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Physical vs Chemical
Review for Physical and Chemical Changes
Question | Answer |
---|---|
Type of Change: cut your hair | Physical |
Type of Change: baking soda and vinegar mixed together | Chemical |
Type of Change: a piece of metal is bent in half | Physical |
Type of Change: baking cookies | Chemical |
Type of Change: diamond used to scratch glass | Physical |
Type of Change: a crumpled piece of paper | Physical |
Type of Change: a tree burnt to ashes | Chemical |
Type of Change: water freezes to form ice | Physical |
Type of Change: apple rotting | Chemical |
Type of Change: roasting a marshmallow | Chemical |
A ______________ has a definite shape. It does not take the shape of it's container. It also has a definite volume because it can be measured. | solid |
A ______________ does not have a definite shape. It takes the shape of it's container. It does have a definite volume because it can be measured. | liquid |
A ______________ does not have a definite shape. It sometimes takes the shape of it's container and sometimes flies freely around. | gas |
What is volume? | the amount of space that matter takes up |
What is mass? | the amount of matter an object has |
What is a physical change? | when object or substance changes only it's physical properties |
What are some examples physical properties that can change? | color, shape, size, temperature, or weight |
What is a chemical change? | when an object is changed into something completely different |
What are signs that a chemical change has happened? | new substance made, impossible to reverse, gas released, heat or light given off |
What is freezing? | when you change a liquid to a solid |
What is melting? | when you change a solid to a liquid |