Ecosystems
Which comparison of ecosystems is true?
A. Tundras are warmer than grasslands.
B. Grasslands get more rain than deserts.
C. Deserts have more plants than rainforests.
D. Rainforests are rockier than tundras.
B. Grasslands get more rain than deserts.
How are forests and grasslands similar?
A. They both have many types of trees.
B. They both have many types of grasses.
C. They are both found only in cold climates.
D. They are both found in warm and cold climates.
D. They are both found in warm and cold climates.
Which group will carnivores feed upon?
A. fungi B. bacteria C. consumers D. producers
C. consumers
What is the vocabulary definition for a food chain?
Shows how living things are connected according to what they eat
How are a salt water marsh and a lake most similar?
A. They both have diverse organisms.
B. They both are near the ocean.
C. They both have salt water.
A. They both have diverse organisms.
What is the vocabulary definition for ecosystems?
A community and its physical environment
Which two ecosystems are most likely found close to an ocean?
A. forest and estuary
B. grassland and lake
C. lake and salt marsh
D. estuary and salt marsh
D. estuary and salt marsh
Which will most likely cause a decrease in predator populations?
A. an increase in prey populations
B. a decrease in prey populations
C. a decrease in decomposers
D. an increase in producers
B. a decrease in prey populations
A food chain is shown below.
sun → grass → grasshopper → scorpion → kit fox → bacteria Which organisms are consumers?
A. scorpion and bacteria
B. grass and grasshopper
C. grasshopper, scorpion, and kit fox
D. grasshopper, scorpion, and bacteria
C. grasshopper, scorpion, and kit fox
Which area is most likely closest to a salt marsh or an estuary?
A. a lake
B. a prairie
C. a coastline
D. the mountains
C. a coastline
A biologist observed a zebra, a gazelle, and a prairie dog on an African grassland. Which term best describes the animals the biologist saw in the terrestrial ecosystem?
A. carnivores
B. consumers
C. decomposers
D. producers
B. consumers
Which explains the difference between a pond and an estuary?
A. A pond is very shallow and an estuary is very deep. B. A pond contains no plants and an estuary contains plants.
C. A pond is affected by tides and an estuary is not affected by tides.
D. A pond contains freshwater and an estuary contains fresh and salt water.
D. A pond contains freshwater and an estuary contains fresh and salt water.
Which best describes an ecosystem?
A. a kingdom of animals
B. all the life on a specific continent
C. a community of plants and animals
C. a community of plants and animals
Which is most responsible for recycling dead plants and animals in an ecosystem?
A. water
B. bacteria
C. fish
D. insects
B. bacteria
Which best describes a difference between estuaries and ponds?
A. Ponds flow into the ocean and estuaries do not.
B. Ponds are affected by tides and estuaries are not.
C. Ponds are freshwater and estuaries are brackish water.
D. Ponds have salt water and estuaries have brackish water.
C. Ponds are freshwater and estuaries are brackish water.
Which gets all of its energy from the sun?
A. producer
B. consumer
C. decomposer
A. producer
How are grasslands and estuaries most alike?
A. They both support marine life.
B. They both have wide open areas.
C. Lightning strikes easily start fires in both.
D. Trees prevent growth of smaller plants in both.
B. They both have wide open areas.
In which two ecosystems would you find rattlesnakes, deer, and rabbits?
A. forest and ocean
B. ocean and estuary
C. grassland and forest
D. estuary and grassland
C. grassland and forest
A simple food chain includes hawks, lizards, and insects. Which will most likely happen to the lizard and hawk populations if a pesticide is sprayed to kill the insects, and the lizard and hawk populations cannot find other food in this ecosystem?
A. Both the lizard population and the hawk population will increase.
B. Both the lizard population and the hawk population will decrease.
C. The lizard population will increase, but the hawk population will decrease.
D. The lizard population will decrease, but the hawk population will increase.
B. Both the lizard population and the hawk population will decrease.
Which best describes the ecosystem of a lake or pond? A. They are aquatic because they are made of land.
B. They are aquatic because they are made of water.
C. They are terrestrial because they are made of land.
D. They are terrestrial because they are made of water.
B. They are aquatic because they are made of water.
Why are animals like deer, raccoons, bears, and coyotes sometimes seen in neighborhoods?
A. because it is easier to find food
B. because they can escape predators
C. because their habitats are increasing
D. because their habitats are decreasing
D. because their habitats are decreasing
How are a grassland ecosystem and a pond ecosystem connected?
A. Grassland animals, such as fish and snails, may live in a freshwater pond.
B. Grassland animals, such as buffalo and rabbits, may drink salt water from a pond.
C. Pond animals, such as buffalo and rabbits, may drink freshwater from the grassland.
D. Grassland animals, such as buffalo and rabbits, may drink freshwater from a pond.
D. Grassland animals, such as buffalo and rabbits, may drink freshwater from a pond.
Which organism is a producer?
A. frog
B. mushroom
C. grass
D. lizard
C. Grass
A rabbit depends on various plants in an ecosystem to survive. Which would most likely happen if a drought decreased the plant population?
A. The rabbit population would increase.
B. The rabbit population would decrease.
C. The rabbit population would remain the same.
D. The rabbit population would increase, then decrease quickly.
B. The rabbit population would decrease.
Jacob is traveling within the United States and encounters prairie dogs, flat lands, and large areas of short grass. Through which ecosystem is Jacob most likely traveling?
A. desert
B. grassland
C. deciduous forest
D. tropical rainforest
B. grassland