1.5 P2 assignment

Study the diagram. Which forces do maglev trains use to levitate?

Choose all correct answers.

• repulsion

• attraction

• friction

• gravity

• magnetism

Most modern passenger trains have metal wheels that roll on metal tracks. What is the main problem that occurs because of that?

• There is very little friction between the metal wheels and the metal tracks, which can cause the train to slip or skid.

• The metal wheels wear out very quickly on metal tracks.

• The metal wheels create loud noises that disturb passengers.

Complete the missing words.

Petrus Peregrinus de Maricourt used the magnetism facts to invent his first _________.

• compass

• telescope

• barometer

• thermometer

Label the diagram:

a

b

North

South

What challenges do engineers need to think about when they look for a solution to a problem?

• Cost, Time, Material, Limits.

• Color, Taste, Smell, Texture.

• Height, Weight, Age, Gender.

• Speed, Distance, Time, Temperature.