Unit 4 Pre-Test (2026)

Last updated 4 months ago

25 questions

Instructions

8

S7L4.b

3

5

3

5

10

3

5

3

Library

Unit 4 Pre-Test (2026)

Last updated 4 months ago

25 questions

Instructions

8

Draggable item		Corresponding Item

S7L4.b

3

5

Draggable item		Corresponding Item

3

5

10

Draggable item		Corresponding Item

3

5

Draggable item		Corresponding Item

5

3

8

Ecosystems are made up of both biotic and abiotic factors. This picture shows some biotic and abiotic factors in a desert ecosystem.

A.) Identify one biotic factor in the ecosystem.
B.) Identify one abiotic factor in this ecosystem with which the biotic factor you named in PART A interacts.
C.) Explain why it is important for the biotic factor to interact with the abiotic factor you identified in Part B.

Match the definition with the vocabulary word

Draggable item		Corresponding Item
Eats or breaks down dead things		Heterotroph
Gets energy by eating other organisms. Another name for consumer		Omnivores
Eats only plants		Carnivores
Eats both plants and animals		Autotroph
Collects energy to produce their own food		Primary Consumer
Eats only animals		Decomposers

What organism is at the middle of the pyramid. Letter B.

producer

primary consumer

secondary consumer

tertiary consumer

Why is an ecological pyramid smaller at the top than at the bottom?

90% of energy is transferred between organisms

only 10% of energy is transferred between organisms

only 50% of energy is transferred between organisms

100% of energy is transferred between organisms

Grass has 10,000 calories. How many calories would the grasshopper receive?

100

0.1

1000

10

Match the vocabulary to the definition

Draggable item		Corresponding Item
Biotic		Relationship where both organisms benefit
Abiotic		Relationship where one organism benefits and the other is neither helped nor harmed
Mutualism		Relationship where one organism harms another
Parasitism		Nonliving factors in the environment like temperature and nutrients levels
Commensalism		Living factors in the environment like plants, animals, and bacteria

How do producers get energy?

plants

meat

scraps of already killed organisms

convert sunlight into useable energy

Look at the food web below to answer the following question:

Which organism is both a primary and secondary consumer?

red tailed hawk

grouse

deer

butterflies

Look at the food web below to answer the following question:

What would happen to the hawk population if there was a decrease in grouse population?

the hawk population will decrease

the hawk population will remain the same

the hawk population will increase

Look at the food web below to answer the following question:

Which two organisms are in competition?

grouse and hawk

bear and red-tailed hawk

deer and grouse

butterfly and berry

Remora fish can attach themselves to larger aquatic animals, such as whales. When the whales eat, the fish detach themselves and eat leftover scraps of food. These fish do not harm or help the whales.
What is the ecological relationship between the remora fish and the whales?

predation

parasitism

commensalism

competition

Match the definition and symbol to the correct symbiotic term

One organism benefits while the other is neither helped nor harmed
+/+
+/0
One organism harms another
Both organisms benefit
+/-

Mutualism
Parasitism
Commensalism

Match the term to the definition

Draggable item		Corresponding Item
Community		A single organism (a tiger)
Ecosystem		A group of the same organisms (a group of tigers)
Population		Two or more populations living in the same organism (tigers and zebras )
Biosphere		A community interacting with the nonliving environment (tigers, zebras, trees, the weather all living together)
Organism		All life, land, water, and air on earth

Define Competition

one organism kills and eats the other

long term interaction where two species live with or on each other

two organisms go after or fight for the same limited resources

An interactions where both species benefit from the relationship

Define Symbiosis

a parasite lives on or in another organism and benefits from the interaction while the host is harmed

two organisms go after or fight for the same limited resources

long term relationship where two species live with or on each other

one organism kills and eats the other

Birds follow wildebeest around and eat the bugs that wildebeest dig up as they eat grass. The birds benefit by getting food and the wildebeest are not helped nor harmed. What type of relationship is this?

commensalism

parasitism

predation

competition

A tick drinks the blood of a wildebeest. The wildebeest is harmed and the tick benefits

parasitism

mutualism

competition

commensalism

Algae lives on the spider crab. The algae gets a place to live and food. The spider crab is able to blend in with the surrounding. Both benefit from this relationship.

competition

mutualism

commensalism

parasitism

Review the energy pyramid. Match the trophic level with the correct ecological term.

