Abiotic and Biotic Cycles

Abiotic vs. Biotic

100

This is all non-living components of an ecosystem. 

Abiotic factors 

200

Changes in abiotic factors is an environment can impact biotic factors. Which statement is the BEST example of this situation? 

A. Heavy rainfall increases soil erosion.

B.  Melting glaciers cause sea level to rise

C. Cold temperatures cause rocks to weather

D.  Drought conditions increase competition among consumers.

D.  Drought conditions increase competition among consumers.

300

An abiotic factor that MOST influences the organisms living in salt march is

1. Fish 

2. Water

3. Predators

4. Grasses

2. Water

400

 Scientists have discovered that there has been a reduction in the butterfly population in an ecosystem. After much research, they have identified that the carrying capacity for butterflies has been decreased. If the scientists want to increase the butterfly population which action should they recommend?

1. Removing primary producers

2. Spraying of insecticides

3. Increasing runoff

4. Planting Flowers

4. Planting Flowers

500

Which is MOST likely the explanation for the decline in the deer population?

1. Reproduction rate stabilized

2. Competition for resources increases

3. Predator populations decreased

4. New food sources became available. 

Competition for resources increases

Living or Nonliving

100

 Which abiotic factor is the basis for a pond ecosystem?

1. Insects

2. Frogs

3. Water

4. Wind

Water

200

Which of these is an abiotic element of a desert ecosystem?

1. Sand 

2. Cactus

3. Lizard

4. Scorpion

Sand

300

Which scenario demonstrates the interaction of biotic and abiotic factors in the ecosystem?

1. Turtles eating crabs

2. Birds eating turtle eggs

3. Sun radiation the ocean

4. A turtle burying eggs in the sand

A turtle burying eggs in the sand

400

Which of the following is an abiotic factor in a river ecosystem?

1. Dragonfly

2. Trout

3. Water 

4. Frog

Water

500

Which of these is an abiotic element in an ecosystem?

1. The average yearly rainfall in the ecosystem

2. The types of producers found in the ecosystem

3. The size of a predator population in the ecosystem

4. The microorganisms living in the soil of the ecosystem 

The average yearly rainfall in the ecosystem

Effects on eachother

100

Which population would MOST likely increase if the crayfish population decreased? 

1. Hawk

2. Mink 

3. Fish 

4. Snail 

4. Snail 

200

A pond food chain is illustrated

    Grass→Grasshopper→Fish→Hawk

What would MOST likely happen first if the producer population in this food chain were to decrease? 

1. The fish population would increase

2. The grass population would increase 

3. The number of hawks would decrease

4. The number of grasshoppers would decrease

The number of grasshoppers would decrease

300

Pond ecosystems depend on the water cycle to ensure the survival of the animals that lie in or near the pond. If a drought reduces the water level, which population of animals would be MOST affected?

1. Duck

2. Fish

3. Mouse

4. Snake

Fish 

400

 Which would be the MOST likely effect of a large decrease in the number of woodpeckers in a forest?

1. Temperatures would increase 

2. The Precipitation would increase

3. The number of trees in a forest would decrease

4. The insect population in the forest would increase

The insect population in the forest would increase

500

 The diagram shows a food web in an ecosystem.

The removal of which organism would result in the MOST damage to the ecosystem?

1. Fox

2. Rabbit

3. Grasshopper

4. Grass

Grass

More Effects

100

What will MOST likely happen to this food chain if a farmer decides to dust a wheat crop with an insecticide?

    Wheat→Insects→Sparrows→Hawks

1. The grass would become greener

2. More birds would move into the fields

3. The hawks would eat more of the grass

4. There would be fewer sparrows seen in the fields

There would be fewer sparrows seen in the fields

200

In one area, a large source of prey for eagles is rabbits. If the number of rabbits suddenly decreases, what effect will it MOST likely have on the eagle?

