Working with Oceans
Adverbs and Relative Clauses
Brighter Cities and Energy
Narrative Tenses and Third Conditionals
Food and Intensifiers
100

What is one of the leading causes of damage to marine ecosystems when people catch fish faster than populations can recover?

Overfishing

100

Complete the sentence: “The activist ___ campaigned for cleaner oceans won an award.”

Who.

100

What type of energy uses sunlight to generate electricity?

Solar

100

Complete the sentence: “If humans ___ less plastic, recycling initiatives would be more successful.”

Used

100


What do we call fruit and vegetables that have not been processed into manufactured products?

Foods in their natural state
200

Name two types of pollution that can harm rivers, lakes, or aquatic life.

plastic pollution, agricultural chemicals, and industrial waste.

200

Complete the sentence: “The ocean is a place ___ many marine creatures coexist.”

Where

200


What type of energy uses heat from underground?

Geothermal

200

Complete the sentence: “If you knew more about solar energy, you ___ it immediately.”

Would choose it / Would use it

200

What substances are added to food to prevent it from spoiling quickly?

Preservatives

300

What are two important things that Chile’s rivers and lakes provide or support?

Drinking water, agriculture, and plant and animal species

300

Complete the sentence: “The winds were ___ strong that people stayed inside.”

So

300

What fuel source has contributed to global warming and is being replaced by renewable alternatives?

Fossil Fuels

300

Complete the sentence: “If we had taken more extreme measures, global warming ___ solved by now.”

Would have been 

300

Complete the sentence: “Some foods need ___ to improve and intensify their flavor.

Additives

400

Why is removing garbage from rivers and beaches not enough to protect aquatic ecosystems?

Pollution must also be prevented through regulations, responsible business practices, and public education.

400

Complete the sentence: “It was ___ a warm day that we swam for hours.”

Such.

400

Why is Chile investing in energy storage systems if it already has solar panels and wind farms?

Solar and wind power depend on sunlight and weather conditions, so storage helps save electricity for later use.

400

Complete the sentence: “If we had built more hydroelectric plants, energy ___ cheaper now.”

Would be 

400

Complete the sentence: “The food was ___ fresh that everyone wanted to try it.”

So

500

Imagine that a coastal town attracts more tourists but does not improve waste management or enforce environmental rules. Explain two possible consequences for the local ecosystem.

More waste and pollution could harm aquatic life and water quality; increased disturbance and irresponsible behavior could further damage the ecosystem.

500

Combine the sentences using a relative clause and complete the intensifier: “Solar power comes directly from the sun. It is a renewable energy source.” Then complete: “The technology was ___ expensive for the town to afford.”

“Solar power, which comes directly from the sun, is a renewable energy source.” / “Too expensive.”

500

Chile expands its solar and wind farms but does not improve energy storage. Predict one problem that could occur and explain why.

Electricity availability could become less predictable when sunlight or wind conditions change.

500

Correct the conditional sentence: “If we had recycled more plastic, oceans would be cleaner today.” Explain why your correction is necessary, if one is needed.

The sentence is already correct. It is a mixed conditional: the past condition (“had recycled”) has a present result (“would be cleaner today”).

500

Correct the sentence and explain the difference: “It was so delicious meal that everyone wanted more.”

“It was such a delicious meal that everyone wanted more.” Use such before an adjective + noun phrase; use so before an adjective alone.