Physical Science

1. the speed of an object is the magnitude of the rate of change.
7. kinetic energy of an object is the energy that it possesses due to its motion.
10. atom is the smallest unit of ordinary matter that forms a chemical element.
11. the movement caused within a fluid by the tendency of hotter and therefore less dense material.
13. energy that comes from a source and travels through space and may be able to penetrate various materials.
14. element is a pure substance consisting only of atoms that all have the same numbers of protons.
15. an electromagnetic wave which travels through the vacuum of outer space

2. change Physical changes are changes affecting the form of a chemical substance, but not its chemical composition.
3. he process by which heat or electricity is directly transmitted through a substance.
4. Newton's first law states that if a body is at rest or moving at a constant speed in a straight line.
5. change Chemical changes occur when a substance combines with another to form a new substance.
6. matter is any substance that has mass and takes up space by having volume.
8. the action or process of moving or being moved.
9. stored energy that depends upon the relative position of various parts of a system.
12. Mass is the quantity of matter in a physical body.