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- 1. Multiple Choice
Examples of some organisms found in a forest ecosystem are shown. How would energy MOST likely flow between the organisms?grasshopper, frog, snake, hawkhawk, snake, grasshopper, frogsnake, grasshopper, frog, hawkfrog, grasshopper, hawk, snake - 2. Multiple ChoiceWhat does a plant need to make sugar through photosynthesis?soil, water, and oxygenoxygen, sunlight, and soilcarbon dioxide, sunlight, and soilsunlight, water, and carbon dioxide
- 3. Multiple ChoiceWhich BEST describes how earthworms improve soil as they eat dead plant material?They make the soil clean.They keep disease out of the soil.They recycle nutrients into the soil.They remove extra water from the soil.
- 4. Multiple ChoiceWhich of these is the primary source of energy in food webs?soilsunlightproducerconsumer
- 5. Multiple ChoiceGreg was studying a forest ecosystem. He placed some of the animals he studied in an energy pyramid. Based on Greg’s energy pyramid, which organisms contain the MOST energy?the wolvesthe weaselsthe beetlesthe trees
- 6. Multiple ChoiceAnimals depend on plants for many things, including food. What do plants depend on from animals?energy for photosynthesispest controlcarbon dioxideoxygen
- 7. Multiple ChoiceAs the hawk population increases in an ecosystem, the deer mouse population will MOST likely decrease as a result ofdecrease in food sourceincrease in disease.increase in predators.decrease in habitat.
- 8. Multiple ChoiceIn this model of a food chain, which organism is a producer?raccoonmousegrasshoppergrass
- 9. Multiple ChoiceThe diet of a brown bear includes roots, grasses, berries, nuts, fish, insects, and mammals. Based on this description, in what category is a brown bear?carnivoreherbivoreomnivoredecomposer
- 10. Multiple ChoiceWhich organisms make energy available to all other organisms in a food chain?producersdecomposersconsumersscavengers
- 11. Multiple ChoiceWhich is a process that converts sunlight energy into a compound that stores chemical energy?phototropismphotosynthesisrespirationpollination
- 12. Multiple ChoiceJackie learned that animals compete with each other for resources to stay alive. She studied a food web of organisms that live in a marsh. Which organisms are competing with each other for the same food source?hawk and snakecricket and frogsnake and cricketshrew and grasshopper
- 13. Multiple ChoiceAll organisms depend on the transfer of energy to survive. Which BEST shows the energy transfer between animals in a shoreline ecosystem?Fish → Plants → BirdsPlants → Birds → FishPlants → Fish → BirdsFish → Birds → Plants
- 14. Multiple ChoiceUse the energy pyramid to answer the question that follows. When one organism consumes (eats) another one, the molecules in the food are converted while energy is transferred. The different positions that identify an organism’s place in an ecosystem as shown above aretrophic levelsfood chainsniche sitesenergy sources
- 15. Multiple ChoiceAnimals get energy from eating food that comes from plants. Plants survive by taking in substances that are released by animals. What substance do animals release that plants take in?carbon dioxideoxygensaltsugar
- 16. Multiple ChoiceThe primary reason that plants are important for an ecosystem is because theyprovide energy for consumers.depend on other organisms for shelter.break down dead animal matter.consume nutrients for energy.
- 17. Multiple ChoiceWhich organisms use the energy from the remains of dead animals and recycle the nutrients back into the environment?producersherbivoresomnivoresdecomposers
- 18. Multiple ChoiceWhich organisms form the base of all ecosystems?scavengersproducersconsumersdecomposers
- 19. Multiple ChoiceWhich statement BEST describes the energy transfer of organisms eating other organisms?More energy is available after each transfer.Less energy is available to higher consumer levels.Energy transfer is greatest among primary consumers.Energy transfer to secondary consumers is greater than to primary consumers.
- 20. Multiple ChoiceA marsh food chain is shown.
According to the food chain, how would an increase in the toad population MOST likely affect the other populations?The grass population would decrease.The hawk population would decrease.The snake population would decrease.The grasshopper population would decrease. - 21. Multiple ChoiceA food chain is shown. What is the abiotic factor in this food chain?sunlightgrassrabbitsnake
- 22. Multiple ChoiceUse the food chain to answer the question that follows. What would happen if the frogs were suddenly removed from the food chain?The grasshopper population would increase.The snake population would begin feeding on grasshoppers.The owl population would increase.The clover population would be unaffected.
