| A | B |
|---|
| sedimentation | the process of rock fragments being built up in layers called sediments |
| compaction | the process in which sediments are squashed and water is squeezed out so that salt crystals are formed |
| cementation | the process by which crystals form a glue that sticks or cements the rock pieces together |
| sedimentary rock | rocks made from layers of compressed sediment |
| magma | molten rock (underground) |
| igneous rock | rock that is formed from cooled magma or lava |
| metamorphic rock | rocks that are made when sedimentary or igneous rocks are put under pressure or heated so that they change their internal structure |
| rock cycle | the gradual changing and recycling of rocks through weathering , erosion, etc. |
| pH | a measure of the acidity or alkalinity of a substance; measured on a scale of 0 to 14 |
| radiation | the transfer of heat energy by waves |
