Science. T5. Heat and light

At what speed does light travel?

• 300.000 km/second

• 300.000 €/second

• 300.000 km/hour

• 300.000 steps/second

When thermal energy is applied to a liquid...

• it changes into solid

• it changes into another liquid

• it changes into gas

• it expands

When light hits a mirror, we see a...

• refraction

• reflection

_________ light is made of all the colours of the rainbow (ESCRIBE UNA PALABRA)

A ________ is a material that transfers thermal energy easily

• conductor

• insulator

How does light energy travel?

• Convection

• Conduction

• Chemical changes

• Radiation

Rainbows appear when light from the Sun is reflected by ______ (ESCRIBE UNA PALABRA)

The process of changing from a solid to a liquid as a result of an increase in thermal energy is called.....

• evaporation

• chemical changes

• melting

• conduction

A material that blocks light completely is called...

• opaque

• translucent

• transparent

• insulator

A curtain is an example of a material that is...

• opaque

• translucent

• transparent

• conductor