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Chemical changes
| Question | Answer |
|---|---|
| __________changes produce substances that have new and different properties. | Chemical |
| Name at least three signs of a chemical change. | Color, temperature change, light, a gas is produced, new odor, or a powdery solid settles out. |
| Rust, or iron oxide, is an example of a ______. | compound |
| A _____________ is a chemical combination of two or more substances. | compound |
| A new compound being produced is due to a _______ change. | chemical |
| Which is the element and which is the compound? Sodium and salt | Salt is the compound, and Sodium that helps to make salt is the element. |
| The links that hold molecules and compounds together, like holding hands, are called | bonds |
| What chemical properties are produced when you add vinegar to steel wool? | Color change- It turns a rusty color Heat is produced A gas is let off |
| Chemical reactions that give off heat are said to be.... | exothermic |
| Chemical reactions can also absorb energy, and temperature drops because of this. These reactions are said to be | endothermic |
| When you mix baking soda and vinegar together in a bottle and attach a balloon to it, the balloon inflates. What new compound is produced? | carbon dioxide gas, that's what!! |
| Bonds holding a chemical together would be a _____ change. | chemical of course! Hi Sydney! |
| Physical change or Chemical change? Your body digesting food | chemical |
| Physical change or Chemical change? Burning paper? | Chemical, ash being produced, odor etc. |
| Physical change or Chemical change? Cutting paper into the cutest paper snowflakes | physical |
| Physical change or Chemical change? Freezing | physical, nothing new is produced |
| Physical change or Chemical change? When you bake a cake or cookies? | chemical, gas is produced when the batter is heated up. |
| Physical change or Chemical change? When pennies tarnish or the Statue of Liberty starts to turn green | chemical, color change |
| Physical change or Chemical change? Water freezing | physical, same substance, just changing state |
| A group of tightly bonded atoms acting like a single particle? m.................... | molecule |
| Chris thinks that melting would be a _______ change. | Physical of course. |
| Making compounds, creating new substances, and making molecules would be examples of a ________ change. | chemical |
| A change creating odor would be a ____ change. | chemical |
| Baking soda and vinegar in a bottle with a closed lid measures 35 grams. I chake bottle and it creates c. dioxide gas. I retake the mass. Will it be more now? | NO, matter can't be created or destroyed. Molecules were just rearranged. Mass stays the same in a chemical change. |
Created by:
mrsyoung
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