Ecology Unit SNC1w 1.1-1.6

Atmosphere is

• a thin layer of gases around the Earth

• 20 km thick

• 78% nitrogen, 21% oxygen, 0.9% argon & trace amounts of other gases

• all three are correct for atmosphere

Answer explanation

Lithosphere ....

• thin layer of gases

• mountains, ocean floors, continents

• water on, above and below the Earth's surface

Answer explanation

Also called Geosphere!

Tags

NGSS.MS-ESS2-3

3% of all water on Earth is in the oceans.

• true

• false

Answer explanation

97% is in the oceans!! (and it is saltwater)

3% is freshwater (polar caps, glaciers and groundwater)

Tags

NGSS.MS-ESS2-4

The 'life-zone' around the Earth where all living things exist.

• hydrosphere

• biosphere

• lithosphere

• atmosphere

Answer explanation

Bio....means "life" or "living"

Tags

NGSS.MS-LS2-2

The study of the interrelationships between all the biotic and the abiotic components within the biosphere is...

• ecosystem

• chemistry

• ecology

Answer explanation

Ecology is the study of the relationships between living organisms (including humans) and their physical environment.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

All the living organisms in an area and their non-living environment.

• habitat

• ecosystem

• community

Answer explanation

An ecosystem is geographic area where plants, animals, and other organisms (& weather and landscapes) work together to form a bubble of life.

Tags

NGSS.MS-LS2-3

Biotic factors are

• Living things, their remains, and the features associated with their activities (like nests)

• Non-living characteristics of an ecosystem (like water and rocks)

Answer explanation

biotic = consisting of living things

Abiotic factors would be...

• 
• 

Answer explanation

Abiotic = Non-living

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

All the members of the same species that live in the same ecosystem ...

• population

• community

• habitat

Answer explanation

Example of a population: a herd of zebras living together in the African savanna

Tags

NGSS.MS-LS2-4

All the living organisms, from all the populations, that live in the same ecosystem ...

• population

• community

• habitat

Answer explanation

Community - a group of different species of animals that live in the same geographic area and interact with each other,

Tags

NGSS.MS-LS2-2