IB ESS

Autotrophs are organisms that

• rely on other organisms for their energy & food supply.

• consume plant & animal remains and other dead matter.

• use energy they take in from the environment to convert inorganic molecules to organic molecules.

• obtain energy by eating only plants.

Tags

NGSS.MS-LS1-6

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The total mass of living tissue at each trophic level can be shown in a(n)

• energy pyramid

• pyramid of numbers

• biomass pyramid

• biogeochemical cycle

According to the food web shown, what would occur if there were a drastic decrease in the squirrel population?

• There would be fewer vultures

• There would be more nuts and seeds.

• There would be fewer vultures & there would be more nuts and seeds.

• There would be more grass.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

In a forest ecosystem, a food chain might look like this:
green plants → rabbit → fox → panther

If the green plants are destroyed in a forest fire, which short-term effect will this have on the organisms in this food chain?

• There would be fewer rabbits for the foxes to eat. 

• The panthers would have to begin to eat green plants.

• There would be an increase in the fox population

• There would be more green plants for the rabbits to eat

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

At which trophic level can you find an herbivore?

• 1st Level

• 2nd Level

• 3rd Level

• 4th Level

Tags

NGSS.MS-LS2-3

__________ primary productivity is the total amount of energy that producers convert to chemical energy in organic molecules per unit of time.   

• Net

• Total

• Gross

• None of the above

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.

• It shows how sunlight flows within an ecosystem.

• They show what direction the energy is flowing between organisms. 

• They represent how water is transferred within a habitat.

Tags

NGSS.MS-LS2-3

All of the production by photosynthetic organisms in a defined area over a specified time period is known as

• Gross Productivity

• Net Productivity

• Photosynthesis + Respiration

• Photosynthesis - Respiration

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The most important abiotic factors when studying biomes are...

• Food and Water

• Rain and Sunlight

• Temperature and Oxygen

• Precipitation and Temperature 

__________ primary productivity = the organic materials that remain after photosynthetic organisms in the ecosystem have used some of these compounds for their cellular energy needs (cellular respiration).

• Gross

• Total

• Net

• Secondary

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3