2.0 Heat affects matter in different ways. 2.1 States of Matter and The Particle Model of Matter. Matter is made up of tiny particles and exists in three states: solid, liquid and gas. The Particle Model of Matter is a scientific description of the tiny particles that make up all things.
The definition of a bough is the branch of a tree. An example of bough is the branch of a cherry tree. branch of a tree, esp. a main branch. Origin of bough.
In botany, the trunk (or bole) is the stem and main wooden axis of a tree, which is an important feature in tree identification, and which often differs markedly from the bottom of the trunk to the top, depending on the species. The trunk is the most important part of the tree for timber production. Trunks occur both in true woody plants as well as non-woody plants such as palms and other monocots, though the internal physiology is different in each case.