Space & Space Travel worksheet with a rocket illustration and fill-in-the-blank sentences.

Let's solve this worksheet step by step. The task is to complete the 15 sentences using the words provided on the left side of the page.

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Words Provided (with their meanings):

- A – alien life *n.*
- D – discover *v.*
- E – Earth *n.*
- G – gravity *n.*
- M – Mars *n.*
- K – planet *n.*
- R – rocket *n.*
- S – solar system *n.*
- T – telescope *n.*
- W – world *n.*

And also:

- astronomer *n.*
- astronaut *n.*
- distance *n.*
- explore *v.*
- spaceship *n.*

But only the ones labeled with letters (A, D, E, G, M, K, R, S, T, W) are to be used for filling in the blanks.

Let’s go through each sentence and find the best fit.

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1. Animals or plants that might live on other planets are called ________.

→ These are alien life forms.

✔ Answer: A → alien life

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2. Some people believe that there might be alien life on ________.

→ Alien life could exist on a planet.

✔ Answer: K → planet

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3. Last year, I got a ________ as a birthday present. Now I look at the stars every night.

→ Something you use to look at stars = telescope

✔ Answer: T → telescope

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4. Our ________ has eight planets.

→ The system with eight planets is the solar system.

✔ Answer: S → solar system

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5. I don't live on the moon. I live on ________.

→ We live on Earth.

✔ Answer: E → Earth

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6. ________ makes things fall down.

→ This is gravity.

✔ Answer: G → gravity

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7. When I was a kid, I wanted to grow up and be an ________ and travel in space.

→ Someone who travels in space = astronaut

Note: "astronaut" is not listed with a letter, but it's one of the words given. Since we’re told to use the words on the left, and "astronaut" isn’t labeled, perhaps it's a mistake?

Wait — looking again: The list includes:

- A – alien life
- D – discover
- E – Earth
- G – gravity
- M – Mars
- K – planet
- R – rocket
- S – solar system
- T – telescope
- W – world

But “astronaut” is listed separately, not labeled. However, the instruction says: “Complete the 15 sentences with the words on the left.” So maybe only the labeled ones are allowed?

But “astronaut” is clearly needed here.

Wait — perhaps the letters correspond to the words, and we need to pick the correct word from the list.

But “astronaut” is not labeled with a letter.

Let me recheck:

The words listed under the left column are:

- A – alien life
- D – discover
- E – Earth
- G – gravity
- M – Mars
- K – planet
- R – rocket
- S – solar system
- T – telescope
- W – world

And then additional words: astronomer, astronaut, discover, distance, explore, spaceship.

But only the first ten have letters.

So likely, the letters are clues to match the correct word, and we must use those.

But “astronaut” isn’t labeled. Hmm.

Wait — perhaps the letters A, D, E, G, M, K, R, S, T, W are just labels for the words, and we can use any of the words listed.

But the instruction says: “complete the 15 sentences with the words on the left.”

So the words on the left include:

- alien life
- astronomer
- astronaut
- discover
- distance
- Earth
- explore
- gravity
- Mars
- planet
- rocket
- solar system
- spaceship
- telescope
- world

So all 15 words are available.

But only some are labeled with letters.

Possibly the letters are just to help identify them.

So let’s proceed.

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7. When I was a kid, I wanted to grow up and be an ________ and travel in space.

→ astronaut

✔ Answer: astronaut

(Not labeled, but it's on the list.)

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8. The ________ from the Earth to the sun is about 150 kilometers.

→ Distance between two points = distance

✔ Answer: distance

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9. Galileo Galilei was a famous ________ who used a telescope to study the night sky 400 years ago.

→ He was a scientist who studied stars → astronomer

✔ Answer: astronomer

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10. Astronomers have discovered hundreds of other ________ orbiting other stars.

→ Other planets around other stars → planets

✔ Answer: planet (plural: planets)

But the word given is “planet” → so we use planet

✔ Answer: K → planet

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11. The planet Neptune was ________ in 1846. People didn't know it existed before that time.

→ It was discovered

✔ Answer: D → discover → but we need past tense? But the word is “discover”, verb.

We can use it as “was discovered”

✔ Answer: D → discover

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12. Why do people want to ________ space? Why do they want to find out what is out there?

→ To find out what's out there → explore

✔ Answer: explore

(Note: “explore” is on the list, but not labeled. Wait — did we miss it?)

Looking back:

Listed words:
- alien life
- astronomer
- astronaut
- discover
- distance
- Earth
- explore
- gravity
- Mars
- planet
- rocket
- solar system
- spaceship
- telescope
- world

Yes, “explore” is there.

But no letter. So probably we just use the word.

✔ Answer: explore

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13. ________, like the one in the picture at the top of this page, carry astronauts in space.

→ The image shows a rocket

✔ Answer: R → rocket

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14. Another word for planets is ________.

→ Planets = worlds (e.g., “other worlds”)

Or “world”?

Yes, “world” can mean a planet.

Example: “That distant world is inhabited.”

So “world” is acceptable.

✔ Answer: W → world

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15. Perhaps, humans will travel in ________ to other solar systems and planets in the future.

→ Vehicles for space travel → spaceship

✔ Answer: spaceship

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Now, let’s compile all answers:

| # | Sentence | Answer |
|---|--------|--------|
| 1 | Animals or plants that might live on other planets are called ________. | alien life |
| 2 | Some people believe that there might be alien life on ________. | planet |
| 3 | Last year, I got a ________ as a birthday present. Now I look at the stars every night. | telescope |
| 4 | Our ________ has eight planets. | solar system |
| 5 | I don't live on the moon. I live on ________. | Earth |
| 6 | ________ makes things fall down. | gravity |
| 7 | When I was a kid, I wanted to grow up and be an ________ and travel in space. | astronaut |
| 8 | The ________ from the Earth to the sun is about 150 kilometers. | distance |
| 9 | Galileo Galilei was a famous ________ who used a telescope to study the night sky 400 years ago. | astronomer |
| 10 | Astronomers have discovered hundreds of other ________ orbiting other stars. | planet |
| 11 | The planet Neptune was ________ in 1846. People didn't know it existed before that time. | discover |
| 12 | Why do people want to ________ space? Why do they want to find out what is out there? | explore |
| 13 | ________, like the one in the picture at the top of this page, carry astronauts in space. | rocket |
| 14 | Another word for planets is ________. | world |
| 15 | Perhaps, humans will travel in ________ to other solar systems and planets in the future. | spaceship |

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✔ Final Answers (with corresponding letters where applicable):

1. A – alien life
2. K – planet
3. T – telescope
4. S – solar system
5. E – Earth
6. G – gravity
7. astronaut
8. distance
9. astronomer
10. K – planet
11. D – discover
12. explore
13. R – rocket
14. W – world
15. spaceship

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✔ Explanation:

This worksheet teaches vocabulary related to space and space travel. Each sentence uses context clues to determine the correct word. For example:

- “makes things fall down” → gravity
- “carry astronauts in space” → rocket (as shown in the image)
- “another word for planets” → world (used poetically)

Some words like astronaut, astronomer, explore, discover, spaceship, and distance are not labeled with letters, but are included in the word bank. So they are valid choices.

The labeled words (A, D, E, G, M, K, R, S, T, W) are used when applicable.

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✔ Final Answer List:

1. alien life
2. planet
3. telescope
4. solar system
5. Earth
6. gravity
7. astronaut
8. distance
9. astronomer
10. planet
11. discover
12. explore
13. rocket
14. world
15. spaceship

Let me know if you'd like a printable version or explanation for any specific sentence!