Identifying Noun Clause - Middle School Level

Which of these sentences contains a noun clause?

• I know that coral reefs are home to many species.

• The ocean is vast and deep.

• Sharks live in the open sea.

• They study the behavior of dolphins.

Answer explanation

The clause "that coral reefs are home to many species" is a noun clause acting as the object of the verb know. It explains what I know.

Choose the correct noun clause to complete the sentence: "We are learning ________."

• how pollution affects marine ecosystems.

• to protect marine ecosystems.

• for marine ecosystems.

• about marine ecosystems.

Answer explanation

The phrase "how pollution affects marine ecosystems" is a noun clause that completes the idea of what we are learning. The other options are not noun clauses.

Which part of this sentence is a noun clause?
"Scientists are studying why coral reefs are dying off in many regions."

• Scientists are studying

• why coral reefs are dying off in many regions

• coral reefs are dying off

• in many regions

Answer explanation

The clause "why coral reefs are dying off in many regions" is a noun clause that functions as the object of the verb studying. It explains what scientists are studying.

Which sentence has a noun clause as the subject?

• What we do to protect the ocean matters greatly.

• The ocean's health depends on us.

• They teach people about marine conservation.

• Coral reefs are beautiful and fragile ecosystems.

Answer explanation

The noun clause "What we do to protect the ocean" functions as the subject of the sentence. It tells us what matters greatly.

Which sentence contains a noun clause?

• The food chain starts with plankton.

• I believe that reducing plastic waste can save marine animals.

• Sea turtles lay their eggs on sandy beaches.

• Mangroves protect coastal areas from erosion.

Answer explanation

The clause "that reducing plastic waste can save marine animals" is a noun clause acting as the object of the verb believe. It expresses what I believe.

Choose the correct noun clause to complete the sentence: "The researchers are investigating ________."

• how to protect endangered marine species.

• to protect endangered marine species.

• protect endangered marine species.

• for endangered marine species.

Answer explanation

The phrase "how to protect endangered marine species" is a noun clause acting as the object of the verb investigating. The other options do not form a complete noun clause.

Which part of this sentence is a noun clause?
"We must understand how overfishing impacts the ocean’s biodiversity."

• We must understand

• how overfishing impacts the ocean’s biodiversity

• overfishing impacts the ocean’s biodiversity

• the ocean’s biodiversity

Answer explanation

The clause "how overfishing impacts the ocean’s biodiversity" is a noun clause functioning as the object of the verb understand. It answers what we must understand.

Which of the following contains a noun clause?

• Sea otters help maintain healthy kelp forests.

• I wonder whether climate change affects marine ecosystems.

• We are working to reduce plastic waste.

• The ocean is home to millions of species.

Answer explanation

The clause "whether climate change affects marine ecosystems" is a noun clause acting as the object of the verb wonder. It explains what I wonder.