- 23. Multiple ChoiceWhich organisms eat only plants?producersomnivoresherbivoresscavengers
- 24. Multiple ChoiceBelow is a food chain from an ecosystem. The arrows indicate the direction of the flow ofenergywateroxygencarbon dioxide
- 25. Multiple ChoiceAs members of a food web, humans are considered to beproducersconsumersdecomposersscavengers
- 26. Multiple ChoiceStudents studied how energy flowed through a food chain. The students understood that snakes gained their energy by eating mice. The mice had gained energy by eating plants.
From where did the plants get their energy?airrainwatersoilsunlight - 27. Multiple ChoiceAn ocean food chain is shown. Which organism gets its energy directly from the Sun?phytoplanktonkrillfishsea lions
- 28. Multiple ChoiceDecomposers are organisms that obtain their food from dead organisms. Which of these would be classified as decomposers?algae, plantssnakes, wolves, whalesdeer, rabbits, micebacteria, fungi
- 29. Multiple ChoiceBracket fungi grow and feed on the dead wood inside of trees. What is the role of bracket fungi in an ecosystem?secondary consumersprimary consumersdecomposersproducers
- 30. Multiple ChoiceAphids are small, soft-bodied insects that feed on certain types of plants. Which level of a food web would be occupied by an aphid?producerconsumerfirst-level consumersecond-level consumer
- 31. Multiple ChoiceThe diagram shows a simple food web. This food web can show that grass isa source of energy for consumersa predator of other living things.a decomposer of dead matter.a shelter for other organisms.
- 32. Multiple ChoiceNicole was studying different ecosystems. She compared the number of plants living in a forest to those in a desert. Which factor BEST explains why more plants may survive in a forest?There is more rain in the forest.There is more oxygen in the forest.There is more sunlight in the forest.There is more competition in the forest.
- 33. Multiple ChoiceWhich of these BEST describes biomes?large ecosystems that have distinctive organisms and a particular climatea group of individuals of the same species that live together in the same areaa system made up of parts that work togetherexternal conditions that affect an organism
- 34. Multiple ChoiceWhich of these is necessary for life on Earth?watertreeswindsoil
- 35. Multiple ChoiceThe picture shows a pond ecosystem. Which abiotic factor is the basis for this ecosystem?insectsfrogswaterwind
- 36. Multiple ChoiceWhich of the following is an abiotic factor that can influence the quantity of fish a pond can support?availability of plantsconcentration of bacteriaquality of waternumber of consumers
- 37. Multiple ChoiceA spring-fed stream forms a pond that contains watercress plants, minnows, and crayfish. The pond receives 5 hours of direct sunlight every day. Which of the following is an abiotic factor in this ecosystem?the pond waterthe watercress plantsthe minnowsthe crayfish
- 38. Multiple ChoiceIn a zoo located in a warm region, which should be included in the polar bear exhibit?food bowl with fruithot, bright lightscold-water pooltall palm trees
- 39. Multiple ChoiceAs a habitat with a small pond goes through a long drought, which of these is MOST likely to happen to many of the fish in the pond?They would adapt to the dry environment.They would live on other sources of water.They would move to another habitat.They would be unable to survive.
- 40. Multiple ChoiceWhich of the following is an abiotic factor in a river ecosystem?dragonflytroutwaterfrog
- 41. Multiple ChoiceWhich environmental factor would MOST likely prevent an orange tree from surviving in the desert?the lack of moisturethe high levels of heatthe extra amount of windthe low levels of sunlight
- 42. Multiple ChoiceWhich of these is an abiotic element in an ecosystem?the average yearly rainfall in the ecosystemthe types of producers found in the ecosystemthe size of a predator population in the ecosystemthe microorganisms living in the soil of the ecosystem
- 43. Multiple ChoiceA picture is shown below.
Based on this picture, which is a biotic factor?the waterthe cloudsthe treesunlight - 44. Multiple ChoiceWhich statement BEST explains why few plants grow on a tropical rainforest floor?Heavy rains fall throughout the year.Temperatures in a tropical rainforest stay warm.Many different kinds of animals live on a rainforest floor.Layers of trees keep sunlight from reaching the forest floor.
- 45. Multiple ChoiceA student is trying to model an ocean environment. What is the MOST important factor the student should add to the aquarium in order to make sure that the model is accurate?starfishseaweedsalt watercoral reef
- 46. Multiple ChoiceAn abiotic factor that MOST influences the organisms living in a salt marsh isfishwaterpredatorsgrasses
- 47. Multiple ChoiceAn ecosystem is described below. Which row contains abiotic factors?1234
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