Vocabulary # 4 Temperature and Heat

1. Kinetic energy: The energy of a moving object

2. Potential energy: Energy stored in an object or material

3. Temperature: The average kinetic energy of the molecules in a material

4. Heat: Energy that flows between objects that have different temperatures

5. Radiation: The transfer of energy by electromagnetic waves

6. Conduction: The transfer of energy by direct contact of molecules

7. Convection: The transfer of energy by the flow of a liquid or gas

8. Insulation: Prevents heat from flowing in or out of a material

Vocabulary # 3 Chemical Changes

1. Compound: A chemical combination of two or more elements

2. Chemical bond: A link that atoms or electrically charged particles can form with each other

3. Chemical formula: a way of using letters and numbers to show how much of each element is in a substance.

4. Ion: An electrically charged particle with unequal numbers of protons and electrons.

5. Molecule: A group of bonded atoms that acts like a single particle

6. Chemical property: A way of describing how a substance changes chemically with other substances.

7. Exothermic: A reaction that gives off heat

8. Endothermic: A reaction that absorbs heat

Vocabulary # 2 Elements and Atoms

1. Element: A substance that cannot be broken down any further into anything simpler.

2. Atom: The smallest particle of an element that has the same chemical properties as the element.

3. Nucleus: An atoms´s dense center, where most of it mass is.

4. Electron: A negatively charged particle that moves around an atoms nucleus.

5. Proton: a positively charged particle inside an atoms nucleus.

6. Neutron: a particle with no charge inside an atoms nucleus.

7. Atomic number: the number of protons in an atom.

8. Metal: any of a group of elements that conduct heat and electricity, is shiny and bendable.