Focus On Earth Science: California Grade 6

Unit 4: Ecology and Resources

Unit Tests

1.
One drawback of nuclear energy is that nuclear waste must be contained and stored safely for at least __________. 6.c
A)100 years
B)10 years
C)10,000 years
D)1,000 years
2.
All the communities in an area and the abiotic factors that affect them would be called __________. 5.e
A)a population
B)an ecosystem
C)a biome
D)the biosphere
3.
Which of these is a consumer? 5.c
A)a fungus
B)grass
C)a dead tree
D)a grasshopper
4.
Which of these is an abiotic factor? 5.e
A)sunlight
B)a beetle
C)a pine tree
D)a raccoon
5.
Which of these is the correct order of a food chain? 5.a
A)A rabbit is eaten by a wolf, which is eaten by grass.
B)A wolf is eaten by grass, which is eaten by a rabbit.
C)Grass is eaten by a rabbit, which is eaten by a wolf.
D)A rabbit is eaten by grass, which is eaten by a wolf.
6.
Which abiotic factor limits plant growth on the forest floor? 5.e
A)temperature
B)sunlight
C)air
D)water
7.
Which of these organisms is the first step in a food chain? 5.a
A)mammals
B)consumers
C)amphibians
D)producers
8.
Which of these is the most common way an organism can interact in a community? 5.c
A)An organism can serve as a source of food in a community.
B)An organism can live with other organisms in a community.
C)An organism can depend on other organisms to build its home.
D)An organism can reproduce with members of its community.
9.
Scientists are hoping to find a way to produce nuclear energy from a process called __________. 6.a
A)binding
B)fission
C)fusion
D)radiation
10.
The role that a species plays in a community is its __________. 5.c
A)habitat
B)niche
C)biotic potential
D)carrying capacity
11.
Which plant is typically found in grasslands? 5.d
A)moss
B)rice
C)cactus
D)corn
12.
Which group makes up the largest level of an energy pyramid? 5.a
A)omnivores
B)producers
C)carnivores
D)consumers
13.
"An energy source that will eventually run out is called a(n) __________ resource." 6.b
A)non-renewable
B)endangered
C)conserved
D)renewable
14.
Which term best describes the fungus that grows on trees? 5.c
A)predator
B)producer
C)consumer
D)decomposer
15.
Which of these is true? 5.a
A)Consumers produce their own food.
B)Energy is never converted from one form to another.
C)Energy can be transferred form one organism to another.
D)Producers never make their own food.
16.
The loss of Earth's rain forests could result in __________. 6.b
A)increased rainfall
B)species extinction
C)decreased CO2 levels
D)increased O2 levels
17.
Which biome typically has four distinct seasons? 5.d
A)tundra
B)temperate rain forest
C)desert
D)temperate deciduous forest
18.
All of the goldfish in an aquarium would represent a(n) __________. 5.e
A)population
B)community
C)ecosystem
D)biome
19.
An organism's home is its _______. 5.c
A)environment
B)niche
C)habitat
D)territory
20.
A food chain does not show every _______ in the community. 5.a
A)niche
B)habitat
C)environment
D)species
21.
Grass uses photosynthesis to produce __________. 5.a
A)water
B)sugar molecules
C)evaporation
D)fewer offspring
22.
Non-living physical features of the environment are called ________. 5.e
A)food chains
B)biotic factors
C)abiotic factors
D)carbon cycles
23.
Features of the environment that are alive now or once were alive are called __________. 5.e
A)nitrogen cycles
B)abiotic factors
C)food webs
D)biotic factors
24.
Which energy type is nonpolluting and free? 6.a
A)nuclear
B)wind
C)fossil fuel
D)biomass
25.
Biomass energy can be obtained from all of the following EXCEPT __________. 6.a
A)wood
B)rocks
C)garbage
D)ethanol
26.
Sun, wind, and water are all examples of __________ because they can be replaced by natural processes in less than 100 years. 6.b
A)clean energy sources
B)alternative energy resources
C)inexpensive resources
D)renewable resources
27.
A puddle is formed after a rainstorm. After two days of sunshine, the puddle disappears. What happened to the water? 4.a
A)It evaporated.
B)It went through chemosynthesis.
C)It oxidized.
D)It became a biotic factor.
28.
What is one thing a company could do to help lessen the impact today's throwaway culture has on the environment? 6.c
A)increase production
B)build more plants
C)lower costs
D)reduce packaging
29.
Which of the following nonrenewable energy resources is NOT a fossil fuel? 6.a
A)natural gas
B)coal
C)nuclear
D)oil
30.
Which of these is part of the nitrogen cycle? 5.b
A)Nitrogen is absorbed by plants when they die.
