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7th Grade Final Review

Total questions: 140

Worksheet time: 5hrs 36mins

Name
Class
Date
1.

What is the starting source of energy for all food chains?

a)

grass

b)

sun

c)

bug

d)

mushrooms

2.
What do the arrows represent in a food chain?
a)
Stop
b)
Start
c)
"Gives energy to"
3.

What is this model called?

a)

Food Chain

b)

Food Web

c)

Habitat

d)

Herbivore

4.
An animal that eats BOTH animals and plants is called an
a)
Herbivore
b)
Omnivore
c)
Carnivore
d)
Habitat
5.

An animal that ONLY eats plants is called a

a)

Herbivore

b)

Carnivore

c)

Omnivore

d)

Plantivore

6.

An animal that ONLY eats other animals is called a

a)

Carnivore

b)

Omnivore

c)

Herbivore

d)

Consumer

7.

Why do people eat?

a)

to gather family

b)

to sleep

c)

for energy

d)

for exercise

8.

Lions only eat buffalo, antelopes, zebras and crocodiles. They are called __________.

a)

Omnivore

b)

Herbivore

c)

Carnivore

d)

Delivore

9.

Bears eat fish, insects, plants, seeds, nuts and young elk. They are called __________.

a)

Franivore

b)

Carnivore

c)

Herbivore

d)

Omnivore

10.

An animal that only eats plants is a...

a)

carnivore

b)

omnivore

c)

herbivore

d)

decomposer

11.
All energy on Earth ultimately comes from what source?
a)
Water
b)
Sun
c)
Consumers
d)
Oxygen
12.

What's the name of this habitat?

a)

Forest

b)

Desert

c)

Ocean

d)

Tundra

13.

What's the name of this habitat?

a)

Forest

b)

Desert

c)

Ocean

d)

Tundra

14.

What's the name of this habitat?

a)

Forest

b)

Desert

c)

Ocean

d)

