The atom has three particles, electron, neutron and __________.

Irregular reflection of light is called:

• Iffusion

• Diffusion

• Refraction

• Illusion

Electrons rotate around the nucleus in ___________.

A mixture that has a consistent colour and texture is called a _______________ mixture.

• Homogeneous

• Heterogeneous

Concrete is an example of ___________ mixture.

• Heterogeneous

• Homogeneous

Fossil Fuels burn and produce ________ which contributes to global warming.

• Oxygen

• Nitrogen dioxide

• Carbon dioxide

• Water

The method that can be used to separate soluble solid from a solution is called?

• Filtration

• Distillation

• Evaporation

Filtration is a technique used to separate an __________ solid from a mixture.

Which of the following is an example of a chemical change?

• rusting of a bicycle
• painting a house
• washing a dog
• tearing up a newspaper

Some chemical reactions produce thermal energy, they are called _____________ reactions.

• Endothermic

• Exothermic

• Neothermic