Let´s review a bit of matter:

 Dear students:

Let´s review some of the items of matter:

• What´s a pure substance? What´s a compound substance?
• What is the difference between a pure substance and a mixture?
• What´s the difference between an element and a compound?
• What´s the difference between a homogeneous mixture and a heterogeneous mixture?
• What is the difference between a solute and a solvent?
• What is a reducing agent and an oxidising agent?
• What´s the difference between reducing and oxidising agent?

Regarding separation methods:

• Can you describe a method used to separate a mixture? 
• Can you give two examples of mixtures?
• What´s the difference between evaporation and distillation?

Regarding chemical changes:

• What´s a chemical change?
• What do we need to have a combustion or to start a fire?
• How can we extinguish a fire?
• In what ways, can we use combustion?
• Can you mention two examples of oxidation?
• What´s oxidation?

Regarding fermentation:

• How can we explain fermentation?
• Why do we need yeast in fermentation?
• How can we create bread?
• How can we create cheese?