Chapter 9, 7th Grade: Question Preview (ID: 31090)

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Which is NOT an abiotic factor?
a) air b) water c) pigeons d) soil
Land biomes are called
a) terrestrial biomes b) aquatic biomes c) earthly biomes d) surface biomes
What can cause an increase in population size?
a) organisms dying b) organisms moving into an area c) organisms moving out of an area d) none of the above
Which is a limiting factor?
a) water b) space c) disease d) all of the above
The physical place where a population lives is called its
a) habitat b) niche c) population d) hood
Which is an example of a parasitic relationship?
a) a clownfish and sea anemone b) a bee and a flower c) a flea and a dog d) a barnacle and a sea turtle
T/F: Energy returns to its source (or cycles) in an ecosystem.
a) True b) False c) d)
The process in which organisms use chemicals to make food energy is called
a) photosynthesis b) chemosynthesis c) autosynthesis d) hydrosynthesis
Which organisms only eat other consumers?
a) herbivores b) omnivores c) carnivores d) detritivores
Detritivores are organisms that eat
a) only producers b) only consumers c) both producers and consumers d) dead plants and animals
T/F: Each stage of a food chain has less available food energy than the last one.
a) True b) False c) d)
What shows the amount of energy available at each step of a food chain?
a) food chain b) food web c) food pyramid d) food cube
When water vapor is released by plants, it is called
a) precipitation b) condensation c) evaporation d) transpiration
Plants release ___ as a waste product of photosynthesis.
a) carbon dioxide b) oxygen c) water vapor d) nitrogen
Producers make a food source called
a) glucose b) stomata c) chlorophyll d) chloroplast
How do humans contribute to the carbon cycle?
a) They breathe out carbon dioxide b) They burn fossil fuels c) When they decompose, the carbon is returned to the environment. d) All of the above.
T/F: Environmental changes can be slow or rapid.
a) True b) False c) d)
The largest number of individuals of one species that an ecosystem can support over time is called
a) limiting factors b) climax community c) carrying capacity d) threshold
A relationship in which two organisms benefit is called
a) mutualism b) commensalism c) parasitism d) benefitism
Which organisms cannot make their own food and get energy by eating other organisms?
a) producers b) consumers c) chemosynthetic organisms d) none of the above
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