Tundra

15.
A habitat is a specific place that an animal lives.
a)
True
b)
False
16.
What is a habitat?
a)
A place animals call home
b)
Something animals eat
c)
A region with just non-living organisms
17.
What organism consumes both rabbits and birds?
a)
The Hawk
b)
The Wolf
c)
The Plant
d)
The Mushroom
18.
How many primary consumers are in this food web?  
a)
1
b)
2
c)
3
d)
4
19.
Look at the blank Energy Pyramid.  Which Trophic Level is where we would find the Tertiary Consumers?  
a)
The bottom level
b)
The second from the bottom level
c)
The top level
d)
The second from the top level
20.
Who are the primary producers in this food web?  
a)
The lizard and the Hawk
b)
The Grasshopper and the Mouse
c)
The rabbit and the Hawk
d)
The lizard and the snake
21.
Which of the following are abiotic factors in an environment?
a)
People
b)
Cow
c)
Salinity
d)
Chicken
22.
What level consumer could you consider the deer?  
a)
Primary
b)
Secondary
c)
Tertiary
d)
Quarternary
23.
A secondary consumer will gain energy from what level consumer?  
a)
Producers
b)
Primary Consumers
c)
Tertiary Consumers
d)
Apex Predators
24.
If the sun provides all energy in the Energy Pyramid, and the energy decreases by a division of 10 as you travel up the pyramid, how much energy does the Tertiary Consumer have?  
a)
100%
b)
10,000%
c)
10%
d)
.1%
25.
An organism that consumes only other animals is also known as a what?  
a)
Autrotroph
b)
Heterotroph
26.
An organism that eats both plants and other animals is also known as.....
a)
Weird
b)
Autotroph
c)
Omnivore
d)
Carnivore
27.
In a food web and a food chain, you show arrows to demonstrate how the ___________ transfers from one organism to the other.  
a)
Food
b)
Animals
c)
Energy
d)
Producers
28.
What level consumer is the owl in the food chain?  
a)
Tertiary
b)
Primary
c)
Secondary
d)
Quarternary
29.
A Quarternary Consumer will receive energy from which of the following?  
a)
Primary
b)
Secondary
c)
Tertiary
d)
Producer
30.
Virtually all plants are autotrophic.  But there are no autotrophic animals or fungi.  What can you infer about autotrophic organisms?
a)
They can move on their own
b)
They are at the top of the food chain
c)
They can make their own energy
d)
They reproduce slowly
31.
If there are 10,000KCal unites of nergy available for the producers, and a lion is the secondary consumer in a food chain, how many calories does the lion get
a)
1
b)
10
c)
100
d)
1000
32.
A Kcal (Kilacalorie) is a unit of energy.  Why is the energy pyramid a good model for the flow of energy through the ecosystem?  
a)
More energy is available at the top of the pyramid
b)
At each level, energy is used and not passed on
c)
The bottom of the pyramid has more different kinds of organisms
d)
It allows you to see what organisms are in the ecosystem
33.
A rabbit eats the grass, the snake eats the rabbit and the hawk eats the snake.  Who has the most energy in this food chain?  
a)
The rabbit
b)
The snake
c)
The hawk
d)
The grass
34.
A mouse eats the grass, a snake eats the mouse and the hawk eats the snake.  Who has the least amount of the original energy from this food chain?
a)
Mouse
b)
Grass
c)
Snake
d)
Hawk
35.
A food web, is a series of interconnected food chains put together to represent an environment.  The arrows which represent energy transfer, show energy leaving an organism, to be consumed by another.  Who or what does the rabbit, get its energy?  
a)
grasshopper
b)
fox
c)
rabbit
d)
green plants
36.
Which of the following could NOT be an example of a prey animal? 
a)
Trees
b)
Mice
c)
Rabbits
d)
Snakes
37.
If the number of births in a population is the same as the number of deaths in a population, what will happen to the growth of the population?
a)
It will increase.
b)
It will decrease.
c)
It will stay the same.
d)
It will fluctuate.
38.
If the number of births is greater than the number of deaths in a population, what will happen to the growth of the population?
a)
It will increase.
b)
It will decrease.
c)
It will stay the same.
d)
It will fluctuate.
39.
Largest number of individuals of a population that the environment can support...  
a)
carrying capacity
b)
population crash
c)
lag phase
d)
mutualism
40.
What is the carrying capacity for this sheep population?
a)
1.8 million
b)
1.25 million
c)
1.6 million
d)
1.o million
41.
When a population grows past the ecosystem's carrying capacity, what happens to the population?
a)
Continues to grow
b)
The population starts to die off to return to carrying capcity
c)
The population will go extinct due to lack of resources
d)
The population grows then finds a new carrying capacity
42.
Food, water, sunlight, shelter, and space are resources that are often __________.
a)
limiting factors
b)
wet
c)
messy
d)
found in rocks
43.
If there is more food than usual in an ecosystem, then the population will mostly likely...
a)
stay the same
b)
decrease
c)
increase
44.
In a forest ecosystem, which of the following is the best example of a limiting factor for a rabbit population?
a)
Squirrel Population
b)
Sunlight
c)
Grass available
45.
number of organisms per certain area
a)
carrying capacity
b)
limiting factor
c)
total population
d)
population density
46.
When organisms move out of the population, this is known as
a)
emigration
b)
abandonment
c)
immigration
d)
succession
47.
What is happening in a population as it decreases?
a)
more emigration occurs 
b)
more immigration occurs
c)
the birth rate and death rate remain the same
48.
What happened to the wolf population between 1980 and 1982?
a)
it increased rapidly
b)
it decreased rapidly
49.
which statement sounds accurate based on the graph data. 
a)
The zebra and lions do not affect each other
b)
when lions population increases, so does the zebra population
c)
When the zebra population increases, it causes the lion population to also increase
d)
when zebra populations go down, the zebra population goes up. 
50.

______________ means moving into a population.

a)

Immigration

b)

Emmigration

c)

Plantation

d)

Repopulation

51.

