Nearly all energy we use on the Earth starts with energy from the Sun. The Sun powers wind, tides, and the water cycle The Water Cycle • Energy from the Sun (1) causes water from the sea to evaporate (2). … Continue reading →
Chemical change The three states of matter Change in Mass The Water Cycle Heating copper sulphate Heating magnesium ribbon If a solid chemical is heated several things could happen: It could melt (change from a solid to a liquid) … Continue reading →
Chromatography Making water pure (Distillation) Purifying rock salt Something is a MIXTURE if it contains two (or more) substances that are not chemically joined together. The substances in a mixture can often be … Continue reading →
The kinetic theory states that all matter is made up of tiny particles that are constantly moving. Solid: The particles are held closely together in a regular pattern and can only just vibrate Liquid: The particles are still close together … Continue reading →
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