| Question | Answer |
|---|---|
| chemical change | particles of one substance are changed in some way to form particles of a new substance |
| physical change | a change in the size, shape or state of matter that does not change the particles that make up matter |
| A change in the ______________________ of matter is a physical change. | size, shape, or state |
| A physical change does NOT change the particles that make up matter. The ____________________________, however, may be changed. | arrangement of the particles |
| Because the parts of a mixture do not change and can be separated, making a mixture is an example of a _____________________ | physical change. |
| A mixture of nuts and raisins may be separated by hand. The parts do not form a new substance. This is an example of a | physical change |
| A mixture of salt and water may be separated by evaporation–salt will be left behind. This is an example of a | physical change |
| Breaking and tearing are two other examples of… Breaking a pencil or tearing a piece of paper do not change the kind of matter in the parts. |
physical change |
| Other times, a change can form a new substance with new properties. This is called a…. | chemical change |
| Unlike a physical change, a chemical change produces a completely different_____________________ | kind of matter. |
| In a chemical change, particles of one or more substances are ________________________ to form particles of new substances with different properties. | changed in some way |
| In each case, the chemical properties of materials that were mixed… | change |
| Some chemical changes happen slowly such as food _______________ or an iron nail__________________. | decaying/rusting |
| Other chemical changes happen quickly such as wood __________________ or baking/cooking. | burning |
|
Many chemical changes give off ____________, such as the light from a burning log. |
energy |
| When cooking or baking foods, the colors, textures, and smells of the food are evidence of __________________ change. | chemical |
| The solution of vinegar (a liquid) and baking soda (a solid) produce ____________________ (a gas). | carbon dioxide |
