| A | B |
|---|
| It has weight and takes up space | Matter |
| The three states of Matter | solid, liquid, gas |
| Matter can be..... | changed |
| Changes in size, shape or state of matter is called a | physical changed |
| If a physical change happens the object | looks different but is still the same matter |
| These are examples of a physical change | haircuts, slicing bread, breaking class, melting ice |
| True or false: when salt melts ice it is a chemical change | false |
| Why does salt melt ice | because it lowers the freezing point but doesn't change the matter |
| When two or more materials are mixed an there is a reaction changing the type of matter we call this | a chemical reaction |
| After mixing two substances, the matter does not look or act the same as it did before you mixed it. This is a | chemical change |
| True or false: when a chemical change occurs you can not easily split the materials back into the pre-mixed form | True |
| Heat can cause | physical and chemical changes |
| What is needed for physical and chemical changes to occur? | Energy |
| Combining vinegar and salt makes a new materia to | shine pennies |
| Baking a cake and spoiling food are | chemical change |
| The amount of matter in an object is | Mass |
| Water freezes and becomes ice at | 32 degrees Farenheit |
| When water boils... | it becomes water vapor |
| liquid boils at | 100 degree C (212 F) |
| Evaporation is | when water is heated and changes to water vapor |
| Condensation occurs when | water vapor cools and changes to water |
| melting is when | a solid becomes a liquid |
| A solid becoming a liquid , a liquid becoming a gas, a gas becoming a liquid are all examples of | changes of state |
| Sound is louder trveling througha | solid because molecules are closer together |
