IB ESS Topic 2 - Ecology

How does energy enter an ecosystem?

• sunlight

• soil

• animals

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

An important abiotic factor in ALL ecosystems is the 

• ecology
• climate
• plants
• animals

Tags

NGSS.MS-LS2-3

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.

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

Tags

NGSS.MS-LS2-3

Why are food chains, such as the one shown, limited to 4-5 organisms?

• There are not more organisms in the ecosystem
• Organisms must share resources
• Energy transfers are inefficient
• They are only limited when organisms are living on land.

Tags

NGSS.MS-LS2-3

At which trophic level can you find an herbivore?

• 1st Level

• 2nd Level

• 3rd Level

• 4th Level

Why are decomposers necessary?

• Because we compose too much...

• To take basic materials and make them more complex...

• To take complex materials and break them down to basic stuff...

• So demusic can be really good...

Tags

NGSS.MS-LS2-3

__________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
• Primary
• Net
• Secondary

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The rate at which producers convert radiant energy into chemical energy

• trophic level

• net primary productivity

• gross primary productivity

• photosynthesis

Tags

NGSS.MS-LS1-6

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

• Net

• Total

• Gross

• Secondary

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3