Draggable item		Corresponding Item
C - snakes		producers
D - hawks		primary consumers
B - rabbits		secondary consumers
A - grass		tertiary consumers

Organisms must use energy to grow, move, and perform other molecular functions. This decreases the efficiency of energy transfer from one organism to another.
As a result, organisms at the A level of the energy pyramid have the _ amount of energy available, and organisms at the D level of the energy pyramid have the amount of energy.

least/most

most/same

most/least

same/same

Rabbits were introduced into Australia over 100 years ago have become a serious pest to farmers. Rabbit populations increased so much that they displaced many native species of plant eaters. What is the MOST logical explanation for their increased numbers?

There is an increase in rabbit competitors.

Additional rabbit species have been introduced.

Rabbits have few predators.

Rabbits have a high death rate.

3

If the producer level has 5,000 units of energy, about how much energy would be available to primary consumers?

1,000 units

5 units

50 units

500 units

Tapeworms are organisms that live inside the intestines of animals, such as pigs. The worms consume partially digested food from the pigs, taking nutrients away from the pigs. In this relationship between pig and tapeworm, the pig is a–

host, and the tapeworm is a parasite.

consumer, and the tapeworm is a producer.

producer, and the tapeworm is a consumer.

predator, and the tapeworm is prey.

________ is the source of energy for almost all living things.

Food

Water

Oxygen

Sunlight

8

Ecosystems are made up of both biotic and abiotic factors. This picture shows some biotic and abiotic factors in a desert ecosystem.

A.) Identify one biotic factor in the ecosystem.
B.) Identify one abiotic factor in this ecosystem with which the biotic factor you named in PART A interacts.
C.) Explain why it is important for the biotic factor to interact with the abiotic factor you identified in Part B.

Match the definition with the vocabulary word

Eats or breaks down dead things

Heterotroph

Gets energy by eating other organisms. Another name for consumer

Omnivores

Eats only plants

Carnivores

Eats both plants and animals

Autotroph

Collects energy to produce their own food

Primary Consumer 

Eats only animals

Decomposers

What organism is at the middle of the pyramid. Letter B.

producer

primary consumer

secondary consumer

tertiary consumer

Why is an ecological pyramid smaller at the top than at the bottom?

90% of energy is transferred between organisms

only 10% of energy is transferred between organisms

only 50% of energy is transferred between organisms

100% of energy is transferred between organisms

Grass has 10,000 calories. How many calories would the grasshopper receive?

100

0.1

1000

10

Match the vocabulary to the definition

Biotic

Relationship where both organisms benefit

Abiotic

Relationship where one organism benefits and the other is neither helped nor harmed

Mutualism

Relationship where one organism harms another

Parasitism

Nonliving factors in the environment like temperature and nutrients levels

Commensalism

Living factors in the environment like plants, animals, and bacteria

How do producers get energy?

plants

meat

scraps of already killed organisms

convert sunlight into useable energy

Look at the food web below to answer the following question:

Which organism is both a primary and secondary consumer?

red tailed hawk

grouse

deer

butterflies

Look at the food web below to answer the following question:

What would happen to the hawk population if there was a decrease in grouse population?

the hawk population will decrease

the hawk population will remain the same

the hawk population will increase

Look at the food web below to answer the following question:

Which two organisms are in competition?

grouse and hawk

bear and red-tailed hawk

deer and grouse

butterfly and berry

Remora fish can attach themselves to larger aquatic animals, such as whales. When the whales eat, the fish detach themselves and eat leftover scraps of food. These fish do not harm or help the whales.
What is the ecological relationship between the remora fish and the whales?

predation

parasitism

commensalism

competition

Match the definition and symbol to the correct symbiotic term

One organism benefits while the other is neither helped nor harmed

+/+

+/0

One organism harms another

Both organisms benefit

+/-

Mutualism

Parasitism

Commensalism

Match the term to the definition

Community

A single organism (a tiger)

Ecosystem

A group of the same organisms (a group of tigers)

Population

Two or more populations living in the same organism (tigers and zebras )

Biosphere

A community interacting with the nonliving environment (tigers, zebras, trees, the weather all living together)

Organism

All life, land, water, and air on earth

Define Competition

one organism kills and eats the other

long term interaction where two species live with or on each other

two organisms go after or fight for the same limited resources

An interactions where both species benefit from the relationship

Define Symbiosis

a parasite lives on or in another organism and benefits from the interaction while the host is harmed

two organisms go after or fight for the same limited resources

long term relationship where two species live with or on each other

one organism kills and eats the other

Birds follow wildebeest around and eat the bugs that wildebeest dig up as they eat grass. The birds benefit by getting food and the wildebeest are not helped nor harmed. What type of relationship is this?

commensalism

parasitism

predation

competition

A tick drinks the blood of a wildebeest. The wildebeest is harmed and the tick benefits

parasitism

mutualism

competition

commensalism

Algae lives on the spider crab. The algae gets a place to live and food. The spider crab is able to blend in with the surrounding. Both benefit from this relationship.

competition

mutualism

commensalism

parasitism

Review the energy pyramid.  Match the trophic level with the correct ecological term.

