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Space Junk Introduction

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Space Junk Introduction

You are a space-safety investigator. Read the information, inspect the orbit diagram and solve the challenges. Space junk is human-made material left in orbit around Earth, such as inactive satellites, used rocket stages and fragments. Natural space rocks are not space junk.

Spot the space junk

Use the mission briefing: space junk is human-made material left in orbit. Natural objects are not space junk.

1.Which object is space junk?
  • A working satellite sending weather information
  • An inactive satellite still circling Earth
  • The Moon
  • A meteor travelling through space
2.Tick every item that could be space junk left in orbit around Earth.
  • A used rocket stage
  • A broken piece of an old satellite
  • A natural asteroid
  • A tiny fragment from a spacecraft collision

Follow the evidence

A satellite is a human-made object sent into space. Orbit is the path an object follows around another object, such as Earth. Debris means scattered pieces or remains.

3.Match each source of debris with what happened.
  • Old satellite
  • Rocket stage
  • Small fragment
  • Broke off when objects collided
  • Stopped working but remained in orbit
  • Was left behind after carrying a spacecraft upwards
4.Complete the explanation: A collision between two objects in orbit can make more space junk because…
5.True or false? Every object in orbit is space junk, including working satellites.
TrueFalse

Keep space useful

Satellites help people on Earth with services such as communications, weather observations and navigation. Debris can damage working spacecraft and create risks for astronauts.

6.A tiny fragment is on a path near a working satellite. Give one reason this could be a problem.
7.Choose the best plan for reducing future space junk.
  • Leave used rocket stages wherever they end up
  • Design missions to avoid creating debris and safely remove or dispose of spacecraft at the end of their use
  • Send more objects into orbit without tracking them
  • Break old satellites into smaller pieces
8.An old satellite is no longer useful. Suggest one responsible action a space team could plan for before launch to reduce the chance it becomes long-lasting debris.
9.Imagine you are briefing a younger space-safety team. Write two sentences explaining what space junk is and why it matters.
10.Complete the sentence with the best science word: The path an object follows around Earth is its .

3 printable pages

  • Space Junk Introduction, page 1 of 3: Spot the space junk

    Page 1

  • Space Junk Introduction, page 2 of 3: Follow the evidence, Keep space useful

    Page 2

  • Space Junk Introduction, page 3 of 3: 7. Choose the best plan for reducing future space junk.

    Page 3

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