Science

3. A substance made up of atoms of two or more different elements joined by chemical bonds
4. generally located on the left side of the zigzag line
6. Tubes that move air from the trachea to the lungs (one is in each lung). Part of each is outside the lung and part is inside
8. A combination of two or more substances that are not chemically combined
10. A material that allows heat and electricity to pass through it.
12. A subatomic particle that has a positive charge and that is found in the nucleus of an atom
14. Another word for groups, columns of elements on the periodic table
15. Basic unit of matter

1. a testable question
2. contains protons and neutrons
5. changes with phase changes due to the difference in the particle arrangement in
7. A subatomic particle that has no charge and that is found in the nucleus of an atom
9. A subatomic particle that has a negative charge
11. Easily broken; not flexible
13. are located on the right side of the zigzag line on the periodic table.