Science Max: Friction Quiz

What is friction?

• A force that occurs when two objects slide past each other

• A type of sound wave

• A type of energy

• A chemical reaction

What material is used to make the simple hover disc in the experiment?

• Metal

• Glass

• Cardboard

• Plastic

Why does Phil prefer using sport bottle caps for the hover disc?

• They are made of metal

• They have a nozzle that can open and close

• They are easier to find

• They are larger in size

What problem did Phil encounter with the small hover disc?

• It was too big

• It was too noisy

• It was too heavy

• It didn't have enough air flow

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What alternative to a balloon did Helena suggest for the larger hover disc?

• A vacuum cleaner

• A fan

• A leaf blower

• A hair dryer

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Why did Phil and Helena add carpet to the ramp?

• To increase friction

• To make it softer

• To make it look nicer

• To decrease friction

What did Phil use to climb the steep ramp successfully?

• Rubber shoes

• Sandpaper

• Velcro

• Metal spikes

What was the main difference between Phil's and Helena's methods of propelling their hover discs in the race?

• Phil used a vacuum cleaner, Helena used a hair dryer

• Phil used a fan, Helena used a leaf blower

• Phil used a dust mop, Helena used rubber balls

• Phil used a broom, Helena used a mop

What did Phil demonstrate in the indoor skydiving chamber?

• The effect of gravity

• The friction of air

• The speed of wind

• The weight of objects

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Why is friction important for car tires?

• To increase speed

• To grip the road and allow turning

• To reduce noise

• To make the car look good