___ is the process during which liquid water changes into water vapor.
Precipitation
Evaporation
Nitrogen fixation
Condensation
Which best represents a food chain?
fox → grass → rabbit → Sun
Sun → grass → rabbit → fox
Sun → rabbit → fox → grass
Predict what would happen if all the nitrogen-fixing bacteria in an ecosystem were removed.
Plants and animals wouldn't receive nitrogen compounds and this could cause disease and death among plants. This could lead to decline in animal populations.
What organisms help break down dead leaves in an ecosystem?
Detritivores
Carnivores
Herbivores
Which is true of energy in ecosystems?
It never changes form
It is both created and destroyed
It flows in one direction
Which process helps keep temperatures on Earth from becoming too hot or too cold?
Global warming
Greenhouse effect
Condensation
Which organism might you expect to find a trophic level I?
Frog
Grass
Fox
The process that changes atmospheric nitrogen into compounds usable by living things is called ___
Condensation
Evaporation
Precipitation
Nitrogen fixation
Process using chemical energy in matter to make food.
Photosynthesis
Chemosynthesis
Nonliving things in an ecosystem.
Biotic factor
Abiotic factor
During the carbon cycle, __ take in carbon dioxide from the atmosphere.
Decomposers
Animals
Plants
Model showing the amount of energy available in each step of a food chain.
Energy pyramid
Food chain
Food web
Define condensation in your own words.
Condensation is when water vapor changes into a liquid
Model of energy transfer showing how the food chains in a community are interconnected.
Food chain
Energy pyramid
Food web
Living things in an ecosystem.
Abiotic factor
Atmosphere
Climate
Biotic factor
Series of chemical reactions that convert light energy, water, and carbon dioxide into the food-energy molecule glucose and give off oxygen.
Photosynthesis
Chemosynthesis
Distinguish between climate and atmosphere.
Climate describes the average weather conditions in an area over time while the atmosphere is the layer of gasses that surrounds Earth.
Which step in the water cycle occurs in plants?
Precipitation
Condensation
Transpiration
___ is when water falls from clouds to Earth’s surface.
Evaporation
Nitrogen Fixation
Condensation
Precipitation
Model showing how energy flows in an ecosystem.
Food web
Energy pyramid
Food chain
Describe an interaction between a living thing and a nonliving thing in an ecosystem.
Elephants drinking water, lions laying on the soil, and people breathing oxygen.
Average weather conditions in an area over time.
Atmosphere
Ecosystem
Biotic factor
Climate
Living and nonliving things in a given area.
Ecosystem
Atmosphere
Abiotic factor
Biotic factor
How might a flamingo interact with nonliving things in their environment?
The flamingo might drink water, breathe oxygen from the atmosphere, warm itself in the sunlight, and stand on soil.
Layer of gasses surrounding Earth.
Climate
Ecosystem
Atmosphere
Which is a biotic factor in an ecosystem?
A plant living near a stream
The angle of the Sun
The amount of rainfall
A person who ate a salad made of lettuce, tomatoes, cheese, and ham is a(n) __.
Omnivore
Herbivore
Carnivore
Which is true of the amount of matter in ecosystems?
It increases over time
It decreases over time
It remains constant
The process during which water vapor changes into a liquid is called
Precipitation
Nitrogen fixation
Evaporation
Condensation
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