Chemistry revision

A green powder is heated & a gas is given off while it turns to a black solid. This describes

• Physical Change

• Chemical Change

• Change in State

• Change in Temperature

What does a chemical change result in?

• A change in state of the substance (ex. liquid to solid)

• A change in texture of the substance.

• A change in the way atoms are bonded to each other.

• A change in the appearance of the substance.

Which type of change is most often easily reversed?

• Chemical

• Physical

• Both a physical and chemical change.

• Neither a physical or chemical change.

Identify what type of change happening in the picture below...

• Chemical Change

• Physical Change

• Endothermic Reaction

• Exothermic Reaction

Identify what type of change happening in the picture below...

• Chemical Reaction

• Physical Change

• Change in State

• Change in appearance only

During Chemical Reactions, the substances that are used are called?

• Precipitate

• Corrosion

• Reactants

• Products

During Chemical Reactions, the new substances created are called?

• Precipitate

• Corrosion

• Reactants

• Products

Which of the following statements below is true?

• Copper is more ductile than brass

• Brass is more malleable than copper

• Iron is shinier than stainless steel

• Iron is more resistant to corrosion than steel

The products in this reaction are?

• Two solids

• One solid and one gas

• Three solids and a gas

• Two solids and a gas

What are the reactants in this word equation?

• Carbon dioxide and oxygen

• Carbon dioxide and water

• Oxygen and glucose

• Oxygen and water