B2: 1-5

Question 0

What do pyramids of biomass show?

Answer 0

The dry mass of living material at each stage of the food chain.

Question 1

Explain what a tropic level is

Answer 1

Each bar on the pyramid of numbers or biomass

Question 2

Why is the pyramid of biomass difficult to construct?

Answer 2

Some organisms feed on organisms from different tropic levels.

Measuring dry mass os difficult because it involves removing all the water from the organism.

Question 3

How is energy lost from each tropic level?

Answer 3

Through respiration,
Egestion
Excretion

Question 4

How much energy is lost from each tropic level?

Answer 4

Up to 90%

Question 5

What is the formula for the efficiency of energy transfer?

Answer 5

Energy used for growth
DIVIDED BY
energy input

Question 6

What is an advantage of using pyramids of biomass?

Answer 6

Better way of representing different trophic levels.

Question 7

What are the best conditions for microbes to survive?

Answer 7

Food
Oxygen
Suitable temperature 
Moisture 
Suitable pH

Question 8

Do microbes die when they dont have the right conditions ?

Answer 8

No they slow down

Question 10

Explain carbon sinks.

Answer 10

Sea animal gain carbon, in their shells, from digesting plants.
When they die it is difficult for them to decay and they sink to the bottom of the ocean.
The fragments get crushed to form rocks such as limestone and chalk.
Eventually these rocks reach the surface get weathered and the carbon gets released back into the atmosphere.

Question 11

Name all the sections of classification.

Answer 11

Kingdom, Phylum, Class, Order, Family, Genus, Species,