Vocabulary
Grammar
Reading Skills
Academic Verbs
Mixed Challenge
100

Choose the best word.

Trees help ______ carbon dioxide from the atmosphere, making cities healthier places to live.

A. threaten

B. absorb

C. contrast

D. attach

B. absorb

100

Choose the correct sentence.

A. The whale shark is more larger than the tiger shark.

B. The whale shark is much larger than the tiger shark.

C. The whale shark much larger than the tiger shark.

D. The whale shark is largest than the tiger shark.

B. The whale shark is much larger than the tiger shark.

100

Which sentence would most likely be the topic sentence of a paragraph?

A. For example, many forests lose thousands of trees every year.

B. Logging threatens ecosystems around the world.

C. Scientists recorded the data in 2024.

D. Many animals must move to new habitats.

B. Logging threatens ecosystems around the world.

100

Choose the best verb.

Scientists worked together to monitor endangered sea turtles.

A. contrasted

B. cooperated

C. attached

D. released

B. cooperated

100

Which sentence uses due to correctly?

A. Due to pollution, many species have become endangered.

B. Due to many species are endangered.

C. Due to endangered species.

D. Due to the ecosystem survives.

A. Due to pollution, many species have become endangered.

200

Which vocabulary word best completes the sentence?

Human activities continue to ______ many animal species by destroying their habitats.

A. cooperate

B. release

C. threaten

D. attach

C. threaten

200

Combine the sentences using whereas.

The gray squirrel is common.

The red squirrel is endangered.

Possible Answer

The gray squirrel is common, whereas the red squirrel is endangered.

200

Which sentence is the BEST supporting detail?

Main Idea:

Air pollution harms human health.

A. Pollution exists.

B. In 2023, researchers found that poor air quality increased respiratory illnesses by 18%.

C. Many people dislike pollution.

D. Pollution is bad.

B. In 2023, researchers found that poor air quality increased respiratory illnesses by 18%.

200

Complete the sentence.

Researchers carefully ______ a tracking device to the whale shark before releasing it.

A. affected

B. attached

C. survived

D. contrasted


B. attached

200

Choose the strongest academic sentence.

A. Pollution is really bad.

B. Pollution affects ecosystems by damaging habitats and threatening biodiversity.

C. Pollution is something people don't like.

D. Pollution is bad because yes.

B. Pollution affects ecosystems by damaging habitats and threatening biodiversity.

300

One word is NOT appropriate.

Burning fossil fuels releases greenhouse gases into the ______.

A. atmosphere

B. ecosystem

C. air

D. environment

B. ecosystem

(Greenhouse gases are released into the atmosphere, not directly "into an ecosystem.")

300

Correct the mistake.

Trees absorbs carbon dioxide from the atmosphere.


absorbs - Trees absorb carbon dioxide from the atmosphere.

300

Read the sentence.

The rainforest contains thousands of species that depend on one another for survival.

Which word is closest in meaning to depend on?

A. ignore

B. cooperate with

C. rely on

D. contrast with

C. rely on

300

Choose the best verb.

Rising temperatures continue to ______ ecosystems around the world.

A. affect

B. attach

C. release

D. cooperate

A. affect

300

Which sentence is most appropriate for an academic paragraph?

A. Trees are awesome!

B. Trees play a significant role in maintaining healthy ecosystems.

C. I think trees are cool.

D. Trees are nice.

B. Trees play a significant role in maintaining healthy ecosystems.

400

Complete the sentence using the BEST vocabulary word.

When forests are removed, many native plants and animals struggle to ______.

a. migrate 

b. life

c. living

d. survive


d. survive

400

Unscramble the sentence.

released / researchers / the / animal / into / the / wild / the

The researchers released the animal into the wild.

400

A paragraph begins:

Many cities are planting thousands of trees to improve air quality.

Which detail BEST supports this idea?

A. Trees are green.

B. Trees absorb carbon dioxide and release oxygen.

C. People enjoy parks.

D. Cities have buildings.


B. Trees absorb carbon dioxide and release oxygen.

400

Choose the best revision.

Original:

Scientists looked at the differences between the two species.

A. Scientists attached the two species.

B. Scientists contrasted the two species.

C. Scientists released the two species.

D. Scientists cooperated the two species.

B. Scientists contrasted the two species.

400

Choose the BEST concluding sentence.

A. Therefore, protecting ecosystems is essential for the survival of both wildlife and humans.

B. That's all.

C. Trees are interesting.

D. Many people like forests.

A. Therefore, protecting ecosystems is essential for the survival of both wildlife and humans.

500

Rewrite the sentence using endangered.

Many animal species are at risk of extinction because of habitat destruction.

Correct? (Answers may vary)

500

Rewrite the sentence using Both.

The tiger shark is a fish.

The whale shark is a fish.

Possible Answer

Both the tiger shark and the whale shark are fish.

500

Read this paragraph:

Logging removes forests that many animals depend on. As trees disappear, habitats become smaller, making it difficult for species to survive.

What is the author's purpose?

A. To entertain

B. To explain the effects of logging

C. To compare two forests

D. To describe a vacation

B. To explain the effects of logging

500

Write one sentence using BOTH cooperate and survive correctly.

Correct?

500

Your team has 90 seconds.

Create 2-3 sentences about protecting endangered species.

Your writing must include:

  • one transition (whereas, due to, therefore, or however)

Correct?