G7 U5 Ecological Pyramids and Trophic Level

Which of the following is an example of a detritivore?

• Deer

• Mushroom

• Earthworm

• Bacteria

Around 10% of the energy available at one level of a food chain is transferred to the next level. If 1000 kJ of energy is available at the level of the producer and there are total of 4 levels in the food chain, how much energy would be transferred to the top predator? (Producer is the first level)

• 1000

• 100

• 10

• 1

Tags

NGSS.MS-LS2-3

Why most food chains have at the most 4 or 5 levels?

• If there are more levels, too little energy will be transferred to the top level

• There are not enough organisms to make up so many levels

• The variety of organisms are not great enough to make so many levels

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

What does a pyramid of numbers compare?

• the number of individual organisms at each trophic level

• the number of individuals in each population

• the number of predators and prey in an ecosystem

• the number of different populations at each trophic level

What level often has the most number of organisms in a pyramid of numbers?

• the bottom level (producers)

• the second level (herbivores)

• the third level (primary carnivores)

• the top level (secondary carnivores)

Tags

NGSS.MS-LS2-3

Which of the following examples would result in an inversion of a pyramid of numbers?

• a tree with thousands of spiders

• a forest of trees with a small herd of deer

• a tree with a spotted owl

• a forest of trees with a pack of wolves

Why are energy pyramids never inverted?

• because energy is always lost from one trophic level to the next

• because energy is always gained from one trophic level to the next

• because energy cannot be measured as it transfers from one trophic level to the next

• because it just never is

Tags

NGSS.MS-LS2-3

As energy flows through the food chain, what happen to the amount of energy retained by each trophic level?

• It decreases significantly

• It increases significantly

• It increases slightly

• It decreases slightly

What does an energy pyramid compare?

• the total amount of energy transferred in each trophic level

• the total amount of energy lost in each trophic level

• the total amount of energy used in each trophic level

• the total amount of energy produced at each trophic level

Tags

NGSS.MS-LS2-3

All food webs and food chains begin with _________________.

• primary consumer
• producers
• secondary consumers
• predators

Tags

NGSS.MS-LS2-3