Biodiversity

Answer 9

• the number of different species

Question 10

What is a food chain

Answer 10

• a series of organisms each dependent on the next as a source of food

Question 11

What is ‘efficiency’

Answer 11

• the efficiency of energy transfer between each trophic level

Question 12

Efficiency calculation

Answer 12

Energy transferred to next level/ energy available at previous level X100

Question 13

What is biomass

Answer 13

• mass of living biological organisms in a given area or ecosystem at a given time.
• It also refers to species biomass (the mass of one or more species)or community biomass (mass of all species in the community)

Question 14

What is biodiversity

Answer 14

• variety tofu living organisms in an ecosystem

Question 15

What is a drought

Answer 15

• period of time when an area or region experiences below-normal precipitation
• can cause reduced soil moisture or groundwater, diminished stream flow, crop damage, and a general water shortage