A population of panthers lives in the southeastern United States. Over 50 years, the size of the panther population in the region increased. What best explains the increase in the size of the panther population?

a)

The panther population is always increasing because no animal eats panthers.

b)

Fewer panthers were born than died.

c)

More panthers were born than died.

d)

A lot of panthers were born and none of them died.

52.

Scientists have been studying the size of three populations along the coast of Antarctica. In this ecosystem, penguins eat sardines (a type of small fish), and sardines eat zooplankton (very small animals that live in water). The data showed that all three populations were stable. Then the penguin population decreased suddenly.


What will likely happen to the size of the sardine population as a result?

a)

stay the same. The size of its resource population did not change, so the amount of energy storage molecules available for the sardines did not change. There will be the same number of births and deaths in the sardine population.

b)

decrease. A decrease in one population causes a decrease in the sizes of all other populations in the ecosystem.

c)

increase. The smaller penguin population will leave more energy storage molecules available for the sardine population to reproduce more. This will lead to more births in the sardine population.

d)

increase. The smaller penguin population will need fewer energy storage molecules, so they will eat fewer sardines. This will lead to fewer deaths than births in the sardine population.

53.

What do birds such as hawks and eagles need energy for?

a)

flying

b)

digesting food

c)

reproducing

d)

All of the above

54.

In a rainforest, anteaters eat ants, and ants eat aphids (a type of very small insect). The sizes of the populations have been stable for the last 10 years, but recently the size of the aphid population decreased. What will likely happen to the anteater population?

a)

stay the same. Anteaters do not eat aphids, so the number of births and deaths in the anteater population will stay the same.

b)

decrease. Fewer energy storage molecules will be available to the anteater population from the smaller ant population, so the anteater population will reproduce less. This will lead to fewer births than deaths in the anteater population.

c)

decrease. A decrease in the size of any population leads to a decrease in the sizes of all other populations in an ecosystem.

d)

increase. The smaller aphid population will leave more energy storage molecules available in the ecosystem for the anteater population, so there will be more births in the anteater population.

55.

A large population of squirrels lives in a forest. In the last 50 years, the size of the squirrel population has stayed the same. What must be true about the squirrel population during the last 50 years?

a)

The number of squirrels that were born was the same as the number of squirrels that died.

b)

Humans started protecting the squirrel population so they stopped dying.

c)

The squirrels did not have any baby squirrels during these years.

d)

No squirrels were born and no squirrels died.

56.

In this food web, which of the following animals are part of the resource population?

a)

Deer

b)

Coyote

c)

Wolf

57.

In this food web, which organism(s) are part of the consumer population.


CAN SELECT MORE THAN ONE!!

a)

Deer

b)

Coyote

c)

Wolf

58.

When a population is stable it means...

a)

There are more births than deaths

b)

There are more deaths than births

c)

There are the same number of births and deaths

d)

No organisms were born or died.

59.

When a population is INCREASING it means...

a)

There are more births than deaths

b)

There are more deaths than births

c)

There are the same number of births and deaths

d)

No organisms were born or died.

60.

When a population is DECREASING it means...

a)

There are more births than deaths

b)

There are more deaths than births

c)

There are the same number of births and deaths

d)

No organisms were born or died.

61.

A consumer population is the population that..

a)

eats others.

b)

is eaten by others .

62.

A resource population is the population that..

a)

eats others.

b)

is eaten by others .

63.

How do producers get energy storage molecules?

a)

By eating other animals (through food).

b)

They make their own through photosynthesis.

c)

They don't need energy storage molecules.

64.

How do consumers get energy storage molecules?

a)

By eating other animals (through food).

b)

They make their own through photosynthesis.

c)

They don't need energy storage molecules.

65.

Scientists have been studying the size of three populations in a grassland. In this ecosystem, snakes eat rats, and rats eat grasshoppers. The data showed that all three populations were stable. Then the grasshopper population decreased suddenly. What will likely happen to the size of the rat population as a result?

a)

stay the same. The size of their consumer population did not change, so the number of deaths in the rat population did not change. There will be the same number of births and deaths in the rat population.

b)

increase. The smaller grasshopper population will need fewer energy storage molecules so there will be more energy storage molecules available for the rat population to reproduce. This will lead to more births in the rat population.

c)

decrease. A decrease in any population leads to a decrease in the sizes of all other populations in the ecosystem.

d)

decrease. The smaller grasshopper population provides fewer energy storage molecules for the rat population, so the rat population will reproduce less. This will lead to fewer births than deaths in the rat population.

