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- 1. Fill in the Blank
a piece of equipment that is sent into space around the Earth to receive and send signals or to collect information
- 2. Fill in the Blank
one part of a situation
- 3. Fill in the Blank
the layer of gases around the Earth (or other planets)
- 4. Fill in the Blank
the appearance of an area of land
- 5. Fill in the Blank
a large area of flat land
- 6. Fill in the Blank
a unit for measuring angles, shown by the symbol ° written after a number
- 7. Fill in the Blank
to want to know something or to try to understand the reason for something
- 8. Fill in the Blank
a powder of dirt or soil that you see on a surface or in the air
- 9. Fill in the Blank
an area of low land between hills or mountains
- 10. Fill in the Blank
a tool that is used for doing something
- 11. Fill in the Blank
to discover or notice something
- 12. Fill in the Blank
a fact that shows something exists or is true
- 13. Fill in the Blank
extremely big
- 14. Fill in the Blank
to make something happen or exist
- 15. Fill in the Blank
new discoveries and inventions
- 16. Fill in the Blank
a scientist who studies astronomy
- 17. Fill in the Blank
to include the things that are needed for a particular purpose
- 18. Fill in the Blank
relating to the most important or main part of something
- 19. Fill in the Blank
something that is needed or demanded
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