IB ESS Topic 8

What is an organism that breaks down & absorbs dead matter so nutrition can be recycled into the soil?

• Consumer

• Decomposer

• Producers

• Scavenger

Which of the following is most likely to occupy the second trophic level of a food chain?

• carnivore

• herbivore

• detritivore

• scavenger

Tags

NGSS.MS-LS2-3

When energy is wasted or lost, it is in the form of what?

• Carbon Dioxide

• Heat

• Water

Tags

NGSS.MS-PS1-4

How much energy gets passed from one organism to another during a feeding relationship?

• 90%

• 25%

• 10%

Tags

NGSS.MS-LS2-3

There are 40,000g of biomass energy available on trophic level one. How much energy is available for the tertiary consumer?

• 400,000g

• 4,000g

• 400g

• 40g

• 4g

Tags

NGSS.MS-LS2-3

Largest number of individuals of a population that a environment can support

• population 

• limiting factor

• carrying capacity

• none of these

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.

• There would be a decrease in the grass/flowers population.

• There would be a decrease in the mice population.

• There would be an increase in the grass/flowers population.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What is a limiting factor?

• any factor that helps a living thing grow

• the opposite of multiplication

• any factor that limits population growth

• any factor that makes a population grow

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A species which serves as an early warning sign that a community or ecosystem is being altered or degraded.

• Keystone species

• Native Species

• Indicator Species

• Alarm Species

A species in an ecosystem that plays a central role in the health of that ecosystem, and whose removal may cause the collapse of the ecosystem, is called a(n):

• Generalist

• Indicator

• Specialist

• Keystone

Tags

NGSS.MS-LS2-4