Life Science Review

Multiple Choice

Which would most likely cause a decrease in a population of herbivores?

• an increase in producers

• a decrease in decomposers

• an increase in plants

• an increase in carnivores

Multiple Choice

Which type of animal usually eats both producers and consumers?

• omnivores

• carnivores

• herbivores

• predator

Multiple Choice

This is a food chain that includes grass, a grasshopper, and a bird. (grass --> grasshopper --> bird). How is the grass in this food chain best described?

• It is producer, because it makes it own food

• It is a producer, because it is eaten by consumers.

• It is a consumer, because it gets energy from producers

• It is a decomposer, because it breaks down sunlight.

Multiple Choice

What would most likely happen if all the decomposers in an ecosystem were removed?

• The animals in the ecosystem would die because of the spread of disease

• The plants in the ecosystem would eventually die because of a lack of nutrients in the soil

• The plants in the ecosystem would begin to die out because of a decrease in available water

• The animals in the ecosystem would eat other types of food because of a decrease in producers

Multiple Choice

A food chain in an ecosystem includes blackberry bushes, deer, and wolves. (Deer eat blackberries, wolves eat deer). If the population of wolves decreases, how will this affect the population of blackberry bushes?

• It will decrease because there will be fewer deer

• It will increase because there will be fewer deer

• It will decrease because there will be more deer

• It will increase because there will be more deer.

Multiple Choice

Which has the greatest effect on the amount of salt in a salt marsh?

• the number of animals living in the marsh

• the closeness of the marsh to the ocean

• the depth of the water in the marsh

• the temperature of the water in the marsh

Multiple Choice

What would most likely result if all plants in an area were destroyed?

• Consumer populations would increase because more sunlight would reach the ground

• Decomposer populations would increase because more sunlight would reach the ground

• Consumer populations would decrease because plants provide them with water

• Consumer populations would decrease because pants provide them with energy

Multiple Choice

Define ecosystem.

• All living and non living things in an environment.

• Only living things that grow old and decay.

• The same species in the same place at the same time.

• All the population in the same area.

Multiple Choice

What is the producer in the picture?

• water

• ducks

• clouds

• trees

Multiple Choice

Example of abiotic factor

• living things

• non living things

Multiple Choice

Eye color?

• Heredity

• Trait

• Learned Behavior

• Inate Behavior

Multiple Choice

Which of the following is an example of a consumer in an ecosystem?

• Algae

• Deer

• Mushrooms

• Grass

Multiple Choice

What is the primary energy source for ecosystems?

• Water

• Sunlight

• Soil nutrients

• Wind

Multiple Choice

Which of the following best describes a food chain?

• A process by which energy is recycled in an ecosystem

• A sequence of organisms each dependent on the next as a source of food

• A group of animals that live together

• A system of water cycles in an ecosystem

Multiple Choice

What happens to energy as it moves up the food chain?

• It increases

• It decreases

• It stays the same

• It disappears

Multiple Choice

Why are decomposers important to an ecosystem?

• They produce oxygen for animals to breathe.

• They consume living plants for energy.

• They break down dead organisms, returning nutrients to the soil.

• They capture sunlight to produce food.

Multiple Choice

What breaks down dead organisms and their waste?

• Decomposers

• dirt

• wind

• Miguel

Multiple Choice

The largest group of organisms found in a food web would be:

• Primary Consumers
• Producers
• Decomposers
• Tertiary Consumers

Multiple Choice

In this food chain, what will happen if the frogs become extinct?

• The snakes will increase.
• The grasshoppers will decrease.
• The eagles will remain the same.
• The grasshoppers will increase.

Multiple Choice

An organism that eats both plants & animals is called ______

• carnivore

• herbivore

• scavenger

• omnivore

Multiple Choice

A system of interlocking food chains in an ecosystem or ecological community is called _______

• food chain

• food web

• ecosystem

Multiple Choice

Non-living things that help sustain life in an ecosystem (i.e. dirt, temperature, rocks, water, air, sunlight) is called _______

• abiotic factor

• biotic factor

• predator

• prey

Multiple Choice

Living things that make up an ecosystem (i.e. animals, plants, and bacteria) is called _______

• abiotic factor

• biotic factor

• predator

• prey

Multiple Choice

All organisms need _____ to survive.

• Environment
• energy
• sun
• plants

Multiple Choice

_________ cannot make their own food, so they need to consume (eat) plants or animals.

• consumers
• producers
• decomposers

Multiple Choice

a _______ shows how each living thing gets food and how nutrients and energy are passed from organism to organism. 

• ecosystem
• food chain

Multiple Choice

what is bacteria or fungi considered?

• producer
• consumer
• decomposer

Multiple Choice

What is this model called?

• Food Chain

• Food Web

• Habitat

• Herbivore

Multiple Choice

Which is a fresh water ecosystem?

• river
• estuary
• ocean

Multiple Choice

Identify the ecosystem

• Forest

• Tundra

• Freshwater

• Grassland