I. Complete the sentences with the words in the box.
crater telescope liquid creatures gravity
UFO galaxy ancient ocean rockets aliens
1. We launch things into space by putting them on _____________ with enough fuel.
2. Does _____________ water really exist beneath the ice cap at the southern pole of Mars?
3. Earth appears to be the only planet in the solar system with living _____________.
4. The _____________ observes the universe in infrared light, which is invisible to the human eye.
5. _____________ is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth.
6. The discovery of _____________ could help scientists find out whether some form of life existed on Mars.
7. Some people think that _____________ exist in the Solar System and throughout the universe.
8. A _____________ is any object flying in the sky which cannot be identified by the person who sees it.
9. Our Sun is just one star among the hundreds of billions of stars in our Milky Way _____________.
10. The largest known impact _____________ in the Solar System is a huge unnamed scar on the surface of Mars, 10,600 km long by 8,500 km wide

Question

I. Complete the sentences with the words in the box.
crater	telescope	liquid	creatures	gravity
UFO	galaxy	ancient ocean	rockets	aliens
1. We launch things into space by putting them on _____________ with enough fuel. 
2. Does _____________ water really exist beneath the ice cap at the southern pole of Mars?
3. Earth appears to be the only planet in the solar system with living _____________.
4. The _____________ observes the universe in infrared light, which is invisible to the human eye.
5. _____________ is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth.
6. The discovery of _____________ could help scientists find out whether some form of life existed on Mars.
7. Some people think that _____________ exist in the Solar System and throughout the universe.
8. A _____________ is any object flying in the sky which cannot be identified by the person who sees it.
9. Our Sun is just one star among the hundreds of billions of stars in our Milky Way _____________. 
10. The largest known impact _____________ in the Solar System is a huge unnamed scar on the surface of Mars, 10,600 km long by 8,500 km wide

Accepted Answer

Here are the completed sentences:

1. We launch things into space by putting them on **rockets** with enough fuel.
2. Does **liquid** water really exist beneath the ice cap at the southern pole of Mars?
3. Earth appears to be the only planet in the solar system with living **creatures**.
4. The **telescope** observes the universe in infrared light, which is invisible to the human eye.
5. **Gravity** is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth.
6. The discovery of an **ocean** could help scientists find out whether some form of life existed on Mars.
7. Some people think that **aliens** exist in the Solar System and throughout the universe.
8. A **UFO** is any object flying in the sky which cannot be identified by the person who sees it.
9. Our Sun is just one star among the hundreds of billions of stars in our Milky Way **galaxy**.
10. The largest known impact **crater** in the Solar System is a huge unnamed scar on the surface of Mars, 10,600 km long by 8,500 km wide.

I. Complete the sentences with the words in the box. crater telescope liquid creatures gravity UFO galaxy ancient ocean rockets aliens 1. We launch things into space by putting them on _____________ wi...