7th Grade Unit 2 Assessment: Interdependence and Energy Flow in Ecosystems

Last updated over 5 years ago

20 questions

1

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7th Grade Unit 2 Assessment: Interdependence and Energy Flow in Ecosystems

Last updated over 5 years ago

20 questions

1

Draggable item		Corresponding Item

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Draggable item		Corresponding Item

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Draggable item		Corresponding Item

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Draggable item		Corresponding Item

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The word ecosystem refers to

biotic factors in an environment

the biotic and abiotic factors in an environment

abiotic factors in an environment

none of the above

Determine which items are biotic and abiotic.

Plant
Air
Sunlight
Animals
Rocks
Water

Biotic
Abiotic

The orginal source of energy for most ecosystems is

grass

humans

the Sun

heat

Identify the animal in this food web that obtains nutrients directly from producers.

foxes

frogs

caterpillars

trout

Match each to create a true statement.

Draggable item		Corresponding Item
Some animals eat only other consumers. They are called		producers.
Plants make their own food. They are called		herbivores.
Some animals eat only producers. They are called		carnivores.

If the population of snakes decreased, what population would most likely increase most rapidly?

caterpillars

frogs

trout

grasses

How does energy move in the food web picture?

from cod to phytoplankton

from zooplankton to squid

from elephant seal to squid

from killer whale to leopard seal

Small organisms that eat and break down dead things are called

producers

omnivores

consumers

decomposers

Examine the picture. Predict the type of interaction that is shown in the picture between a bee and a flower.

competitive:  the bee competes with the flower for pollen

mutualistic:  the bee receives pollen and the flower gets help with its reproduction

predatory:  the bee is a predator which consumes the flower

parasitic:  the bee is a parasite, harming the flower when it takes the flower's pollen

Which of the following is the explanation for the trend seen in the graph above.

The population is decreasing over time because less people are having children.

The population is increasing over time because severe weather has reduced the space available for people.

The population is increasing over time because resources, such as food and space, are plentiful for everyone.

The population is decreasing over time because resources, such as clean water, are limited and people are competing for resources.

An organism that gets energy from both plants and animals is called a(n)

carnivore

detritivore (decomposer)

herbivore

omnivore

When 2 or more organisms are trying to obtain the same resources (food, water, shelter), they are in what relationship?

predation

parasitism

competition

commensalism

What is a close relationship between 2 different species?

symbiosis

commensalism

mutualism

parasitism

Mosquitoes love to suck your blood! What type of symbiotic relationship is this?

commensalism

mutualism

parasitism

None of these

Below are five ecological relationships. Match the picture that represents each relationship.

Draggable item		Corresponding Item
Commensalism
Competition
Parasitism
Mutualism
Predation

Rabbits 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?

Rabbits have a high death rate.

Rabbits have few effective predators.

Additional rabbit species have been introduced.

There is an increase in rabbit competitors.

Read the passage below and answer the question.
Birds
Peter observed different birds around his home such as Eastern bluebirds, tree swallows, and starlings living in trees. He decided to study their different interactions. Peter remembered in class that Eastern bluebirds and tree swallows compete for places to live (called nesting sites). In competing for these nesting sites, the tree swallows often win. The starlings do not compete for these nesting sites because starlings cannot fit inside the nesting sites of bluebirds and swallows.
Every day for 5 months, Peter observed and counted the Eastern bluebirds, tree swallows, and starlings in nesting sites around his house. Using this data he created this graph.

Using the graph and the knowledge about nesting interactions of these birds, identify which species (A, B, C) on the graph represents each type of bird.

Draggable item		Corresponding Item
Species C		Eastern bluebirds
Species A		Tree swallows
Species B		Starlings

Draggable item		Corresponding Item

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

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

same/same

most/least

most/same

The word ecosystem refers to

biotic factors in an environment

the biotic and abiotic factors in an environment

abiotic factors in an environment

none of the above

Determine which items are biotic and abiotic.

Plant

Air

Sunlight

Animals

Rocks

Water

Biotic

Abiotic

The orginal source of energy for most ecosystems is 

grass

humans

the Sun

heat

Identify the animal in this food web that obtains nutrients directly from producers.

foxes

frogs

caterpillars

trout

Match each to create a true statement.

Some animals eat only other consumers. They are called 

producers.

Plants make their own food. They are called 

herbivores.

Some animals eat only producers. They are called

carnivores.

If the population of snakes decreased, what population would most likely increase most rapidly?

caterpillars

frogs

trout

grasses

How does energy move in the food web picture?

from cod to phytoplankton

from zooplankton to squid

from elephant seal to squid

from killer whale to leopard seal

Small organisms that eat and break down dead things are called 

producers

omnivores

consumers

decomposers

Examine the picture.  Predict the type of interaction that is shown in the picture between a bee and a flower.

competitive:  the bee competes with the flower for pollen

mutualistic:  the bee receives pollen and the flower gets help with its reproduction

predatory:  the bee is a predator which consumes the flower

parasitic:  the bee is a parasite, harming the flower when it takes the flower's pollen

Which of the following is the explanation for the trend seen in the graph above.

The population is decreasing over time because less people are having children.

The population is increasing over time because severe weather has reduced the space available for people.

The population is increasing over time because resources, such as food and space, are plentiful for everyone.

The population is decreasing over time because resources, such as clean water, are limited and people are competing for resources.

An organism that gets energy from both plants and animals is called a(n)

carnivore

detritivore (decomposer)

herbivore

omnivore

When 2 or more organisms are trying to obtain the same resources (food, water, shelter), they are in what relationship?

predation

parasitism

competition

commensalism

What is a close relationship between 2 different species?

symbiosis

commensalism

mutualism

parasitism

Mosquitoes love to suck your blood! What type of symbiotic relationship is this?

commensalism

mutualism

parasitism

None of these

Below are five ecological relationships. Match the picture that represents each relationship.

Commensalism

Competition

Parasitism

Mutualism

Predation

Rabbits 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?

Rabbits have a high death rate.

Rabbits have few effective predators.

Additional rabbit species have been introduced.

There is an increase in rabbit competitors.

Read the passage below and answer the question. 
Birds 
Peter observed different birds around his home such as Eastern bluebirds, tree swallows, and starlings living in trees. He decided to study their different interactions. Peter remembered in class that Eastern bluebirds and tree swallows compete for places to live (called nesting sites). In competing for these nesting sites, the tree swallows often win. The starlings do not compete for these nesting sites because starlings cannot fit inside the nesting sites of bluebirds and swallows.
Every day for 5 months, Peter observed and counted the Eastern bluebirds, tree swallows, and starlings in nesting sites around his house. Using this data he created this graph.

Using the graph and the knowledge about nesting interactions of these birds, identify which species (A, B, C) on the graph represents each type of bird.

Species C

Eastern bluebirds

Species A

Tree swallows

Species B

Starlings

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

D - hawks

producers

C - snakes

primary consumers

A - grass

secondary consumers

B - rabbits

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

same/same

most/least

most/same