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Gr 7 Science Topic #7 Review

Total questions: 71

Worksheet time: 3hrs 21mins

Name
Class
Date
1.

Termites are tiny insects that can cause severe damage to homes and other structures that consist of wood. Termites are an example of what type of factor.

a)

Biotic

b)

Abiotic

2.

Water is a compound that consists of 2 hydrogen atoms and 1 oxygen atom. Up to 60% of an adult human is made up of water. Water is an example of what type of factor?

a)

Biotic

b)

Abiotic

3.

An arctic blast pushed its way through several of the Northern state in the United State. The temperatures dropped below freezing for several days. Temperature is an example of which type of factor?

a)

Biotic

b)

Abiotic

4.

Which of these is a biotic factor in a river ecosystem?

a)

the types of microorganisms that live in the river water

b)

the amount of soil and other particles carried by the river

c)

the speed at which the river water flows toward the ocean

d)

the amount of rain that flows off the land and into the river

5.

Which of the following is a biotic factor in an ocean ecosystem?

a)

the salt content of the water

b)

the temperature of the water

c)

the fish in the water

d)

the oxygen in the water

6.

Biotic can be defined as

a)

the living parts of an environment

b)

non-living parts of an environment

c)

rocks and water

d)

snakes and water

7.

What is the difference between the biotic and abiotic factors?

a)

Biotic factors are living things and abiotic factors are nonliving things.

b)

Biotic factors are nonliving things and abiotic factors are living things.

8.
Temperature, light, air, water, and soil are all  _____  parts of the environment
a)
alive
b)
biotic 
c)
abiotic
d)
living
9.
A collection of organisms that belong to different populations but all live in the same area and interact with one another.
a)
Population
b)
Ecosystem
c)
Community
d)
Ecosphere
10.
Which of the following is NOT a level of organization in ecosystems?
a)
community
b)
species
c)
population
d)
organism
11.

A single living thing

a)

organism

b)

population

c)

community

d)

ecosystem

12.

Coyote, sand, 102 degrees, cactus, and snake.

a)

ecosystem

b)

biomes

c)

niche

d)

community

13.

Which choice shows the correct order of the levels of environmental organization?

a)

organism, population, community, ecosystem, biosphere

b)

organism, population, ecosystem, biosphere, community

c)

organism, community, population, ecosystem, biosphere

d)

population, ecosystem, biosphere, organism, community

14.

All the individuals of one species in a given area is called a ______________. A herd of zebras would be an example.

a)

Population

b)

Community

c)

Non-living

d)

Organism

15.

The total sum of all the populations of living things within an area that interact with one another is called_________. Zebra, elephants, and giraffes would be an example

a)

Biosphere

b)

Population

c)

Community

d)

Organism

16.

An _____________ is an interwoven system of biotic and abiotic factors.

a)

Species

b)

Ecosystem

c)

Microscope

d)

Zoo

17.

Two arctic fox are fighting with a polar bear for a sea lion carcass. One fox distracts the bear while the other eats. What type of limiting factor is the polar bear?

a)

Predator-Prey Relationships

b)

Competition

c)

Herbivory Effect

d)

Weather

18.

A group of elephants gets stuck in mud at the edge of the river from a recent mud slide. A lion waits for an elephant to get tired before it attacks. What is the limiting factor to the elephant population?

a)

Predator-Prey Relationships

b)

Natural Disaster

c)

Herbivory Effect

d)

Competition

19.

A duck population normally begin migrating south right after the last rain of the late summer season. Suddenly, they’re migrating much earlier. The climate has been changing far too often which is altering the effects of their magnetite.

a)

Predator-Prey Relationships

b)

Weather

c)

Herbivory Effect

d)

Competition

20.

A honey-badger digs the ground tunnels in search for snakes. In one occasion, the badger finds a snake and competes with it. The badger leaves scratches and bite marks on the snake before it escapes. After twenty-four hours the snake dies. What is the limiting factor to the snake?

a)

Predator-Prey Relationships

b)

Competition

c)

Disease

d)

Predation

21.

A student brings home a bull toad from the Amazon in Brazil. It gets fat and ugly so he tosses it in the river. This toad starts competing with local toads for their food, shelter, and space. What kind of limiting factor best represents what happened to the local toads?

a)

Competition

b)

Overcrowding

c)

Natural Disaster

d)

Human Impact

22.

