Science revision

Heat stroke is an uncontrolled increase in your body temperature.

Hypothermia is when your body is exposed to low temperatures for a long period of time. Your body then can't replace heat as fast as it is being lost.

Causes:

• Exercising in very warm conditions
• very high humidity and dehydration

Symptoms

• confusion
• red/dry skin
• low blood pressure
• convulsions
• fainting
• rapid heartbeat

Sympotoms:

• grey skin colour
• amnesia
• shivering
• slurred speech
• confusion
• loss of co-ordination
• cold skin