Grade8 final revision 1st erm

if you mixed an acid and a base together the result is?

• oxygen

• carbon dioxide

• a salt and water

• a salt and a base

when two or more elements or compounds combine to make a more complex substance, it's called? 2Mg + O2 = 2MgO

• synthesis reaction

• compound

• Replacement

• Decomposition

The energy released as the products form is greater than the energy required to break the bonds of the reactants this reaction is called?

• endothermic reaction

• Exothermic reaction

• replacment

• synthetic reaction

which of the following is a property of a base?

• Feels slippery

• reacts with metals

• reacts with carbonate

• taste sour

The numbers in front of each component in the equation that show how many particles of the reactants and the products are needed and formed are called?

• products

• coefficient number

• reactant

• mass number

substances that undergo chemical changes are called?

• reactant

• product

substances that form from the reaction is called

• reactant

• product

a solution that has a lot of solute is called?

• dilute solution

• Concentrated solution

A solution with little solute is called?

• dilute solution

• concentrated solution

A mixture with particles that can be seen and easily separated by settling or filtration is called?

• colloid

• solution

• suspension

• compound