Dust Across the Sky

In the picture

1. 1A thick dust cloud: it covers the sky and blocks most sunlight.
2. 2A wilted fern: it droops because it cannot make enough food without light.
3. 3A tree with shriveled leaves: its leaves dry out and fall as light fades.
4. 4A large dinosaur: it searches a dim landscape for plants or prey as food becomes scarce.

Examples

• After a big volcano, ash in the sky can make skies dim and cool for a while.
• If a room plant is kept in a dark closet, its leaves turn yellow and it stops growing.

Quiz: Dust Across the Sky (Age 11)

1. 1

   What can dust in the air do to sunlight for many months?

   • It can make the sunlight brighter.
   • It can block and dim the sunlight.
   • It can make the sunlight disappear forever.
2. 2

   Why does the wilted fern droop?

   • It is too cold to stand up straight.
   • It cannot make enough food without light.
   • It is getting too much water.
3. 3

   When plants struggle because there is little light, what happens to the animals that depend on them?

   • They are not affected by what happens to plants.
   • They also struggle to find enough food.
   • They can make their own food from light.

The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.