1. Mr. Dawson’s Science Unit Created by: Mrs. Coliadis Oct. 2010

2. The ability of matter to combine with other matter and form a NEW substance with DIFFERENT properties than the original substance

3. A trait of matter that we can observe without causing any change to the object: color, hardness, size, shape and taste are examples

4. Any characteristics of an object that can be described by using our senses or measured with tools

5. Anything that has mass and takes up space

6. The amount of space that matter takes up

7. A unit of measure used in the metric system; a unit of mass The symbol for gram is g.

8. The pull of the force of gravity on an object

9. The natural “tools’ of seeing, hearing, tasting, touching and smelling that we use to make observations

10. A safe way to smell unknown substances by waving air molecules toward your nose with your hand

11. When matter changes in shape, size, or phase but remains the same substance

12. When matter changes and the change causes the substance to become a new or different substance

15. Phase of matter in which the molecules are most closely attracted to each other. An ice cube is the solid phase of water.

16. The phase of matter that has no definite shape, but has definite volume. Water is a liquid—ice that has melted is a liquid.

17. The phase of matter that has no definite shape or volume and the molecules have the most motion.

18. The melting point of water (from liquid to gas)

19. The freezing point of water (from liquid to a solid)

20. The temperature at which a liquid changes to a gas

21. The temperature at which a gas turns back into a liquid

22. Matter formed by molecules in long chains (rubber and silly putty are examples)

23. The property used to describe how an object feels when touched

24. The property of an object that makes it attract iron

25. The property used to describe how an object shines in the light

26. The tiny particles that make up matter