Properties of Materials Quiz

What makes bridges so strong?

• Glue and nails

• Wind resistance

• Compressive and tensile forces

• Paint and waterproofing

Why are there small gaps between railway tracks?

• To save money on construction

• To prevent people from tripping

• To allow the metal to expand in heat

• To make room for train wheels

What would happen to railway tracks without gaps?

• They would cool down quickly

• They would expand and warp in the heat

• They would melt

• They would break into pieces

Which of the following is NOT an example of a compressive or tensile material?

• Concrete

• Bricks

• Trampoline

• Steel

Which material is elastic and stretches or bends easily?

• Concrete

• Rubber

• Bricks

• Rocks

Which item is made from elastic material?

• Chair

• Trampoline

• Wall

• Glass

At what temperature does water boil in Cape Town?

• 90°C

• 96°C

• 100°C

• 110°C

At what temperature does water boil in Johannesburg?

• 90°C

• 96°C

• 100°C

• 102°C

Why does water boil at a lower temperature in Johannesburg than in Cape Town?

• Johannesburg is hotter

• There is more water vapor in Cape Town

• Air pressure is lower in Johannesburg

• Water is purer in Johannesburg

What is the scientific definition of boiling?

• Turning from solid to liquid

• Change of state from liquid to gas

• Bubbling and fizzing

• Cooling down in the air