7th grade final exam

Multiple Choice

What happens to the energy that is lost as you go up the energy pyramid?

• At each step, the organism uses some energy for life processes

• At each step, some energy evaporates

• Some energy is lost as heat

• Both a and c are true

Multiple Choice

A squirrel lives in a hollow part of a tree without either hurting or benefiting the tree. How is this interaction classified?

• mutualism

• commensalism

• parasitism

• predation

Multiple Choice

Nitrogen in the soil is used by _______.

• plants

• animals

• both a and b

• neither a nor b

Multiple Choice

What is the first species to colonize new or undisturbed land?

• primary species

• successive species

• invasive species

• pioneer species

Multiple Choice

When land ecosystems change, the final result is another land ecosystem. When freshwater ecosystems change which is the final result?

• a freshwater ecosystem

• a land ecosystem

• a saltwater ecosystem

• an estuary

Multiple Choice

Decaying organisms fall to the bottom of a pond, lake, or wetland and add nutrients to the water. What is this process called?

• mitrification

• eutrophication

• decay supplementation

• oxygenation

Multiple Choice

Which statement summarizes the law of conservation of matter?

• Matter cannot change form or be destroyed, but it can be created

• Matter cannot change form or be created, but it can be destroyed

• Matter cannot be created or destroyed, but it can change form

• Matter can be created, destroyed or change form

Multiple Choice

When people started to develop and uise water-saving technologies in the OgallalaAquifer area, which of the following occurred?

• They stopped using water faster than it could be replaced

• They actually began replacing water in the aquifer

• They slowed the depletion rate from 3m per year to 1.3 m per year

• They slowed the depletion rate from 3m per year to 1.3cm per year

Multiple Choice

During photosynthesis, light energy becomes ___________ energy.

• soil life

• chemical

• mechanical

• pyramid

Multiple Choice

Which is NOT one of the 5 Rs for keeping the environment healthy?

• restore

• rethink

• repair

• reuse

Multiple Choice

Mrs. Miller, the science teacher, went to the supply room and came back mumbling about an example of resource depletion. Which of the following most likely happened?

• She spilled her coffee

• there was no more copy paper or pencils

• Someone spoke rudely to her

• There were so many supplies, they were stacked on the floor

Fill in the Blank

True or False

A community is all the organisms of the same species that live in the same area at the same time.

Multiple Choice

Which land biome covers the most area on Earth?

• desert

• grassland

• taiga

• temperate deciduous forest

Multiple Choice

How do temperate rain forests differ from tropical rain forests? Temperate rain forests

• are a source of lumber while tropical rain forests are not

• have nutrient rich soil, allowing trees to grow back when harvested, while tropical rain forests have nutrient poor soil, preventing trees from growing back rapidly

• are moist year round and tropical rain forests stay dry most of the year

• all of the above

Multiple Choice

Which is NOT an aquatic ecosystem?

• freshwater

• taiga

• estuary

• wetland

Multiple Choice

Which has higher oxygen levels?

• faster moving water

• slower moving water

• `Speed of water has no effect on the oxygen content of the water

• All water has the same amount of oxygen

Multiple Choice

What are the areas where freshwater meets saltwater called?

• wetlands

• estuaries

• coastal byways

• intertidal zones

Multiple Choice

What special adaptations do intertidal species have?

• adaptations to resist UV rays

• adaptations for surviving exposure to air

• adaptations for surviving heavy waves

• both b and c

Multiple Choice

The process of one ecological community gradually changing to another is which of the following?

• ecological replacement

• community succession

• ecological succession

• community replacement

Multiple Choice

If an existing ecosystem is destroyed, ___________.

• primary succession occurs

• secondary succession occurs

• a climax community comes into existence

• a different type of biome emerges

Multiple Choice

As plants in an area undergoing ecological succession die, _________. they are replaced by plants of the same species

• they are replaced by plants of the same species

• they are replaced by plants of a different species

• either a or b could occur

• no plants grow in their place

Multiple Choice

Match the environmental factor with its classification, abiotic or biotic

abiotic

• sunlight

• bacteria

• fungi

• none of these

Multiple Choice

Match the environmental factor with its classification, abiotic or biotic

abiotic

• fungi

• bacteria

• water

• none of these

Multiple Choice

Match the environmental factor with its classification, abiotic or biotic

biotic

• sunlight

• fungi

• water

• climate

Multiple Choice

Match the environmental factor with its classification, abiotic or biotic

biotic

• air

• soil

• temperature

• bacteria

Multiple Choice

Match the environmental factor with its classification, abiotic or biotic

abiotic

• air

• fungi

• mammals

• bacteria

Multiple Choice

Match the environmental factor with its classification, abiotic or biotic

abiotic

• plant

• fungi

• sunlight

• bacteria

Multiple Choice

Name three laws enforced by the EPA to help protect the environment. Give the year each was enacted. (For the test be able to list them with dates)

• The Endangered Species Act, 1983

• The Clean Air Act, 1970

• The Clean Water Act, 1972

• all of these

Multiple Choice

Which statement is true?

