6A formatif science - chapter 2

Solids change to liquid when they are ...

The temperature at which a solid becomes a liquid is ...

Boiling is a process in which the liquid changes into ...

The changing from liquid to gas, it takes slower and doesn't produce bubbles.

There are examples of gases, except ...

• helium in a balloon

• steam from a kettle

• nitrogen in a tank

• sweet iced tea

Heat can be transferred from one object to another.

The good conductor of heat is ...

wood is not good conductor.

some materials and substances are able to conduct electricity, they are called ...

Which substances can conduct electricity?

• Metals, ionic solutions, and certain gases.
• Plastic, wood, and rubber.
• Pure water, non-metal solids, and vacuum.
• Air, oil, and sugar solutions.