Ecosystem superheroes: Sea otters help keep coastal waters in check
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Last updated over 2 years ago
4 questions
1
Read the paragraph below from the section "Sea Otters Were Once Targeted For Their Thick Fur."
"The islands might seem isolated. But humans have had an influence. Beginning about 200 years ago, hunters went there. They were looking for sea otters pelts. The animals once thrived there. Back then, there were hundreds of thousands of otters."
Which word could replace "influence" WITHOUT changing the meaning of the sentence?
Read the paragraph below from the section "Sea Otters Were Once Targeted For Their Thick Fur."
"The islands might seem isolated. But humans have had an influence. Beginning about 200 years ago, hunters went there. They were looking for sea otters pelts. The animals once thrived there. Back then, there were hundreds of thousands of otters."
Which word could replace "influence" WITHOUT changing the meaning of the sentence?
1
Read the paragraph below from the section "Help Keep Kelp Forests Healthy."
"Sea otters are a keystone species. Ecosystems depend on keystone species. Sea otters keep the kelp forests healthy. This helps local species too. They include fish, mussels and microorganisms."
What is the definition of "keystone species" based on the context clues?
Read the paragraph below from the section "Help Keep Kelp Forests Healthy."
"Sea otters are a keystone species. Ecosystems depend on keystone species. Sea otters keep the kelp forests healthy. This helps local species too. They include fish, mussels and microorganisms."
What is the definition of "keystone species" based on the context clues?
1
Which section from the article gives information about WHY the number of sea otters dropped?
Which section from the article gives information about WHY the number of sea otters dropped?
1
Select the paragraph from the section "Sea Otters' Impact On Ecosystems" that explains what happened in areas that had no sea otters.
Select the paragraph from the section "Sea Otters' Impact On Ecosystems" that explains what happened in areas that had no sea otters.