66.
When humans burn fossil fuels, most of the carbon quickly enters the                       as carbon dioxide.
a)
Water
b)
Atmosphere
c)
Sun
d)
Air
67.
How do living organisms return carbon to the atmosphere in the carbon cycle?
a)
respiration and photosynthesis
b)
 decomposition and respiration
68.
Which of the following add carbon dioxide to the atmosphere?
a)
volcanoes
b)
combustion of fossil fuels
c)
animal and plant respiration
d)
all of these
69.
Organisms that do not decompose can be buried and become what?
a)
water
b)
nutrients
c)
air
d)
fossil fuels
70.
The average temperature of the surface of Earth has increased approximately 1°C in the past century. Which reason best explains this increase in temperature?
a)
lower levels of ozone in the atmosphere
b)
lower levels of nitrogen in the atmosphere
c)
higher levels of carbon dioxide and other greenhouse gases in the atmosphere
d)
higher levels of oxygen in the atmosphere
71.

With the help of the Sun, through the process of photosynthesis, carbon dioxide is pulled from the air to make plant________

a)

leaves

b)

food

c)

roots

d)

nutrients

72.

Through food chains, the carbon that is in plants moves to the animals that eat them. When an animal eats another animal, carbon is ___________________.

a)

released

b)

transferred

c)

dissolved

d)

gone

73.

Which process contributes carbon dioxide to the atmosphere?

a)

respiration

b)

photosynthesis

c)

tree farms

74.

Which process removes carbon dioxide from the atmosphere?

a)

deforestation

b)

tree farms

c)

burning fossil fuels

d)

cellular respiration

75.

Which of the following is correct?

a)

There is as much carbon on earth as when it was formed

b)

Carbon is being created whenever it is recycled

c)

Carbon is lost every time it is recycled

d)

Carbon changes to different forms and is never recovered

76.

What is the greatest contributor to atmospheric carbon?

a)

burning garbage

b)

burning biomass

c)

transportation

d)

household usage

77.

What are two (2) ways to reduce the carbon emissions from passenger cars?

a)

Use less expensive gas

b)

Carpooling

c)

Public Transportation

d)

Driving only passenger cars

78.
Organisms that do not decompose can be buried and become what?
a)
water
b)
nutrients
c)
air
d)
fossil fuels
79.
Carbon can be found in...
a)
The atmosphere
b)
Soil
c)
Fossil fuels
d)
All of the above
80.
Which of the following removes carbon from the atmosphere?
a)
Combustion
b)
Respiration
c)
Photosynthesis
d)
Death
81.

Respiration is the process by which animals take in _____ and release _____ to make energy. 

a)
photosynthesis, air
b)
carbon, oxygen
c)
oxygen
d)
oxygen, carbon dioxide
82.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
83.
Which of the following is the correct equation for PHOTOSYNTHESIS?
a)

CO2 +light+H2O --> O2 + glucose

b)

CO2 + glucose + H2O --> O2 + light

c)

O2 + light + H2O --> CO2 + Glucosg

d)

CO2 + O2 + H2O --> Light+ glucose

84.

Cellular Respiration involves the chemical breakdown of _____ to form ATP Energy

a)

Fats

b)

Fructose

c)

Glucose

d)

Proteins

85.

Water vapor leaves a plant in the biosphere and goes into the atmosphere through

a)

transpiration

b)

respiration

c)

precipitation

d)

evaporation

86.

biosphere

a)

all the water on Earth

b)

regions that contain all the living things on Earth

c)

the envelope of gases that surrounds Earth

d)

living things on land

87.

_____ moves underground to the ocean

a)

sea water

b)

groundwater

c)

lake water

d)

rain drops

88.

