測試一下你的PISA 科學能力～～與15歲中學生比一比

Background: Bird migration is a seasonal large-scale movement of birds to and from their breeding grounds. Every year volunteers count migrating birds at specific locations. Scientists capture some of the birds and tag their legs with a combination of coloured rings and flags. The scientists use sightings of tagged birds together with volunteers’ counts to determine the migratory routes of birds.

Birds that migrated individually or in small groups were less likely to survive and have offspring.
Birds that migrated individually or in small groups were more likely to find adequate food.
Flying in large groups allowed other bird species to join the migration.
Flying in large groups allowed each bird to have a better chance of finding a nesting site.

As a meteoroid approaches Earth and its atmosphere, it speeds up. Why does this happen? *

Background: Rocks in space that enter Earth’s atmosphere are called meteoroids. Meteoroids heat up, and glow as they fall through Earth’s atmosphere. Most meteoroids burn up before they hit Earth’s surface. When a meteoroid hits Earth it can make a hole called a crater.

The meteoroid is pulled in by the rotation of Earth.
The meteoroid is pushed by the light of the Sun.
The meteoroid is attracted to the mass of Earth.
The meteoroid is repelled by the vacuum of space.

Are You as Smart as a 15-year old?

Try These 5 PISA Questions Yourself

1) Most migratory birds gather in one area and then migrate in large groups rather than individually. This behaviour is a result of evolution. Which of the following is the best scientific explanation for the evolution of this behaviour in most migratory birds? *

As a meteoroid approaches Earth and its atmosphere, it speeds up. Why does this happen? *

3) What is the effect of a planet’s atmosphere on the number of craters on a planet’s surface? *

4) Researchers have noticed that the water that is being returned to the ocean contains a large quantity of nutrients. Adding which of the following to the farm will reduce this problem? *

5) Which procedure would make fish farming more sustainable? *

Are You as Smart as a 15-year old?

Try These 5 PISA Questions Yourself

1) Most migratory birds gather in one area and then migrate in large groups rather than individually. This behaviour is a result of evolution. Which of the following is the best scientific explanation for the evolution of this behaviour in most migratory birds? *

As a meteoroid approaches Earth and its atmosphere, it speeds up. Why does this happen? *

3) What is the effect of a planet’s atmosphere on the number of craters on a planet’s surface? *

4) Researchers have noticed that the water that is being returned to the ocean contains a large quantity of nutrients. Adding which of the following to the farm will reduce this problem? *

5) Which procedure would make fish farming more sustainable? *

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