What is a limiting factor?

a)

Factors that always increase a population

b)

Factors that always decrease a population

c)

Resources that are unlimited

d)

Factors/resources that limit how many organisms can live in an area at the same time

23.
What does "energy role" mean?
a)
how an organism gets its energy
b)
how organisms compete for limited resources
c)
how populations grow and develop over time
d)
how limiting factors determine carrying capacity
24.
What energy role describes an organism that makes its own food, usually by using energy from the sun?
a)
consumer
b)
producer
c)
carnivore
d)
decomposer
25.
Herbivores eat
a)
meat only
b)
plants only
c)
both meat and plants
d)
freshly dead organisms
26.
Omnivores eat
a)
meat only
b)
plants only
c)
both meat and plants
d)
freshly dead organisms
27.
Carnivores that eat freshly dead organisms are
a)
herbivores
b)
decomposers
c)
omnivores
d)
scavengers
28.
Vultures use their excellent sense of smell to find newly dead organisms to eat. This energy role is 
a)
scavenger
b)
decomposer
c)
carnivore
d)
herbivore
29.
An maple tree takes in energy from the sun and uses it to make food for itself. This energy role is
a)
herbivore
b)
omnivore
c)
producer
d)
consumer
30.

All food chains/webs start with

a)

producers

b)

consumers

c)

decomposers

d)

scavengers

31.

____________________ is the process by which light energy from the sun is converted to food.

a)

osmosis

b)

inertia

c)

photosynthesis

d)

decomposition

32.

What is the primary source of energy used by producers during photosynthesis?

a)

dirt

b)

light energy from the sun

c)

chemical energy from food and oxygen

d)

chemical energy from carbon dioxide and water

33.

Which of these organisms can be classified as a decomposer?

a)
b)
c)
d)
34.

Which of the following is a biotic factor in an ecosystem?

a)

wind

b)

tree leaves

c)

small rocks

d)

light from the sun

35.
A diagram of a food web is shown below.Which organism receives the least amount of energy from the producers?
a)
Hawk
b)
Rabbit
c)
Grasshopper
d)
Mouse
36.

Organisms that eat other organisms are called...

a)

Consumers

b)

Producers

c)

Decomposers

37.

Which level of consumer is responsible for eating the producer in a food chain/web?

a)

Tertiary consumer

b)

Secondary consumer

c)

Primary consumer

38.

Which organism is NOT a primary consumer?

a)

Caterpillar

b)

Blue jay

c)

Grasshopper

d)

Rabbit

39.

What is the pattern of overlapping food chains in an ecosystem?

a)

food chain

b)

food web

c)

carbon cycle

d)

water cycle

40.

What is a diagram that shows how each living thing gets food, and how nutrients and energy are passed from organism to organism? This process begins with the sun

a)

food chain

b)

food web

c)

water cycle

d)

carbon cycle

41.

What is an organism at the third trophic level that eats the primary consumers making them carnivores or omnivores?

a)

Secondary consumer

b)

Tertiary consumer

c)

Carnivore

d)

Producer

42.

What would happen to the bird if the green fish died out?

a)

the bird population would grow

b)

the bird population would die out

c)

the smaller fish will die out

43.

the top layer of an energy pyramid a primary consumer?

a)

true

b)

false

44.

What does an energy pyramid show?

a)

Energy flow in a community

b)

Longest lifespans

c)

The stronger animal the higher it is on the pyramid

45.

What would happen if their were no producers?

a)

Every population would grow larger

b)

Everything would die out

c)

The animals would make their own food

46.
In the energy pyramid here, which organisms have the most energy available?
a)
Producers
b)
Carnivores
c)
Herbivores
d)
Top Predator
47.
If there is 1000 Kcal available in the producers in trophic level 1, how much energy is available in the herbivores in trophic level 2?
a)
10 Kcal
b)
1 Kcal
c)
100 Kcal
d)
1000 Kcal
48.
A secondary consumer 
a)
eats primary consumers
b)
eats producers
c)
eats plants
49.

What amount of percentage does the energy decrease as it goes up the pyramid?

a)

100%

b)

1000%

c)

10%

d)

1%

50.

Which example is a form of precipitation?

a)

Dew

b)

Fog

c)

Frost

d)

Hail

51.

