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Sixth Grade (Grade 6) Biology Questions

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Grade 6 Food Chains and Webs
Some beetles break down the remains of dead animals. Some mushrooms break down the remains of dead trees. These actions most benefit plants by what?
  1. returning nutrients to the soil.
  2. releasing oxygen into the air.
  3. making space for new animals.
  4. decreasing the population of herbivores.
Grade 6 Biomes
What biome has some of the richest and most fertile soil in the world?
  1. taiga.
  2. tundra.
  3. grassland.
  4. desert.
Grade 6 Food Chains and Webs
A connected group of food chains is a(n)                            .
  1. habitat.
  2. food web.
  3. ecosystem.
  4. predator/prey relationship.
Grade 6 Food Chains and Webs
Animals that eat other animals are                .
  1. omnivores.
  2. biomes.
  3. herbivores.
  4. carnivores.
Grade 6 Communities, Populations, and Ecosystems
Place the categories in order from smallest to largest.
  1. biosphere, ecosystem, community, population, organism
  2. organism, population, community, ecosystem, biosphere
  3. biosphere, population, ecosystem, community, organism
  4. organism, community, ecosystem, population, biosphere
Grade 6 Symbiosis
The relationship in which two species both benefit is                .
  1. commensalism.
  2. a niche.
  3. mutualism.
  4. an ecosystem.
Grade 6 Food Chains and Webs
Plants are necessary for life on Earth.
  1. True
  2. False
Grade 6 Biomes
What biome can be very hot or cold and has very little rain?
  1. tundra
  2. desert
  3. savanna
  4. tropical rain forest
Grade 6 Symbiosis
A symbiotic relationship in which both organisms benefit is                .
  1. mutualism.
  2. commensalism.
  3. competition.
  4. parasitism.
Grade 6 Cell Structure and Function
All cells look exactly the same.
  1. True
  2. False
Grade 6 Biotic and Abiotic
Biotic factors are the                   in an ecosystem.
  1. nonliving factors
  2. living factors
Grade 6 Cell Structure and Function
What is the function of the cell wall?
  1. tells the cell what to do
  2. lets water pass in and out
  3. lets molecules pass in and out
  4. gives the plant structure and support
Grade 6 Symbiosis
What is an animal that hunts and eats other animals?
  1. herbivore
  2. predator
  3. prey
  4. niche
Grade 6 Communities, Populations, and Ecosystems
An ecosystem is a community of living organisms and their                 environment.
  1. habitat
  2. nonliving
  3. niche
  4. physical
Grade 6 Biomes
Which biome has the greatest diversity of living things?
  1. grassland
  2. taiga
  3. rainforest
  4. desert
Grade 6 Communities, Populations, and Ecosystems
What is an ecosystem?
  1. something that affects a certain population
  2. all living and nonliving things in a particular area
  3. an increase in the Earth's temperature
  4. organisms that make their own food
Grade 6 Communities, Populations, and Ecosystems
What is the study of the relationship of plants and animals with their physical environment?
  1. biosphere
  2. ecosphere
  3. ecology
Grade 6 Anatomical Organization
Organs in the body work together to form
  1. tissues.
  2. systems.
  3. cells.
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