Answer:
1.A star is a luminous ball of gas, mostly hydrogen and helium, held together by its own gravity
2.a large natural elevation of the earth's surface rising abruptly from the surrounding level; a large steep hill
3.an instrument for writing or drawing, consisting of a thin stick of graphite or a similar substance enclosed in a long thin piece of wood or fixed in a metal or plastic case
4.A computer is a machine that can store and process information.
5.Technology is the result of accumulated knowledge and application of skills, methods, and processes used in industrial production and scientific research
6.a group of one or more parents and their children living together as a unit
7. the physical world and everything in it It is one of the most beautiful creatures found in nature.
8.A flood is an overflow of water that submerges land that is usually dry.
9.A forest is a complex ecological system in which trees are the dominant life-form.
10.an institution for educating children.
