Across
- 5. a pure substance that cannot be broken down into simpler substances by chemical reactions.
- 8. a state of matter without any defined volume or shape.
- 9. a subatomic particle with a negative electric charge
- 13. to prevent electricity or heat from passing through.
- 15. a subatomic particle with no electric charge, located within the nucleus of the atom.
- 17. describes a material that allow some light to travel through them.
- 18. a state of matter with a fixed volume and shape.
- 19. material that has mass and takes up some amount of space.
- 20. describes a substance that will break down another object upon contact
- 21. a measure of how many particles are packed together into a certain amount of space.
Down
- 1. the force of gravity on an object.
- 2. a particular form that matter can take, there are three main ones.
- 3. the smallest unit of an element that has the properties of that element.
- 4. substance a material with a particular chemical make up, and cannot be separated by physical means.
- 6. the center of an atom containing protons and neutron.
- 7. two or more atoms joined together.
- 10. a material that transmit energy.
- 11. a state of matter with definite volume, but no defined shape.
- 12. a subatomic particle with a positive electric charge, located within the nucleus of the atom.
- 14. describes a material through which light can travel.
- 16. the amount of matter in an object