Organisms Changing Ecosystems (4.ESS2.3)
🔗 Ecosystem Connections (4.LS2.3)
🐾 Adapt, Move, Survive! (4.LS2.4)
🔄 Ecosystem Shake-Up (4.LS2.4)
☀️ Energy on the Move (4.LS2.1)
100
In which example do people have a large impact on the physical characteristics of their regions?
a) Biking
b) Hiking
c) Playing
d) Farming
d) Farming
100
Which organism would function best in the habitat above?
a) Cactus
b) Rabbit
c) Penguin
d) Duck
d) Duk
100
Melissa listed a few characteristics of a desert ecossytem. What characteristic did she list incorrectly? (Which does NOT describe a desert ecosystem?)
A) little vegetation
B) low annual temperatures
C) heavy rainfall
D) nutrient-poor soil
C) heavy rainfall
100
In this food chain, which organism is the decomposer?
A) Sun
B) Rabbit
C) Clover
D) Mushroom
D) Mushroom
100
Which species would best represent organism 4 in the food chain?
a) Frog
b) Grasshopper
c) Hawk
d) Grass
c) Hawk
200
Cattle eat grass in an area for a long time, damaging the soil. How can this affect the area?
A. Damaged soil increases the animals in the area.
B. Damaged soil decreases the temperature in the area.
C. Damaged soil reduces plant growth in the area.
D. Damaged soil improves the health of the insects in the area.
C. Damaged soil reduces plant growth in the area.
200
The red wolf population in North Carolina has decreased, causing it to become endangered. Which event most likely caused this decrease?
A. Loss of habitat
B. Laws created to protect red wolves
C. A decrease in yearly rainfall
D. An increase in available food sources
A. Loss of habitat
200
In which environment is a cactus most likely found?
a) Environment 2
b) Environment 4
c) Environment 1
d) Environment 3
a) Environment 2
200
What will happen to the seal population if the shark population disappears due to overfishin in an oceanic food chain?
A. The seal population will remain unchanged.
B. The seal population will decrease.
C. The seal population will move to a new habitat.
D. The seal population will increase.
D. The seal population will increase.
200
Which organism is the food chain eats other animals, and is also eaten by otheranimals?
A) Organism C
B) Organism A
C) Organism D
D) Organism B
A) Organism C
300
A scientist compares two locations. Which claim does the data support?
A. The amount of soil lost depends on the type of plant present in the location.
B. Having plants in a location can slow down the amount of soil lost.
C. Plants grow better in locations where a large amount of soil is lost each year.
D. The amount of soil lost is higher in locations that get more rain.
B. Having plants in a location can slow down the amount of soil lost.
300
Which statement correctly explains the effect of a decrease in the number of sea otters in the food chain?
A.There would be a significant increase in the population of sea urchins and a decrease in the population of kelp.
B. There would be a significant increase in the population of sea urchins and kelp.
C. There would be a significant decrease in the population of sea urchins and kelp.
D. There would be a significant increase in the population of kelp and a decrease in the population of sea urchins.
A. There would be a significant increase in the population of sea urchins and a decrease in the population of kelp.
300
Analyze the bar graph. What can be inferred about the rabbit and fox population in the forest ecosystem?
A. There is no connection between the rabbit and fox populations.
B. The rabbit population decreased because the fox population increased.
C. The fox population increased over seven years.
D. The rabbit population decreased over seven years.
B. The rabbit population decreased because the fox population increased.
300
If soft-shelled clams that eat algae increase, which Arctic organism would be affected first?
A. Ringed seal
B. Shrimp
C. Polar bear
D. Arctic cod
B. Shrimp
300
Which organism is most important for the survival of all the other organisms?
a) trees
b) snakes
c) birds
d) beetles
a) tress
400
How does a beaver dam change the area?
A. It increases pollution in the river.
B. It causes flooding upstream.
C. It causes the beaver to hunt only fish.
D. It causes thousands of trees to be cut down.
B. It causes flooding upstream.
400
If a disease causes the beetle population to decrease significantly, how might this affect the snake population?
A. No. Beetles are not eaten by snakes in the food chain.
B. Yes. Lizards and birds, which are food for snakes, will decrease.
C. No. Snakes are the top predators and remain unaffected by changes in the food chain.
D. Yes. Snakes will have fewer beetles to feed upon.
B. Yes. Lizards and birds, which are food for snakes, will decrease.
400
Analyze the tabe below. What type of ecosytem are X and Y?
A. Ecosystem X: deciduous forest, Ecosystem Y: rainforest
B. Ecosystem X: rainforest, Ecosystem Y: grassland
C. Ecosystem X: rainforest, Ecosystem Y: deciduous forest
D. Ecosystem X: grassland, Ecosystem Y: deciduous forest
A. Ecosystem X: deciduous forest, Ecosystem Y: rainforest
400
What woud happen if the mackerel population suddenly disapparead from the ocean food chain?
A. The populations of tiny plants and tiny animals would decrease.
B. The population of tiny animals would increase, and the population of tiny plants would decrease.
C. The populations of tuna and killer whales would increase.
D. The population of tuna would increase, and the population of killer whales would decrease.
B. The population of tiny animals would increase, and the population of tiny plants would decrease.
400
Alex places mold, pear trees and deer each into a group. What is the correct match for the tree organisms?
A) pear trees: Group 3; deer: Group 2; mold: Group 1
B) pear trees: Group 1; deer: Group 3; mold: Group 2
C) pear trees: Group 2; deer: Group 3; mold: Group 1
D) pear trees: Group 1; deer: Group 2; mold: Group 3
D) pear trees: Group 1; deer: Group 2; mold: Group 3