a. They get energy directly from sunlight c. They make their own food

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1 1) In which food chain is the most energy lost from the ecosystem? a. algae snail crane osprey b. algage zooplankton sunfish c. algae zooplankton sunfish tuna humans d. algae zooplankton sunfish heron 2) Which of the following gives the correct order of a food chain? a. sun>hawk>snake>grass c. grass>mouse>snake>hawk b. sun>mouse>snake>hawk d. mouse>snake>hawk>grass 3) What is the place of the grasshopper in this land food web? a. The grasshopper eats carrots and is eaten by owls b. The grasshopper eats grains and is eaten by mice c. The grasshopper eats grass and is eaten by foxes d. The grasshopper eats grains and is eaten by owls 4) If all the grasshoppers are removed from this food web, which population will most likely decrease first? a. birds b. grasses c. grains d. foxes 5) How do decomposers help the energy cycle? a. They get energy directly from sunlight c. They make their own food b. They eat waste d. They return nutrients to the soil 6) What is the source of energy in most ecosystems? a. producers b. plants c. the Sun d. decomposers 7) Where do secondary consumers get their energy from? a. decomposers b. nutrients in the soil c. herbivores d. plants

2 picture below to answer questions: 8-10 Use the 8) The diagram shows a a. food chain b. food web c. an energy pyramid d. an ecosystem 9) Which organism in the picture would be a primary consumer? 10) Which organism is a higher level consumer? 11) Leeches attach themselves to a host and suck their blood. What type of relationship does this describe? 12) A Cuckoo bird lays its eggs in a Warbler s bird nest. The Cuckoo benefits because its young will be raised by the Warbler. The Warbler is harmed because its young are displaced by the Cuckoo birds. What type of symbiosis is this? 13) Ostriches and gazelles feed next to each other. They both watch for predators and alert each other to danger. Since the visual abilities of the two species are different, they can identify threats the other animal would not as readily see. What type of relationship do the two organisms have? 14) Hermit Crabs live in shells made and then abandoned by snails. This neither harms nor helps the snails. What type of relationship do the two organisms have? 15) As bison walk through the grass, insects become active and are seen and eaten by cowbirds. This neither helps nor harms the bison. What type of relationship do the two organisms have?

3 16) What is symbiosis? a) The relationship between plants and the sun b) The relationship between animals and their habitat c) The relationship between two organisms in a community d) The relationship between precipitation and animals in an ecosystem. 17) Which is an example of parasitism? a) Two species of insects that feed on the same plant b) A flea feeds on a mouse s blood, harming the mouse c) An African lioness feeding on her cubs d) An oxpecker hops around on a rhino s back eating insects 18) Mistletoe is a plant that lives and grows in trees. Its roots grow into a tree s tissues in order to get food and water. The tree may become week from loss of these nutrients. What kind of relationship exists between the mistletoe and the tree? 19) Wrasse fish feed on the parasites found on the black sea bass s body. Both species benefit. What kind of relationship exists between the mistletoe and the tree? 20) How are commensalism and mutualism alike? a) Neither of them is harmful to the plants and animals involved b) They both have hosts c) They only occur between two animals d) They are both harmful to the plants and animals involved.

4 KEY 1) In which food chain is the most energy lost from the ecosystem? a. algae snail crane osprey b. algage zooplankton sunfish c. algae zooplankton sunfish tuna humans d. algae zooplankton sunfish heron 2) Which of the following gives the correct order of a food chain? a. sun>hawk>snake>grass c. grass>mouse>snake>hawk b. sun>mouse>snake>hawk d. mouse>snake>hawk>grass 3) What is the place of the grasshopper in this land food web? a. The grasshopper eats carrots and is eaten by owls b. The grasshopper eats grains and is eaten by mice c. The grasshopper eats grass and is eaten by foxes d. The grasshopper eats grains and is eaten by owls 4) If all the grasshoppers are removed from this food web, which population will most likely decrease first? a. birds b. grasses c. grains d. foxes 5) How do decomposers help the energy cycle? a. They get energy directly from sunlight c. They make their own food b. They eat waste d. They return nutrients to the soil 6) What is the source of energy in most ecosystems? a. producers b. plants c. the Sun d. decomposers 7) Where do secondary consumers get their energy from? a. decomposers b. nutrients in the soil c. herbivores d. plants

5 Use the picture below to answer questions: ) The diagram shows a a. food chain b. food web c. an energy pyramid d. an ecosystem 9) Which organism in the picture would be a primary consumer? 10) Which organism is a higher level consumer? 11) Leaches attach themselves to a host and suck their blood. What type of relationship does this describe? 12) A Cuckoo bird lays its eggs in a Warbler s bird nest. The Cuckoo benefits because its young will be raised by the Warbler. The Warbler is harmed because its young are displaced by the Cuckoo birds. What type of symbiosis is this? 13) Ostriches and gazelles feed next to each other. They both watch for predators and alert each other to danger. Since the visual abilities of the two species are different, they can identify threats the other animal would not as readily see. What type of relationship do the two organisms have? 14) Hermit Crabs live in shells made and then abandoned by snails. This neither harms nor helps the snails. What type of relationship do the two organisms have? 15) As bison walk through the grass, insects become active and are seen and eaten by cowbirds. This neither helps nor harms the bison. What type of relationship do the two organisms have?

6 16) What is symbiosis? a) The relationship between plants and the sun b) The relationship between animals and their habitat c) The relationship between two organisms in a community d) The relationship between precipitation and animals in an ecosystem. 17) Which is an example of parasitism? a) Two species of insects that feed on the same plant b) A flea feeds on a mouse s blood, harming the mouse c) An African lioness feeding on her cubs d) An oxpecker hops around on a rhino s back eating insects 18) Mistletoe is a plant that lives and grows in trees. Its roots grow into a tree s tissues in order to get food and water. The tree may become week from loss of these nutrients. What kind of relationship exists between the mistletoe and the tree? 19) Wrasse fish feed on the parasites found on the black sea bass s body. Both species benefit. What kind of relationship exists between the mistletoe and the tree? 20) How are commensalism and mutualism alike? a) Neither of them is harmful to the plants and animals involved b) They both have hosts c) They only occur between two animals d) They are both harmful to the plants and animals involved.