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Lesson Worksheet: Reverse Engineering Science

In this worksheet, we will practice using reverse engineering to develop solutions with multiple parts and calculating the costs involved in the process.

Q1:

Nabil’s model plane was built incorrectly, so he took it apart.

He looked at the parts and put them back together in a different way.

What do we call the steps Nabil took?

  • AIrreversible engineering
  • BDesigning
  • CPlanning
  • DReverse engineering

Q2:

Pick the correct order of the reverse engineering process.

  • A
  • B
  • C

Q3:

Nader has a problem with his magnetic toy car. It will not work through his wooden table.

Nader uses the reverse engineering process to solve the problem.

Fill in the blank to show what he should do for the reassembling step: He puts the car back together with the magnet directly on the of the car.

  • Afront
  • Bside
  • Cbottom

Q4:

A sheep farmer’s lambs keep escaping from his field by pushing open the wooden gate. So, he designs a new magnetic gate that is strong enough to stay shut when the lambs push it. It has an iron post and three strong magnets to keep it shut.

The farmer wants to work out the cost of each of the materials he needs. He uses the given cost sheet.

ItemNumber of ItemsCost of Each Item (LE)Total Cost (LE)
Magnet35
Iron Post11111

How much will the magnets cost him?

Q5:

A sheep farmer’s lambs keep escaping from his field by pushing open the wooden gate. He uses the engineering design process to solve the problem.

He designs a new magnetic gate that is strong enough to stay shut when the lambs push it. It has an iron post and two strong magnets to keep it shut.

The farmer tests his new gate and finds that none of the lambs can open it except for the biggest lamb.

What can he do to improve his design?

  • ATake away one magnet.
  • BMake the whole gate from iron.
  • CAdd a third magnet.
  • DUse a plastic post.

Q6:

Read the story about farmer Nader and his lambs.

Farmer Nader is a sheep farmer. The lambs live in a field with an electric fence all the way around it. They have big metal troughs to eat from. There is a wooden gate at one end of the field. The lambs have worked out how to open the gate to the field. Farmer Nader does not know what to do to stop his lambs from getting out.

What farm item does farmer Nader have an engineering problem with?

  • AThe electric fence
  • BThe tractor
  • CThe metal troughs
  • DThe wooden gate

Q7:

Pick the reverse engineering process that is described correctly.

  • A
    Step1. Observe2. Take apart3. Reassemble
    DescriptionLook at the parts and their function.Put the parts back together differently.Take all the parts apart.
  • B
    Step1. Observe2. Take apart3. Reassemble
    DescriptionTake all the parts apart.Put the parts back together differently.Look at the parts and their function.
  • C
    Step1. Observe2. Take apart3. Reassemble
    DescriptionLook at the parts and their function.Take all the parts apart.Put the parts back together differently.

Q8:

Lobna uses reverse engineering on this windmill to make it spin faster.

Which step is the observing step?

  • AStep 1
  • BStep 2
  • CStep 3

Q9:

Nada uses reverse engineering on this windmill to make it spin faster.

Which step is the reassembling step?

  • AStep 2
  • BStep 1
  • CStep 3

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