1. Their numbers will increase

2. Their numbers will decrease

3. They will adapt new behaviors 

4. They will migrate to new locations

Their numbers will decrease

300

 Which situation would affect an organism’s niche in a positive way?

1. A decrease in livable habitat 

2. A decrease in the normal temperature

3. An increase in the amount of prey available

4. An increase in the amount of competitors for food

An increase in the amount of prey available

400

 As a habitat with a small pond goes through a long drought, which of these is MOST likely to happen to many of the fish in the pond?

1. They would adapt to the dry environment

2. They would live on other sources of water

3. They would move to another habitat

4. They would be unable to survive

They would be unable to survive

500

 Below is an example of a food chain

        Plant→Grasshopper→Frog→Snake

If a group of foxes is introduced into this ecosystem and begins eating the frog population, what is one thing that will MOST likely happen in this food chain?

1. Hawks will have more snakes to eat

2. Fish will begin to eat grasshoppers

3. There will be more grasshoppers in the area

4. There will be more plants growing in the area

There will be more grasshoppers in the area

Energy Flow

100

 Which of these is the primary source of energy in food webs?

1. Soil

2. Sunlight

3. Producer

4. Consumer

Sunlight 

200

 How an ecosystem benefit when leaves fall from a tree and decompose on the soil? 

1. Nutrients are released into the soil

2. Soil erosion decreases.

3. Carbon Dioxide is absorbed by the soil

4. Soil temperature decrease
   
   

Nutrients are released into the soil

300

 In any ecosystem, organisms interact with biotic and abiotic parts of the environmental. As a result of all of the interactions, the matter within the system is

1. Produced when plants grow

2. Recycled with organisms die

3. Lost when animals and plants die

4. Formed when new animals are born

Recycled with organisms die

400

According to the food chain, which would represent the flow of energy through this food chain?

1. Producer→Decomposer→Consumer

2. Consumer→Producer→Decomposer

3. Decomposer→Producer→Consumer

4. Producer→Consumer→Decomposer

Producer→Consumer→Decomposer

500

Within a cave environment, bat waste products, called guano, are decomposed by organisms such as fungi and bacteria. These are then eaten by creatures such as worms. Larger animals like salamanders eat flatworms. Which correctly represents energy flow described?

1. Fungi→Bacteria→Salamanders→Guano

2. Bats→Guano→Flatworm→Salamanders

3. Salamaders→Fungi→Bacteria→Flatworms 

4. Guano→Bacteria→Flatworms→Salamanders

Guano→Bacteria→Flatworms→Salamanders

More Energy Flow

100

Below is a food chain from an ecosystem.

Fly→Frog→Snake→Alligator

The arrows indicate the direction of the flow of

1. Energy

2. Water

3. Oxygen

4. Carbon Dioxide

Energy 

200

How would energy MOST likely flow between the organisms?

1. Grasshopper, Frog, Snake, Hawk

2. Hawk, Snake, Grasshopper, Frog

3. Snake, Grasshopper, Frog Hawk

4. Frog, Grasshopper, Hawk, Snake

Grasshopper, Frog, Snake, Hawk

300

Which process will directly result in organic matter being added to the soil?

1. Water freezing in cracks of rocks

2. Glaciers carving out a valley

3. River water eroding banks of a stream

4. Bacteria breaking down dead matter

Bacteria breaking down dead matter

400

The illustrations show organisms that belong to a food chain.

12. Which lists shows the order in which energy MOST likely flows through this food chain?

1. Owl, Sun, Grass, Mouse

2. Sun, Grass, Mouse, Owl

3. Grass, Mouse, Owl, Sun

4. Sun, Mouse, Owl, Grass

Sun, Grass, Mouse, Owl

500

A diagram of a partial food web:

Which is a food chain that makes up part of this food web?

1. shrub→mouse→snake→hawk

2. grass→grasshopper→lizard→fox

3. shrub→robin→lizard→hawk

4. grass→rabbit→snake→hawk

shrub→mouse→snake→hawk