What happens when water vapor loses thermal energy?

a)

it expands into millions of droplets that form clouds

b)

it condenses into millions of droplets that form clouds

c)

it condenses into millions of droplets that form lakes and rivers

d)

it expands on the surface of plants and goes into the air

89.

atmosphere

a)

all the water on Earth

b)

regions that contain all the living things on Earth

c)

the envelope of gases that surrounds Earth

d)

living things on land

90.

When is energy absorbed during the water cycle?

a)

during evaporation

b)

during transpiration

c)

during condensation

d)

during precipitation

91.

hydrosphere

a)

all the water on Earth

b)

regions that contain all the living things on Earth

c)

the envelope of gases that surrounds Earth

d)

living things on land

92.

____ happens when liquid turns into a gas on Earth's surface

a)

evaporation

b)

condensation

c)

respiration

d)

transpiration

93.

How does energy from the Sun drive evaporation?

a)

it slows down the water molecules and breaks their bonds

b)

it makes the water molecules too big

c)

it speeds up the water molecules and breaks their bonds

d)

it speeds up the water molecules and creates new bonds

94.

reservoirs

a)

water storage areas during the water cycle

b)

places reserved for water usage by humans and animals

c)

made from water and ice that are too big to remain suspended in air

d)

made up of water droplets or ice crystals that are so small they remain suspended in the air

95.

Which statement does NOT apply to the water cycle?

a)

it has no beginning

b)

it has no end

c)

it is continuous

d)

it very rarely changes

96.

clouds

a)

water storage areas during the water cycle

b)

places reserved for water usage by humans and animals

c)

made from water and ice that are too big to remain suspended in the air

d)

made up of water droplets or ice crystals that are so small they remain suspended in the air

97.

Where does water from mountains or land NOT end up?

a)

lakes

b)

rivers

c)

the ocean

d)

space (unless sent there by a volcanic eruption!)

98.

Which of the following drive the movement of water in the water cycle? (choose all that apply)

a)

sunlight

b)

transpiration

c)

gravity

d)

evaporation

99.

Where is groundwater stored?

a)

in lakes and rivers

b)

in underground lakes

c)

in cracks and pores beneath Earth's surface

d)

in mid-ocean ridges

100.

Evaporation adds water to the

a)

biosphere

b)

atmosphere

c)

lithosphere

d)

geosphere

101.

What converts nitrogen gas into a usable form for plants and animals?

a)

bacteria

b)

rain

c)

fungi

d)

car exhaust

102.

The process in which nitrogen circulates and is recycled is called

a)

The nitrogen cycle

b)

The carbon cycle

c)

The water cycle

d)

The phosphorus cycle

103.

Organisms that need nitrogen to survive.

a)

only plants

b)

only animals

c)

only bacteria

d)

all living things

104.

How is nitrogen "fixed" into a usable form for plants?

a)

Through action of bacteria only

b)

Through lightning only

c)

Through action of bacteria and lightning

d)

Through photosynthesis

105.

How do animals get the nitrogen they need?

a)

From the air they breathe

b)

From the water they drink

c)

From the food they eat

d)

From the sun

106.

Gas that makes up 78% of our atmosphere.

a)

Oxygen

b)

Nitrogen

c)

Hydrogen

d)

Carbon Dioxide

107.

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

a)

nitrogen composition

b)

nitrogen fixation

c)

ammonia

d)

denitrification

108.

What is the formula for atmospheric nitrogen?

a)

N

b)

N2

c)

NH3

d)

NO3

109.

What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?

a)

Assimilation

b)

Fixation

c)

Ammonification

d)

Denitrification

110.

Plants and animals cannot use nitrogen directly from the air.

a)

True

b)

False

111.

According to this diagram, plants use nitrogen to make _________________________

a)

bacteria

b)

animals

c)

proteins

d)

decomposers

112.

According to this diagram, plants absorb

a)

nitrates

b)

nitrogen fixing bacteria

c)

animals

d)

decomposers

113.

