Material Changes

The following statement relating to physical change is

• new substance formed

• no new substance formed

• wood burning

• fireworks going off

A change in substance that has different properties from the previous substance is called ...

• physical change

• chemical change

• biological change

• biochemistry change

Making toast is

• physical change

• chemical change

• biological change

• geographical change

Naila will make sweet iced tea. He took the sugar and then mixed it in the tea. These event is

• physical change

• chemical change

• metaphysic

• biological change

Mother cooks water in the kitchen. Seen the water evaporates. These event is ...

• physical change

• chemical change

• biological change

On the beach there is a salt field. The salt comes from sea water which then crystallizes after being exposed to sunlight. In the event of making salt, it is ... change

• physical

• chemical

• biological

• biochemistry

Burning is a chemical reaction. The substance that is burnt combine with ...

• oxygen

• carbon

• hydrogen

• magnesium

The product formed in a chemical reaction have different properties from the

• reaction

• reactant

• reabsorb

• reactase

magnesium + hydrochloric acid → magnesium chloride + hydrogen

What are the reactant in the first word equation above?

• magnesium

• hydrochloric

• hydrogen

• acid

magnesium + hydrochloric acid → magnesium chloride + hydrogen

The following are reactants, except

• magnesium

• hydrochloric acid

• hydrogen