Ecosystems EOG Review

Abiotic (Non-Living)

Biotic (Living)

Multiple Choice

Wind is

• Abiotic

• Biotic

Multiple Choice

Meerkat is

• Abiotic

• Biotic

Multiple Choice

Which of the following is a terrestrial ecosystem?

• forest

• pond

• ocean

• lake

Multiple Choice

Which of the following is an aquatic ecosystem?

• forest

• prairie

• ocean

• desert

Multiple Select

"Terrestrial" means

• land.

• water.

Multiple Select

"Aquatic" means

• land.

• water.

Multiple Choice

Which area is most likely closest to a salt marsh or an estuary?

• A. a lake

• B. a prairie

• C. a coastline

• D. the mountains

Multiple Choice

Which is a characteristic common to oceans and estuaries?

• A. contains only salt water

• B. contains only freshwater

• C. supports little to no animal life

• D. affected by the rise and fall of tides

Multiple Choice

Why are salt marshes and estuaries important for ocean life?

• A. They minimize damage to oceans during hurricanes.

• B. They filter salt out of river water before it enters the oceans.

• C. They provide safe, nutrient-rich breeding areas for ocean organisms.

• D. They increase the amount of sediment able to settle on the ocean floor.

Multiple Choice

Which organisms are most likely found in grasslands and deciduous forests?

• A. deer, brown bears, and rabbits

• B. pelicans, sea lions, and seaweed

• C. monkeys, palm trees, and snakes

• D. oak trees, squirrels, and opossums

Multiple Choice

Which is a main difference between a grassland and a forest ecosystem?

• A. The amount of trees in a grassland is greater than in a forest.

• B. The amount of trees in a forest is greater than in a grassland.

• C. The amount of salt water in a grassland is greater than in a forest.

• D. The amount of salt water in a forest is greater than in a grassland.

Population

All of the members of one species that live within an area of an ecosystem. 

Producer

A living thing that makes it's own food.

Consumer

A living thing that eats other living things. 

Decomposer

An organism that breaks down plant and animal waste and remains

Multiple Select

Select all of the producers below:

Food Chain

the transfer of energy from one organism

to another by eating and being eaten

Food Web

A system of overlapping food chains in which the flow of energy branches out in many directions

Multiple Choice

An ecosystem is a community of organisms interacting with their physical environment. Why

are decomposers an important part of ecosystems?

• A. They break down dead organisms to return nutrients to the soil.

• B. They produce their own food for survival.

• C. They play a role in preventing weathering and erosion.

• D. They provide most of the energy to consumers.

Multiple Choice

Living organisms have a role in weathering and erosion in the ecosystem. Which statement

describes the role of bacteria and fungi?

• A. They hold soil in place during high winds.

• B. They decompose organic matter in the soil.

• C. They increase water access and flow and help aerate the soil.

• D. They grow within cracks of rocks, breaking the rock into small pieces.

Multiple Choice

The main function of a producer in an ecosystem is to...

• A. absorb minerals from the soil.

• B. change water vapor into a liquid.

• C. make sugar through photosynthesis.

• D. break down dead plant and animal matter.

Multiple Choice

Which will most likely cause a decrease in predator populations?

• A. an increase in prey populations

• B. a decrease in prey populations

• C. a decrease in decomposers

• D. an increase in producers

Multiple Choice

Which gets all of its energy from the sun?

• A. producer

• B. consumer

• C. decomposer

Multiple Choice

Which best explains why producers are at the beginning of all food

chains?

• A. They turn dead animals into nutrients.

• B. They provide shelter for smaller animals.

• C. They transfer energy from the sun into food.

Multiple Choice

When an animal dies in an ecosystem a mushroom will sometimes grow

on the remains of the animal. Which best describes the role of the mushroom in the ecosystem?

• A. producer

• B. consumer

• C. decomposer

Multiple Choice

In the food web, which organisms are producers?

• A. frog and rat

• B. rat and leaves

• C. leaves and berries

Multiple Choice

In the food web below, which is an example of a consumer?

• A. tree

• B. grass

• C. rabbit

Multiple Choice

What does an arrow represent in a food chain?

• who eats what

• flow of energy

• producers

• consumers

Multiple Choice

What would fit in this food chain?

• sunlight

• ants

• giraffe

• bigger tree

Hotspot

What eats crabs? Click all that apply.

Multiple Choice

What is a role that the squirrel has in this food web?

• producer

• consumer

• decomposer

• carnivore

Reorder

Reorder the following in the order that energy is transferred in this food web.

• mangrove tree

• mangrove crab

• mudskipper

• mosquito

1

2

3

4

• 1
• 2
• 3
• 4