As a part of the water cycle, water from Earth's surface enters the clouds and finally falls back to the ground in the form of rain. What is the correct sequence of processes water undergoes?

a)

Evaporation, Condensation, Precipitation

b)

Precipitation, Condensation, Evaporation

c)

Condensation, Evaporation, Precipitation

d)

Evaporation, Precipitation, Condensation

52.

What would happen if the Sun is removed from the water cycle?

a)

The water cycle would not include precipitation but would continue with groundwater flow.

b)

The water cycle would no longer occur because the Sun provides the energy for evaporation and transpiration.

c)

The water cycle would no longer occur because the Sun provides energy for the formation of clouds.

d)

The water cycle would not include evaporation and transpiration but would continue with condensation.

53.
During which stage do clouds form?
a)
condensation
b)
evaporation
c)
precipitation
54.
Which stages does liquid water from the ocean turn into water vapor?
a)
condesantion
b)
evaporation
c)
precipitation
d)
run off
55.
Which stage does ground water try to return to the ocean or soak into the ground?
a)
condensation
b)
evaporation
c)
precipitation
d)
run off
56.
Plants use _____________ to make their own food during photosynthesis.
a)
water
b)
energy from the Sun
c)
CO2
d)
water, energy from Sun, CO2
57.

A gas produced by animals during respiration that plants use for photosynthesis.

a)

Oxygen

b)

Toots

c)

Carbon dioxide

d)

Water vapor

58.

Plants and animals are interdependent of each other.

a)

True

b)

False

59.

________________ could increase the amount of oxygen in the air.

a)

Building more houses

b)

Burning more oil

c)

Paving more streets

d)

Planting more trees

60.
Which statement is an example of how plants and animals depend on each other?
a)
animals provide food for plants
b)
animals provide water for plants
c)
animals provide oxygen for plants
d)
animals provide carbon dioxide for plants
61.
Animals use oxygen for _____________.
a)
breathing
b)
creating food
c)
making glucose
d)
transpiration
62.
The carbon dioxide-oxygen cycle is best defined as-
a)
the process in which plants use energy from the sun to make their own food
b)
a green substance in plant leaves that captures energy from the sun
c)
living things
d)
the movement of carbon dioxide and oxygen between organisms and the air
63.
Which statement is true about the carbon dioxide-oxygen cycle?
a)
animals breathe in nitrogen and release oxygen which is used by plants
b)
animals breathe in oxygen and release carbon dioxide which is used by plants
c)
animals breathe in nitrogen and release carbon dioxide which is used by plants
d)
animals breathe in carbon dioxide and release oxygen which is used by plants
64.
How plants and animals interact in the CO2/O cycle?
a)
Plants release O into the atmosphere which animals inhale. Animals exhale CO2 into the atmosphere which is breath in by plants.
b)
Animals release O into the atmosphere which plants inhale. Plants exhale CO2 into the atmosphere which is breath in by animals.
c)
Plants and animals don't need each other.
d)
Plants and animals take in O and release CO2.
65.

According to this diagram, plants use nitrogen to make _________________________

a)

carbohydrates

b)

cellulose

c)

proteins

d)

unsaturated fats

66.

True or False. The nitrogen in the atmosphere is in the right form for living things to use.

a)

True

b)

False

67.

This can transform nitrogen in the atmosphere into a usable form of nitrogen

a)

rain

b)

ice

c)

lightning

d)

sun

68.

What is the role of decomposing bacteria in the nitrogen cycle?

a)

change Nitrogen gas into Nitrate

b)

Return the nitrogen compounds to the soil

c)

Turn nitrogen into water

d)

Turn nitrate into nitrogen gas

69.

We need nitrogen to make

a)

proteins

b)

enzymes

c)

cells

d)

all of these

70.

How does fertilizer affect the nitrogen cycle

a)

the bacteria reproduce quicker

b)

cause nitrous oxide, a greenhouse gas, to enter the atmosphere and trap heat

c)

create large algae blooms in the water

d)

cause the nitrogen fixing bacteria in the soil to be less productive

71.

Where can nitrogen fixing bacteria be found

a)

Free living in the soil

b)

under the leaves of flowering plants

c)

in the atmosphere

d)

living on the nodules of certain plants

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