OpenSciEd 7.5 Ecosystem Dynamics

What is the relationship between resources and populations?

• Increase resources

  Decrease population

• Decrease resources

  Increase population

• Increase resources

  Increase population

• There is no relationship between resources and populations

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

How do orangutans help maintain the health of the tropical rainforests?

Choose all that apply!

• They spread seeds by spitting fruit seeds

• They spread seeds by defecating

• They build their homes at the base of the fruit trees.

• The orangutans do not eat fruit.

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-5

Why can the rainforest systems tolerate some disruptions that affect plants while the oil palm system cannot? Choose all that apply.

• The rainforest is a monocrop

• The oil palm is a monocrop and has only one producer

• The rainforest's biodiversity has many producers

• The rainforest has many plant and animal interactions

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-5

When does an orangutan population increase?

• When birth rate is greater than death rate

• Plenty of resources (availability is high)

• Increase in predators

• Resource availability is low

  (not enough)

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The arrows in the food web mean

• who eats who

• transfer of energy

Tags

NGSS.MS-LS2-3

Study the food web. The eagle is a(n)

• producer

• herbivore

• omnivore

• carnivore

Study the food web. The bird is a(n)

• producer

• herbivore

• omnivore

• carnivore

How do human activities alter the ecosystem and affect other species?

• Humans have no affect on the ecosystem

• They can destroy habitats by deforestation

• They can cause animal extinction

• They increase biodiversity by deforestation

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

NGSS.MS-LS2-5