EVERYDAY SCIENCE

Detailed explanation-1: -A wood chipper converts the tree limbs or trunks into smaller wood chips. The wood does not undergo a chemical change, but only a physical change. Changes in mass or texture of the wood only affect its physical properties, but it does not lead to a change in its chemical composition.

Detailed explanation-2: -Cutting a tree is a physical change because it can be regained if we grow back the trees part which were removed off.

Detailed explanation-3: -The burning of wood leads to the formation of new substances like ash(carbon), carbon dioxide gas, water vapour, heat and light. This change is irreversible and hence a chemical change. While cutting wood into smaller pieces is a physical change as there is no change in the original composition of wood.

Detailed explanation-4: -Melting ice and grinding wood into sawdust are examples of physical changes.

Detailed explanation-5: -Growth of a tree is both a physical change as well as a chemical change. This is because growth of a tree involves changes in overall shape and size of the tree (tree on growing becomes bigger in size and its branches spread out).