grade 6 , con 5 , lesson 3&4

Metals ............

• don't allow heat to flow through them.

• allow heat to flow through them.

• are heat insulators.

• are bad conductors of heat.

Meteorologists are scientists who study.

• water.

• weather.

• rocks.

• cells.

Heat is transferred from a hot slide in a sunny day to your hand by........................ when you touch it.

• radiation only

• radiation and convection

• conduction only

• conduction and convection

Heat can be transferred from an electric heater to your body by when you stand near it.

• radiation

• radiation and conduction

• conduction

• conduction and convection

Heat is transferred through copper and iron by.

• radiation only.

• radiation and convection.

• conduction only.

• conduction and convection.

Thermal energy transfers from the Sun to us through the space by.

• radiation only.

• radiation and conduction.

• conduction only.

• convection and conduction.

Thermal insulators .............

• can prevent the transfer of heat completely through them.

• slow down the heat transfer through them.

• allow heat to travel freely through them.

• increase the speed of heat transfer through them.

All the following materials are considered thermal conductors, except.

• copper.

• iron.

• wood.

• aluminum.

When you put a plastic cup of water in a freezer, the water freezes and its mass.

• decreases.

• increases.

• decreases to half.

• doesn't change.

Matter................. it just changes from one state to another.

• neither be created nor destroyed

• can be created and destroyed

• can't be created but destroyed

• can be created but can't destroyed