Consequence and Uses of Thermal Expansion

What causes long railways eventually become bended?

• Railway expand in hot weather

• Railway become damaged by trains

• Rains affect the shape of railway

• Earthquake damages the railway

Tags

NGSS.MS-PS3-4

How are railways built as a consequence of thermal expansion?

• There are gaps in railway tracks

• They are build using stronger metal such as steel

• They use material that does not expand

How are bridges built as a consequence of thermal expansion?

• There are gaps and roller in bridges

• They build it large to prevent thermal expansion

• They use material that does not expand

Tags

NGSS.MS-ETS1-1

Why are the consequence of thermal expansion on electric power lines?

• They are hanged loosely

• They use thick cable

• They cover the power lines with insulation

What happen to the electric power lines if it is NOT hanged loosely?

• During hot weather or daytime, it will expand and breaks.

• During hot weather or daytime, it will shrink and breaks.

• During cool weather or night time, it will expand and breaks.

• During cool weather or night time, it will shrink and breaks.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which of this is NOT the uses of thermal expansion?

• Riveting

• Bimetallic strip

• Liquid-in-glass thermometer

• Gaps in railway tracks

How does liquid-in-glass uses thermal expansion to work?

• As the temperature increase, the liquid inside expand.

• As the temperature increase, the metal part of the thermometer pushes the liquid up.

• As the temperature increase, the glass of thermometer expand and pushes the liquid up.

Tags

NGSS.MS-PS1-4

How does thermal riveting works?

• The hot metal acts like a glue that hold two objects together.

• The hot metal that connects two object become small when it cools down which holds two objects tightly.

• The hot metal combined two objects together like a stapler

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

Which of the following does NOT use bimetallic strip?

• Fire alarm

• Electric iron

• Bridges

How does fire alarm works?

• When there are fire, it gives energy to the circuit and rings the bell.

• When there are fire, the heat causes the bimetallic strip to bend which connects the circuit and rings the bell.

• When there are fire, it moves the bimetallic strip which connects the circuit and rings the bell.

• When there are fire, it moves the alarm hand which rings the bell.