Unit 1 review

Question 1

Ecosystem

Answer 1

An ecosystem is the interaction of living and non-living things in a specific region

Question 2

Environment

Answer 2

The environment refers to the entire natural world

Question 3

Habitat

Answer 3

A habitat is the given environmental conditions that a certain species needs to survive

Question 4

sybionts

Answer 4

living in close relationship with each other

Question 5

competitors

Answer 5

fighting over shared resources

Question 6

mutualism

Answer 6

benefiting both species

Question 7

symbiosis

Answer 7

living in close proximity with eachother

Question 8

Tropical rainforest

Answer 8

Average temperature
high
Average precipitation
high

Question 9

Tundra

Answer 9

Average precipitation high
average temperature
low

Question 10

Aquatic Biomes are influenced by

Answer 10

Salinity (saltiness level)
Flow
Depth

Question 11

Biome shifts

Answer 11

If temperature and precipitation patterns change, biome locations can shift

Question 12

Nitrogen fixation

Answer 12

The process of converting nitrogen gas (N2) into a usable form of nitrogen such as ammonia (NH3) or nitrate (NO3-)

Question 13

Biologically unavailable nitrogen

Answer 13

Nitrogen in the atmosphere is in a form that is not useable by plants or animals

Question 14

Nitrogen fixation done by Bacteria

Answer 14

With specialized enzymes that can break apart the strong triple bonds in nitrogen gas

Question 15

Nitrogen fixation done by fossil fuel combustion

Answer 15

Which creates synthetic nitrate-based fertilizers

Question 16

Phosphorus cycle

Answer 16

The process by which phosphorus is converted between its various forms in the environment

Question 17

Key differences between phosphorus cycle and the other three cycles
No gas phase

Answer 17

Phosphorus does not exist in a gas phase, so it does not cycle quickly through the atmosphere

Question 18

Key differences between phosphorus cycle and the other three cycles
Weathering and erosion

Answer 18

Phosphorus is released from rocks and sediments through weathering and erosion. which are slow processes

Question 19

Key differences between phosphorus cycle and the other three cycles
Phosphorus is often a limiting nutrient

Answer 19

Plants have all the other nutrients they need to grow, except for phosphorus

Question 20

Nitrogen fixation done by lightning strikes

Answer 20

Which provide the energy needed to convert nitrogen gas into a useable form

Question 21

Phosphorus reservoirs
rocks and sediments

Answer 21

Phosphorus is stored in rocks and sediments in the form of phosphate ions

Question 22

Phosphorus reservoirs
water

Answer 22

Phosphorus is carried away by runoff or wind, transporting sediments from one location to another

Question 23

Water cycle

Answer 23

The water cycle is the process by which water is converted between its various forms in the environment

Question 24

Water cycle Driven by energy from the sun

Answer 24

The water cycle is driven by the energy from the sun, which evaporates water from the surface

Question 25

Major water reservoir

Answer 25

The ocean is the major water reservoir, but it is not useable by humans

Question 26

Water cycle steps Evaporation

Answer 26

Water evaporates from the surface into the atmosphere

Question 27

Water cycle steps Condensation

Answer 27

Water vapor in the atmosphere condenses into clouds

Question 28

Water cycle steps Precipitation

Answer 28

Water falls from the atmosphere to the surface as rain or snow