TEST Ecosystem Review

Which organism is a producer in this ecosystem?

• Small Fish

• Birds

• Algae

• Frogs

Tags

NGSS.MS-LS2-3

What caused the increase in algae?

• Increased sunlight

• Fertilizer entering the lake

• More birds in the ecosystem

• Less oxygen in the water

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

Which statement best explains why fish began to die?

• Fish had too much food

• Oxygen levels decreased

• Birds stopped hunting

• Algae disappeared

Tags

NGSS.MS-LS2-4

Which organism depends directly on algae for food?

• Birds

• Large Fish

• Small Fish

• Frogs

Tags

NGSS.MS-LS2-1

NGSS.MS-LS1-6

Two students discuss a solution:

• Mateo says: “We should remove some algae from the lake.”

• Sofia says: “We should add more large fish to the lake.”

• Mateo, because reducing algae can help restore oxygen levels

• Mateo, because algae do not help the ecosystem

• Sofia, because large fish increase oxygen

• Sofia, because fish eat algae directly

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-2

Which graph best shows the small fish population over time?

• 
• 
• 
• 

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

What will most likely happen to the bird population over time?

• Increase because there are more algae

• Decrease because there are fewer large fish

• Stay the same

• Increase because oxygen increases

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS2-2

Complete the sentence:

There will be ​ (a)   small fish and​ (b)   oxygen in the lake.

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

A scientist removes algae from a water sample. What happens to the mass of the sample?

• It stays the same because algae are plants

• It decreases because algae have mass

• It increases because water is cleaner

• It stays the same because algae do not weigh anything

Tags

NGSS.MS-PS1-5

Which statement best describes the ecosystem change?

• The ecosystem became more balanced

• A nonliving factor caused changes in living organisms

• Animals adapted immediately with no effects

• Only plants were affected

Tags

NGSS.MS-LS2-4