Heat and Light

What happens with the particles of objects when they are hot?

• They melt down

• They move faster

• The move slower

• They evaporate

What kind of heat transmission is this?

• Conduction

• Convection

• Radiation

• Thermalation

What kind of heat transmission is this?

• Conduction

• Convection

• Radiation

• Boilation

How do we call the materials that don't let the heat transmit easily?

• Conductors

• Inconductors

• Insulators

• Translucent

How do we call the change of state from solid to liquid?

• subilmation

• liquidation

• condensation

• melting

Chemical changes in substances are changes caused by heat that...

• ...can be reversed

• ...can't be reversed

• ...can be reversed if you cool down the substance

• ...don't affect the substance

Which of these is a natural source of heat and light?

• A light bulb

• The oven

• The microwave

• The Sun

How do we call objects that don't let light pass through them?

• Transparent

• Translucent

• Shadower

• Opaque

Light travels...

• In straight rays, by conduction

• In waves, by convection

• In straight rays, by radiation

• In circles, by contact

What effect of light does this picture show?

• Reflexion

• Refraction

• White light

• Convection