energy in ecosystems

Question 1

what do the arrows in a food chain represent

Answer 1

the direction of energy flow/how energy is transferred from one organism to another

Question 2

what is a food web

Answer 2

they show more complex interactions in an ecosystem

Question 3

how can you predict the effects on population

Answer 3

The increase or decrease in the population of one organism can have effects on the populations of other organisms in a
food web. This is because each organism is interconnected.

Question 4

energy loss - Not all the energy is passed from one level of the food chain to the next. About 90% of energy may be lost from each
level as?

Answer 4

movement
heat
waste matter

Question 5

whats a pyramid of energy

Answer 5

A pyramid of energy shows the total quantity of available energy stored in the biomass of organisms at each level in the
food chain of an ecosystem.

Question 6

what is competition

Answer 6

Competition will occur between organisms when their niches overlap. This can occur when they try to use the same
resource or a resource comes into short supply.

Question 7

what types of things do animals compete for

Answer 7

food
habitat
water
mates

Question 8

what types of things do plants compete for

Answer 8

light
water
minerals
space

Question 9

what are the two types of competition

Answer 9

intraspecific and interspecific

Question 10

what is intraspecific competition

Answer 10

The competition which occurs between organisms of the same species for the same resources.

Question 11

what is interspecific competition

Answer 11

The competition which occurs between organisms of different species for a shared resource.

Question 12

which competition is more intense and why

Answer 12

Intraspecific competition is more intense than interspecific competition due to
individuals occupying the same niche. This means that they are competing for the
exact same resources.