________ was a Greek philosopher known for his doctrine of "Change is central to the Universe"

• Aristotle

• Heraclitus

• Plato

• Socrates

If energy is released, it is called an ______ reaction

__________ is the simplest hydrocarbon molecule.

• Oxygen

• Hydrogen

• Methane

• Carbon dioxide

When attacked, the _________ unleashes bursts of hot chemical spray accompanied by audible detonations.

__________ is an example of an endothermic reaction.

• Respiration

• Photosynthesis

• Oxidation of metals

• Baking

____________ is a branch of physics that studies the energy changes that occur through any chemical reaction.

The minimum amount of energy required for molecules to react with each other is called ______ energy.

A _____ is a substance that increases the rate of a chemical reaction.

What is used to reduce the polluting effects of a car's exhaust fumes?

What is the function of the enzyme 'Lipase'?

• to break down proteins

• to break down fats

• to break down fibre

• to break down starch