Ecosystems & The Food Web - Unit Assessment

Scientists think that Tyrannosaurus rex was able to run at a speed of 12 miles per hour. Where did T. rex get the energy that it used to run when it was alive?

• T. rex got its energy from Triceratops. That energy is not connected to the Sun.

• T. rex got its energy from green plants, which got their energy from the Sun.

• T. rex got its energy from eating Triceratops. Triceratops ate green plants and green plants got their energy from the Sun.

• T. rex got its energy directly from the Sun.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Explain to Diego why carnivores would go extinct without the Sun.

• Carnivores rely on herbivores, which depend on plants that need sunlight to grow.

• Carnivores can photosynthesize in the absence of the Sun.

• Carnivores do not need the Sun as they can survive on water alone.

• Carnivores can directly consume sunlight for energy.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

3. Which of the following correctly represents a food chain in a forest ecosystem?

• Oak tree -> Squirrel -> Hawk

• Squirrel -> Oak tree -> Hawk

• Hawk -> Squirrel -> Oak tree

• Oak tree -> Hawk -> Squirrel

Tags

NGSS.MS-LS2-3

Scientists are worried that a disease that kills oak trees will spread into this forest. What would happen to this ecosystem if all the oak trees suddenly disappear? Choose all correct answers.

• If there aren’t any oak trees, the squirrels will not have anything to eat. They will need to find another food source or they will not survive.

• If there aren’t any oak trees, the robins will not have anything to eat. They will need to find another food source or they will not survive.

• If there aren’t any oak trees, the hawks may not have anything to eat because the squirrels and robins may not survive.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Amir released some pet frogs into the forest ecosystem shown above. These frogs eat earthworms and crickets. Hawks, robins, and squirrels do NOT eat these frogs. What will happen to this ecosystem if the frogs start living here? Choose all correct answers.

• The dead leaves will pile up because the frogs will eat all the decomposers. The decomposers will not be there to eat the leaves.

• The squirrels will not have anything to eat. They will need to find another food source or they will not survive.

• The robins will not have anything to eat. They will need to find another food source or they will not survive.

• The hawks will not have anything to eat. They will need to find another food source or they will not survive.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

What did Ana find out with her experiment? True or False The plant weighed more during the experiment.

• True

• False

Tags

NGSS.MS-LS1-5

What did Ana find out with her experiment? True or False The plant weighed the same at the start and end of the experiment.

• True

• False

Tags

NGSS.MS-LS1-5

What did Ana find out with her experiment? TRUE or FALSE The soil weighed the same at the start and end of the experiment.

• TRUE

• FALSE

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What did Ana find out with her experiment? True or False The soil weighed less at the end of the experiment.

• True

• False

Tags

NGSS.5-PS1-2

Do you think Ana should be worried about the cost of soil for her plant store?

• Yes, because the cost of soil is increasing rapidly.

• Yes, because the quality of soil affects plant growth.

• Yes, because the experiment shows the the plant "eats" a lot of soil when it grows.

• No, because the experiment shows that the plant does not "eat" the soil when it grows.

Tags

NGSS.MS-LS2-1