Physical Science (2)

5. ____ transfers heat by the actual movement of hot particles of a fluid.
7. A ____ is the smallest multi-atom particle of an element or compound that can exist in the free state and still retain the characteristics of the element or compound.
9. ____ is the simplest method of heat transfer. It is accomplished by direct contact.
10. Any wave, including light, that bounces off a flat, smooth barrier follows the law of ____, which states that the angle of incidence is equal to the angle of refection.
12. The ____ represents the number of an element's protons.
13. Individual atoms of an element may be found in a couple of slightly different sizes, which are referred to as ____.
15. The elements in a column are called a ____, which have the same number of electrons in their outer shell.
17. An ____ atom is the smallest component of an element that still retains the properties of the element.
18. ____ occurs when electromagnetic waves transmit heat.
19. An ____ is an electrically charged atom.
20. ____ energy is possessed by a moving object.

1. An ____ is pure type of matter that cannot be separated into different types of matter by ordinary chemical methods.
2. When atoms are rearranged into new combinations, resulting in different kinds of molecules, a ____ reaction has taken place.
3. ____ energy is stored in an object as a result of its position, shape, or state.
4. gas -> liquid
6. ____ is measured in hertz (Hz).
8. gas -> solid
10. The ____ index is the ratio by which light is slowed down.
11. solid -> gas
14. The different rows of elements are called ____, which correspond to the shells around the atom.
16. A ____ transition occurs when matter switches from one state of matter to another.