WHAT IS THE DENSITY OF AN OBJECT WICH HAS : MASS = 24 KG AND VOLUME = 3 M(CUBIC) ?

• 3 KG/M(CUBIC)

• 16 KG/M(CUBIC)

• 8 KG/M(CUBIC)

• 4 KG/M(CUBIC)

The ........................ is the mass ................... by the volume.

This takes place when bread is made

• good smell

• oxidation

• a sandwich

• fermentation

Chemical changes produce new substances.

• True

• False

Some chemical changes are reversible but others are not.

• True

• False

We can use filtration to separate.....

• oil and water

• sand and water

• wood and iron

Water is...

• pure substance

• heterogeneous mixture

• homogeneous mixture

the............. is the hardest material on Earth

• Ice

• Iron

• Rock

• Diamond

Copper and gold coduct.....................very well.

• electricity

• water

• magnets

• light

Some substances are ................... and others are mixtures.