|Habitat||The place or type of site where a plant or animal naturally occurs|
|Highland Boundary Fault||A major tectonic fault line running across Scotland from Helensburgh in the south–west to Stonehaven in the north–east. Separates older, igneous and metamorphic rocks to the north from younger, sedimentary and igneous rocks to the south. Has behaved as a normal and strike–slip fault in its past. Also shows characteristics of a transform fault|
|Holt||The hole/home of a badger or otter|
|Humus||Fully decomposed organic matter of well–drained soils – shows no sign of plant/animal structures. Black and slimy when wet|
This is used to measure the discharge from a river or stream. It is often used during a heavy rainfall or flood period to determine how well the watershed deals with the increased volume of water.