• Extinction of a population in an area can not benefit any other species in that area

• Extinction of one population of a species does not mean the entire species if extinct

• If a plant-eating species became extinct from an area, other plant eaters would have less food resources available

• If a plant-eating species became extinct from an area, the predators of that species would increase in population

Multiple Choice

What organism converts nitrogen to a form usable by producers?

• sheep

• plants

• bacteria

• beetles

Multiple Choice

Which of the following resources is considered to be a renewable resource?

• oxygen

• coal

• oil

• gas

Multiple Choice

What causes smog formation or acid rain?

• burning fossil fuels

• using CFCs in refrigerators

• applying chemical fertilizers to farmland

• both a and c

Multiple Choice

In which biome does drilling for oil and gas interrupt migration patterns?

• desert

• grassland

• taiga

• tundra

Multiple Choice

What is salinity?

• the amount of salt dissolved in water

• the amount of oxygen dissolved in water

• the amount of pollution in water

• the speed of the flow of water in a stream

Multiple Choice

Choose the true statement.

• Slower moving water contains more oxygen and nutrients than faster moving water.

• Faster moving water contains more oxygen and nutrients than slower moving water

• Faster moving water contains more oxygen, while slower moving water contains more nutrients

• Faster moving water contains more nutrients, while slower moving water contains more oxygen

Multiple Choice

As plants in a climax community die, ____________.

• They are replaced by plants of the same species

• They are replaced by plants of a different species

• either a or b could occur

• no plants grow in their place

Multiple Choice

A climax community is a community that _____________.

• is about to experience a major change

• has just been radically altered by a natural disaster

• is a stable community that no longer goes through major ecological change

• is always characterized by large trees

Multiple Choice

Discuss four ways that humans impact aquatic ecosystems. (Will have to list this on the test)

• People drain or fill in aquatic ecosystems to make more land for roads and buildings

• They overfish certain species of fish which upsets food webs

• They build dams that stop the flow of water in streams and rivers

• Runoff from cities, industries, and fams pollute the water

Fill in the Blank

People have cleared a little less than half of Earth's tropical rain forests.

Multiple Choice

A tick attaches to a dog and fills up with the dogs blood. this is harmful to the dog. How is this interaction classified?

• mutualism

• commensalism

• parasitism

• predation

Multiple Choice

If a species exceeds the carrying capacity of an environment, which of the following describes the area?

• overpopulated

• extinct

• populated less densely

• all of the above

Multiple Choice

Nitrogen makes up about _______ of Earth's atmosphere.

• 65%

• 7.8%

• 87%

• 78%

Multiple Choice

Which is a model of feeding relationships?

• protein building

• food map

• food web

• sugar molecules

Multiple Choice

What causes algal blooms in lakes and streams?

• burning fossil fuels

• using CFCs in refrigerators

• applying chemical fertilizers to farmland

• both a and c

Multiple Choice

Which of the following biomes has weather that is warm and wet year-round?

• desert

• grassland

• taiga

• tropical rain forest

Multiple Choice

A honeybee pollinates a flower while it is collecting nectar for its hive. How is this interaction classified?

• mutualism

• commensalism

• parasitism

• predation

Multiple Choice

What part does cellular respiration play in the oxygen and carbon dioxide cycle?

• It releases oxygen into the atmosphere

• it releases carbon dioxide into the atmosphere

• it removes carbon dioxide from the atmosphere

• it creates oxygen

Multiple Choice

What agreement among nations was intended to prevent the prediction shown in the diagram from coming to pass?

• The Montreal Protocol

• the Clean Air Act

• the Tokyo Accord

• the Clean Water Act

Multiple Choice

Wetlands contain which of the following?

• only freshwater

• only saltwater

• either freshwater or saltwater

• very little nutrients

Multiple Choice

In the open ocean, where does photosynthesis take place?

• from the ocean floor to a depth of 1,000m

• from 1,000m to 200m

• from 200m to the surface

• in all the zones