PISA PRACTICE

What is the author's main purpose in this passage?

• To explain how multitasking improves brain power

• To warn readers about the dangers of digital devices

• To describe why multitasking may not be effective

• To compare brain functions in children and adults

According to the passage, what happens during 'switch cost'?

• The brain permanently forgets previous tasks

• There is a delay as the brain shifts between tasks

• People become faster at completing all tasks

• Focus is increased for each task

Which part of the brain is involved in multitasking?

• The hippocampus

• The visual cortex

• The prefrontal cortex

• The cerebellum

What is the main idea of the passage?

• Coral reefs are the most reliable way to measure climate.

• Scientists use various methods to learn about past temperatures.

• Tree rings are more accurate than thermometers.

• Ice cores contain large amounts of greenhouse gases.

What does the term 'proxy data' refer to?

• Modern tools for measuring temperature

• Data collected only from ice cores

• Evidence used to infer past climate conditions

• Coral fossils from tropical oceans

Why might wider tree rings suggest warmer years?

• Warmth allows more growth

• Cold weather preserves trees

• They grow faster in winter

• It means the soil was frozen

What is a key advantage of reusable rockets?

• They are made from recycled plastic.

• They require no fuel.

• They lower the cost of space missions.

• They fly without human control.

What is the author's tone in the passage?

• Skeptical

• Excited

• Critical

• Informative

What does the phrase 'mark a significant shift' suggest?

• The rockets are identical to old ones.

• A major change is happening in space travel.

• Rockets will no longer be used.

• SpaceX owns all future missions.

What problem do the bacteria help solve?

• Overuse of antibiotics

• Ocean acidification

• Plastic pollution

• Air pollution from factories