REACTIONS 1

What happens to atoms during a chemical reaction?

• Atoms are rearranged

• Atoms are destroyed

• Atoms are dissolved

• Atoms are created

Which of these is an example of a chemical reaction?

• Cooking

• Ice melting

• Water boiling

• Water freezing

True or false? It is usually very hard to reverse a chemical reaction.

• False

• True

What type of chemical reaction releases energy from a fuel?

• Decomposition

• Burning

• Neutralisation

I am the symbol that is found in the middle of a word equation.

• 
• 
• 
• 

What word is used to describe a reaction that absorbs energy from the surroundings?

• Displacement

• Endothermic

• Combustion

• Exothermic

What kind of reaction is combustion (burning)?

• Decompositioin

• Exothermic

• Endothermic

• Neutralisation

When copper carbonate is heated, it absorbs energy and breaks down into copper oxide and carbon dioxide. What kind of reaction is this?

• Combustion

• Thermal decomposition

• Exothermic

• Neutralisation

What word is used to describe the amount of matter in an object or chemical?

• Volume

• Mass

• Area

• Weight

What are the units for mass?

• meters

• Newtons

• cm

• kilograms and grams (g)