anything that takes up space and has mass

• particles are packed tightly together

• cannot move past each other

• has a definite shape

• examples: books, pizza, cotton balls, ice, watermelon

• particles are close together, but can still move past one another

• particles take the shape of their container

• examples: lemonade, water, gatorade, ocean

• particles are far apart, and can move freely

• particles take the shape of their container

• examples: oxygen, helium, carbon dioxide, water vapor, steam

• a change that does NOT result in a new substance

• the color, appearance, or state of matter may change

• examples: glass breaking, carving wood, dying your hair

• a change that results in a NEW substance

• evidence of chemical changes: bubbling, heat, color change, fizzing, rust, tarnish, smell

• example: burning wood, sand turning into glass, fireworks