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8Sci_ChemPhyMatter
Chemical & Physical Properties of Matter (Tabat)
| Question | Answer |
|---|---|
| What do bubbles most likely indicate in a chemical reaction? | gas formation |
| What chemical change occurs due to mixing baking soda and vinegar? | gas production |
| When frozen carbon dioxide is heated, it changes directly into a gas. What physical change has taken place? | heat caused a change in state |
| What is specific heat? | the amount of energy required to raise one gram of a substance 1 degree Celcius to identify unknown substances |
| What chemical change is most likely to involve bubbling or an odor? | gas production |
| What is needed to change ice into water? | energy |
| If you mix two clear liquids together and observe the clear liquids turning cloudy white, what has most likely occurred? | a precipitate formed |
| Batteries lose effectiveness over time because of chemical reactions that occur in the batteries. Where is the best place to store batteries to keep them for a longer period of time? | store them at room temperature |
| What is not an example of a physical change of water? | stirring |
| What is the mass of a piece of paper after it is crumbled? | the same as that of the flat paper |
| What changes occur when burning coal and boiling water? | burning coal is a chemical change and boiling water is a physical change |
| What has occurred when you have ocean water and the water has evaporated and salt was visible at the bottom of the jar? | a physical change |
| What is burning paper considered? | a chemical change |
| How would you describe the change to an ice cube as it melts? | the change is physical because the substance remains the same |
| What term best describes a chemical reaction that absorbs heat energy? | endothermic |
| What evidence is used to show a chemical change in matter has occurred? | a gas is produced |
| Baking soda and vinegar was mixed and a match was struck. Why did the lit match go out when placed in the mouth of the flask? | the baking soda and vinegar reacted to produce carbon dioxide gas. the carbon dioxide gas caused the lit match to go out |
| What can be concluded when two liquids are mixed together, a solid forms and settles on the bottom of the container? | a chemical change has taken place |
| What characteristic property of iron is most closely related to the formation of rust? | chemical reactivity |
| What best describes the solid that forms when two liquids combine in a chemical reaction? | precipitate |
| What part of digestion is mainly a chemical change? | stomach acids dissolve food into nutrients |
| What physical property of matter illustrates when liquids are placed in a beaker settle into specific layers? | density |
| What has happened when dough bakes in an oven? | a chemical change |
| What happens to a substance that changes from a liquid to a solid? | a physical change |
| What is the best evidence that a chemical reaction has occurred? | gas formation |
| What does breaking a cold pack, causing a sudden drop in temperature demonstrate? | a chemical change |
| What observation would be made if a precipitate reaction will have occurred? | cloudy solution |
| What does condensation represent? | a physical change |
Created by:
masonteach
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