C - snakes

producers

D - hawks

primary consumers

B - rabbits

secondary consumers

A - grass

tertiary consumers

Organisms must use energy to grow, move, and perform other molecular functions. This decreases the efficiency of energy transfer from one organism to another.
As a result, organisms at the A level of the energy pyramid have the _________________ amount of energy available, and organisms at the D level of the energy pyramid have the ________________ amount of energy.

least/most

most/same

most/least

same/same

Rabbits were introduced into Australia over 100 years ago have become a serious pest to farmers. Rabbit populations increased so much that they displaced many native species of plant eaters. What is the MOST logical explanation for their increased numbers?

There is an increase in rabbit competitors.

Additional rabbit species have been introduced.

Rabbits have few predators.

Rabbits have a high death rate.

In this food chain the __________ has the LEAST energy available to it for its life processes.

Omnivore or fish

Producer or aquatic plant

Carnivore or osprey

Herbivore or shrimp

If the producer level has 5,000 units of energy, about how much energy would be available to primary consumers?

1,000 units

5 units

50 units

500 units

Tapeworms are organisms that live inside the intestines of animals, such as pigs. The worms consume partially digested food from the pigs, taking nutrients away from the pigs. In this relationship between pig and tapeworm, the pig is a–

host, and the tapeworm is a parasite.

consumer, and the tapeworm is a producer.

producer, and the tapeworm is a consumer.

predator, and the tapeworm is prey.

________ is the source of energy for almost all living things.

Food

Water

Oxygen

Sunlight

In this food chain the __________ has the LEAST energy available to it for its life processes.

Omnivore or fish

Producer or aquatic plant

Carnivore or osprey

Herbivore or shrimp

Unit 4 Pre-Test (2026)

Unit 4 Pre-Test (2026)

Match the definition with the vocabulary word

What organism is at the middle of the pyramid. Letter B.

Why is an ecological pyramid smaller at the top than at the bottom?

Grass has 10,000 calories. How many calories would the grasshopper receive?

Match the vocabulary to the definition

How do producers get energy?

Look at the food web below to answer the following question:Which organism is both a primary and secondary consumer?

Look at the food web below to answer the following question:What would happen to the hawk population if there was a decrease in grouse population?

Look at the food web below to answer the following question:Which two organisms are in competition?

Remora fish can attach themselves to larger aquatic animals, such as whales. When the whales eat, the fish detach themselves and eat leftover scraps of food. These fish do not harm or help the whales.What is the ecological relationship between the remora fish and the whales?

Match the definition and symbol to the correct symbiotic term

Match the term to the definition

Define Competition

Define Symbiosis

Birds follow wildebeest around and eat the bugs that wildebeest dig up as they eat grass. The birds benefit by getting food and the wildebeest are not helped nor harmed. What type of relationship is this?

A tick drinks the blood of a wildebeest. The wildebeest is harmed and the tick benefits

Algae lives on the spider crab. The algae gets a place to live and food. The spider crab is able to blend in with the surrounding. Both benefit from this relationship.

Review the energy pyramid. Match the trophic level with the correct ecological term.

Rabbits were introduced into Australia over 100 years ago have become a serious pest to farmers. Rabbit populations increased so much that they displaced many native species of plant eaters. What is the MOST logical explanation for their increased numbers?

If the producer level has 5,000 units of energy, about how much energy would be available to primary consumers?

Tapeworms are organisms that live inside the intestines of animals, such as pigs. The worms consume partially digested food from the pigs, taking nutrients away from the pigs. In this relationship between pig and tapeworm, the pig is a–

________ is the source of energy for almost all living things.

In this food chain the __________ has the LEAST energy available to it for its life processes.

Look at the food web below to answer the following question:

Which organism is both a primary and secondary consumer?

Look at the food web below to answer the following question:

What would happen to the hawk population if there was a decrease in grouse population?

Look at the food web below to answer the following question:

Which two organisms are in competition?

Remora fish can attach themselves to larger aquatic animals, such as whales. When the whales eat, the fish detach themselves and eat leftover scraps of food. These fish do not harm or help the whales.
What is the ecological relationship between the remora fish and the whales?