B)Nitrogen goes from the atmosphere to the soil.
C)Nitrogen is produced by living organisms.
D)Nitrogen is removed from soil by animal wastes.
31.
The majority of energy used by Americans comes from __________. 6.c
A)coal
B)hydroelectric
C)nuclear
D)petroleum
32.
Bacteria nodules associated with certain plants change _________ from the air into a form that can be used by most organisms. 5.b
A)nitrogen
B)carbon dioxide
C)oxygen
D)water vapor
33.
The most abundant fossil fuel in the world is __________. 6.a
A)petroleum
B)oil
C)coal
D)natural gas
34.
Which fossil fuel is formed by decaying plant matter? 6.a
A)oil
B)coal
C)petroleum
D)natural gas
35.
Which energy resource utilizes hot, dry rocks? 6.a
A)solar
B)wind
C)petroleum
D)geothermal
36.
Which of these affects the temperature of a region? 5.e
A)photosynthesis
B)the number of carnivores
C)latitude
D)the amount of humus in the soil
37.
The water cycle involves the processes of evaporation, condensation, and __________. 4.a
A)decomposition
B)precipitation
C)photosynthesis
D)symbiosis
38.
_______ activities affect the quality and availability of our natural resources: land, water, and air. 6.b
A)Animal
B)Fish
C)Plant
D)Human
39.
All the interactions in which an organism takes part make up its _______. 5.c
A)niche
B)community
C)population
D)ecosystem
40.
Which of the following is an example of a producer? 5.c
A)Preservation
B)human
C)grass
D)dog
41.
How long have the carbon atoms in your body been on Earth? 5.b
A)as long as you have been alive
B)billions of years
C)probably less than one year
D)15 minutes
42.
Photosynthesis is a plant process used to __________. 5.a
A)copy chromosomes
B)release energy
C)produce offspring
D)store energy
43.
Which of the following does a food web model? 5.a
A)Producers use sunlight.
B)Ecosystems change over time.
C)Energy moves through an ecosystem.
D)Abiotic factors affect populations.
44.
Which of the following statements about recycling is true? 6.a
A)Recycling is a way to reuse materials rather than obtain new ones.
B)Recycling won't help humans meet future needs.
C)Recycling takes more energy than obtaining the new material.
D)Recycling increases the amount of mineral resources needed every year.
45.
Fossil fuels cannot be replaced by natural processes in less than 100 years. They are classified as __________. 6.b
A)expensive
B)precious
C)renewable
D)nonrenewable
46.
Which of the following human practices does NOT aid in protecting the environment? 6.a
A)reduce
B)retire
C)reuse
D)recycle
47.
Which of these is an energy source for chemosynthesis? 5.c
A)omnivores
B)moonlight
C)sunlight
D)sulfur molecules
48.
Energy flows through an ecosystem in which form? 5.a
A)water
B)food
C)sunlight
D)heat
49.
Which of the following is a disadvantage to using nuclear power as an energy source? 6.a
A)supply is limited
B)generates only small amounts of energy
C)produces dangerous waste
D)creates air pollution during fission
50.
Consumers are organisms that cannot __________. 5.c
A)evaporate
B)reproduce
C)survive
D)photosynthesize
51.
Due to __________, populations cannot continue to grow larger forever. 5.e
A)biotic potential
B)limiting factors
C)symbiosis
D)habitats
52.
Which of these biomes receives the least amount of rainfall every year? 5.d
A)temperate deciduous forest
B)tropical rain forest
C)taiga
D)desert
53.
Which of these biomes receives little annual precipitation? 5.d
A)taiga
B)tundra
C)temperate deciduous forest
D)grasslands
54.
Which one of these is true of the tropical rain forest biome? 5.d
A)The soil thaws during the summer.
B)The soil contains permafrost.
C)The soil contains little dead vegetation.
D)The soil is thin and gravelly.
55.
Which organisms in a food chain have the least available energy? 5.a
A)those in the last link
B)those in the first link
C)those in the middle links
D)All have the same amount of available energy.
56.
Which of these natural resources has a limited supply on Earth? 6.b
A)cotton
B)water
C)trees
D)gold
57.
Which of these makes its own food? 5.c
A)carnivores
B)producers
C)water
D)soil
58.
What cycle of matter involves carbon dioxide in Earth's atmosphere? 5.b
A)oxygen
B)nitrogen
C)water
D)carbon
59.
Which of these is not an example of a natural resource? 6.b
A)sunlight
B)automobile
C)water
D)tree
60.
Which of these animals might be found living in a taiga? 5.d
A)zebra
B)kangaroo rat
C)moose
D)spotted owl
Grade 6
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