Organisms and Ecosystems

Trapping and hunting has greatly reduced the population of snakes. What is the most likely effect of this change in the ecosystem?

• The population of frogs will increase

• The population of mice will decrease

• The population of ants will increase

• the population of frogs will decrease

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

In the food web, if the population of grasshoppers increased, what would be a result?

• The population of rabbits would decrease

• The population of lizards would decrease

• The population of snakes would increase

• The population of grass would increase

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What is the difference between a food chain and a food web?

• A food chain is larger than a food web

• A food chain is the combination of all the food webs in an ecosystem

• A food web is smaller than a food chain

• A food web is the combination of all the food chains in an ecosystem

In this food web, energy flows from —

• the hawk to the grass to the snake and the rabbit

• the grass to the hawk to the rabbit

• the grass to the grasshopper to the toad

• the grasshopper to the toad to the sparrow

Tags

NGSS.MS-LS2-3

Which organisms would contain the greatest amount of available energy?

• rabbits and deer

• grasses and shrubs

• lice

• hawks

Tags

NGSS.MS-LS2-3

Ryan built a biotic community by adding water plants, snails, small fish, and water to a large jug. Which best represents the energy flow in this biotic community?

• I and II only

• II and III only

• I and IV only

• II and IV only

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

NGSS.MS-LS2-3

In the food web diagram, which TWO organisms are secondary consumers?

• Rabbit, Snake

• Hawk, Grasshopper

• Lizard, Snake

• Hawk, Lizard

Tags

NGSS.MS-LS2-3

The picture below shows an energy pyramid. What will most likely happen to the foxes and the wolves if the rabbits are removed?

• The foxes will eat more wolves.

• The foxes will eat fewer wolves.

• There will be more foxes and wolves.

• There will be fewer foxes and wolves.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The picture shows the energy flow through a meadow community. Which of the following would most likely occur to the populations within the community of organisms immediately after a wild fire burns the environment?

• Hawks would increase and foxes would increase.

• Hawks would decrease and foxes would increase.

• Meadow plants would increase and rabbits would decrease.

• Meadow plants would decrease and rabbits would decrease.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which statement best describes the flow of energy as it passes through the organisms in the pyramid?

• Energy flows through the organisms from bottom to top and increases at each level.

• Energy flows through the organisms from bottom to top and decreases at each level.

• Energy flows through the organisms from top to bottom and increase at each level.

• Energy flows through the organisms from top to bottom and decreases at each level.

Tags

NGSS.MS-LS2-3