Abiotic vs. Biotic
Living or Nonliving
Effects on eachother
More Effects
Energy Flow
More Energy Flow
100
This is all non-living components of an ecosystem.
Abiotic factors
100
Which abiotic factor is the basis for a pond ecosystem?
Insects
Frogs
Water
Wind
Water
100
Which population would MOST likely increase if the crayfish population decreased?
Hawk
Mink
Fish
Snail
4. Snail
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
The grass would become greener
More birds would move into the fields
The hawks would eat more of the grass
There would be fewer sparrows seen in the fields
There would be fewer sparrows seen in the fields
100
Which of these is the primary source of energy in food webs?
Soil
Sunlight
Producer
Consumer
Sunlight
100
Below is a food chain from an ecosystem.
Fly→Frog→Snake→Alligator
The arrows indicate the direction of the flow of
Energy
Water
Oxygen
Carbon Dioxide
Energy
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.
200
Which of these is an abiotic element of a desert ecosystem?
Sand
Cactus
Lizard
Scorpion
Sand
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?
The fish population would increase
The grass population would increase
The number of hawks would decrease
The number of grasshoppers would decrease
The number of grasshoppers would decrease
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?
Their numbers will increase
Their numbers will decrease
They will adapt new behaviors
They will migrate to new locations
Their numbers will decrease
200
How an ecosystem benefit when leaves fall from a tree and decompose on the soil?
- Nutrients are released into the soil
Soil erosion decreases.
Carbon Dioxide is absorbed by the soil
Soil temperature decrease
Nutrients are released into the soil
200
How would energy MOST likely flow between the organisms?
Grasshopper, Frog, Snake, Hawk
Hawk, Snake, Grasshopper, Frog
Snake, Grasshopper, Frog Hawk
Frog, Grasshopper, Hawk, Snake
Grasshopper, Frog, Snake, Hawk
300
An abiotic factor that MOST influences the organisms living in salt march is
Fish
Water
Predators
Grasses
2. Water
300
Which scenario demonstrates the interaction of biotic and abiotic factors in the ecosystem?
Turtles eating crabs
Birds eating turtle eggs
Sun radiation the ocean
A turtle burying eggs in the sand
A turtle burying eggs in the sand
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?
Duck
Fish
Mouse
Snake
Fish
300
Which situation would affect an organism’s niche in a positive way?
A decrease in livable habitat
A decrease in the normal temperature
An increase in the amount of prey available
An increase in the amount of competitors for food
An increase in the amount of prey available
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
Produced when plants grow
Recycled with organisms die
Lost when animals and plants die
Formed when new animals are born
Recycled with organisms die
300
Which process will directly result in organic matter being added to the soil?
Water freezing in cracks of rocks
Glaciers carving out a valley
River water eroding banks of a stream
Bacteria breaking down dead matter
Bacteria breaking down dead matter
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?
Removing primary producers
Spraying of insecticides
Increasing runoff
Planting Flowers
4. Planting Flowers
400
Which of the following is an abiotic factor in a river ecosystem?
Dragonfly
Trout
Water
Frog
Water
400
Which would be the MOST likely effect of a large decrease in the number of woodpeckers in a forest?
Temperatures would increase
The Precipitation would increase
The number of trees in a forest would decrease
The insect population in the forest would increase
The insect population in the forest would increase
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?
They would adapt to the dry environment
They would live on other sources of water
They would move to another habitat
They would be unable to survive
They would be unable to survive
400
According to the food chain, which would represent the flow of energy through this food chain?
Producer→Decomposer→Consumer
Consumer→Producer→Decomposer
Decomposer→Producer→Consumer
Producer→Consumer→Decomposer
Producer→Consumer→Decomposer
400
The illustrations show organisms that belong to a food chain.
Owl, Sun, Grass, Mouse
Sun, Grass, Mouse, Owl
Grass, Mouse, Owl, Sun
Sun, Mouse, Owl, Grass
Sun, Grass, Mouse, Owl
500
Which is MOST likely the explanation for the decline in the deer population?
Reproduction rate stabilized
Competition for resources increases
Predator populations decreased
New food sources became available.
Competition for resources increases
500
Which of these is an abiotic element in an ecosystem?
The average yearly rainfall in the ecosystem
The types of producers found in the ecosystem
The size of a predator population in the ecosystem
The microorganisms living in the soil of the ecosystem
The average yearly rainfall in the ecosystem
500
The diagram shows a food web in an ecosystem.
The removal of which organism would result in the MOST damage to the ecosystem?
Fox
Rabbit
Grasshopper
Grass
Grass
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?
Hawks will have more snakes to eat
Fish will begin to eat grasshoppers
There will be more grasshoppers in the area
There will be more plants growing in the area
There will be more grasshoppers in the area
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?
Fungi→Bacteria→Salamanders→Guano
Bats→Guano→Flatworm→Salamanders
Salamaders→Fungi→Bacteria→Flatworms
Guano→Bacteria→Flatworms→Salamanders
Guano→Bacteria→Flatworms→Salamanders
500
A diagram of a partial food web:
Which is a food chain that makes up part of this food web?
shrub→mouse→snake→hawk
grass→grasshopper→lizard→fox
shrub→robin→lizard→hawk
grass→rabbit→snake→hawk
shrub→mouse→snake→hawk