Choose the correct words to complete the sentences. 1. Researchers often animals in order to learn about their behavior. 2. A spacesuit is when astronauts walk in space. 3. Scientists look for planets that are close in to Earth. 4. You should wear white in the summer. White clothes the heat from the sun. 5. I found your sweater my winter clothes. 6. He wants to a new kind of telescope. 7. From this spot on the mountain, we can the entire valley. 8. Much of the Arctic was covered by ice, but now there are places of open sea. 9. To the top shelf, I have to stand on a ladder. 10. When did they Saturn's moons?