According to this diagram, animals get proteins from eating ________________________

a)

decomposers

b)

bacteria

c)

plants

d)

sunlight

114.

The process that allows organisms to use nitrogen

a)

assimilation

b)

denitrification

c)

fixation

d)

ammonification

115.

A correct path that nitrogen could take would be

a)

air -> animals -> plants -> bacteria

b)

animals -> air -> bacteria -> plants

c)

bacteria -> air -> plants -> animals

d)

air -> bacteria -> plants -> animals

116.

Bacteria fix nitrogen from the atmosphere into a form plants can use.

a)

True

b)

False

117.

Bacteria create a form of nitrogen that animals can use directly.

a)

True

b)

False

118.

What do free living bacteria in the soil do?

a)

Make clouds

b)

Turn atmospheric nitrogen into nitrates

c)

Make carbon dioxide for plants to go through photosynthesis

d)

Help plants take in water

119.

In the nitrogen cycle, what does label A in the diagram represent?

a)

Gas

b)

Clouds

c)

Carbon dioxide in the atmosphere

d)

Nitrogen in the atmosphere

120.

All plants have nitrogen fixing bacteria in their roots.

a)

True

b)

False

121.
What does every food chain start with? (Even if it's not drawn or written there!)
a)
producers
b)
sun
c)
consumer
d)
decomposers
122.
An organism that needs to eat other organisms to obtain energy is known as a:
a)
Autotroph
b)
Producer
c)
Consumer
d)
Mutualist
123.
Consumer that eats plants
a)
heterotroph
b)
herbivore
c)
producer
d)
community
124.
What does a food web represent?
a)
All connections of energy flow throughout all organisms in a habitat.
b)
The specific ways that mutualism is carried out.
c)
A single pathway or energy flow between organisms. 
d)
How carnivores get their food. 
125.
relationship in which two species live closely together
a)
resource
b)
mutualism
c)
succession
d)
symbiosis
126.
The rabbit in this food web would be considered a:
a)
Decomposer
b)
Producer
c)
Secondary Consumer
d)
Primary Consumer
127.
Where an organism lives
a)
habitat
b)
niche 
c)
heterotrogh
d)
biosphere
128.
In this Food Web Pyramid Which type of consumer gets only 10% of the energy stored in plants?
a)
Herbivore
b)
Carnivore
c)
Omnivore
d)
Secondary Consumer
129.
Which one is not a consumer?
a)
anemone 
b)
bear
c)
shark
d)
vulture
130.
What is the term for each step in the transfer of energy and matter within a biological community?
a)
energy path
b)
food web
c)
trophic level
d)
food pyramid
131.
The image provided is an example of a(n):
a)
Carnivore
b)
Herbivore
c)
Producer
d)
Autotroph
132.
The amount of energy that usually transfers from one trophic level to the next...
a)
10%
b)
20%
c)
80%
d)
50%
133.
An illustration that uses arrows to show the MANY possible directions in which matter and energy can pass through the organisms in an ecosystem.
a)
Food chain
b)
Food web
c)
Energy Pyramid
d)
Succession Map
134.
The nonliving aspects of an ecosystem.
a)
Abiotic factors
b)
Biotic factors
135.
The living portions of the ecosystem.
a)
Biotic factors
b)
Abiotic factors
136.
A graphic illustration that shows each trophic level and the amount of useable energy contained within.
a)
Food chain
b)
Food web
c)
Energy Pyramid
d)
All of these
137.
A collection of organisms that make up a community as well as all of the nonliving aspects of the environment.
a)
Population
b)
Community
c)
Habitat
d)
Ecosystem
138.
As you move upward, from level to level, in an energy pyramid, energy _____.
a)
increases
b)
decreases
c)
stays the same
d)
increases exponentially
139.
 plants that convert energy from the sun
a)
decomposer
b)
primary consumer
c)
secondary consumer
d)
producer
140.
What are the Abiotic factors in this image? 
a)
water, sunlight, dirt, air
b)
birds and plants
c)
birds, water, dirt
d)
plants, water

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