4th 9 Week Exam 7th Grade

Sharks are messy eaters that swim around all day with a small Remora fish attached to their undersides. The Remora eats any food that the shark may drop. The Remora does nothing for the shark. This is an example of…

• Mutualism

• Commensalism

• Parasitism

• Competition

Grace is exploring a park and notices mammals, fish, birds, and plants, as well as the sun, soil, air, and water all around her. What word best describes all of these components in the environment?

• Abiotic

• Ecosystem

• Community

• Biosphere

Rohan is studying the environment and wants to understand its structure. He learns that there are five levels of organization, from the smallest to the largest. Which of the following correctly lists these five levels in order?

• Organism, population, biosphere, ecosystem, community

• Organism, population, biotic elements, abiotic elements, community

• Organism, population, community, ecosystem, biosphere

• Organism, population, biosphere, abiotic elements, ecology

Charlotte is curious about how animals, plants, and other living things interact with each other and with their environment in the forest near her home. The study of this is called ___________.

• Ecology

• Community studies

• Symbiosis

• Social studies

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Hannah sees a bird eat a worm in her backyard. Who is the predator?

• Worm

• The bird and the worm

• Bird

• Neither the bird or the worm

During a summer storm, water floods a prairie where Elijah is studying the local ecosystem. What is an example of an abiotic element that may change the area?

• Introducing a new type of grass to the prairie

• Water flooding a prairie

• Two bird species competing for nest habitat

• Uncontrollable mold growth on trees

Ava enjoys eating a variety of meats, fruits, and vegetables. What type of eater is Ava?

• Producers

• Omnivores

• Carnivores

• Herbivores

On a wildlife reserve, scientists are studying the balance between prairie dogs and coyotes. In order for the prairie dog population to survive, how many prairie dogs are needed compared to coyotes?

• Fewer prairie dogs than coyotes

• Many more prairie dogs than coyotes

• About the same number of prairie dogs as coyotes

• There is no relationship between the number of prairie dogs and coyotes

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When a parasitic tapeworm gets inside a dog’s intestine to obtain food, who is the host?

• The worm

• The dog

• The decomposer

• The producer

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Benjamin observes that grass is eaten by a prairie dog, and the prairie dog is eaten by a coyote during his nature walk. This is an example of ________.

• An abiotic element

• An omnivore

• An herbivore

• A food chain

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