Unit 1
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29 terms
Terms | Definitions |
|---|---|
 What do you do when your caught on fire? | Stop, Drop, and Roll |
| what is a theory ? | A theory is a well tested explanation for a broad set of observations and experiments. |
| Independent Variable | Factors that can be altered by the experimenter. |
| Procedure | A step by step process used to collect data in an experiment. |
| Variables | Factors that are investigated during an experiment. These are researched and explained. |
| Conclusion | Summery of the findings for an experiment. |
| Hypothesis | An educated guess as to what the cause of something or the outcome of an experiment. |
| Dependent Variable | Factor that changes in response to something the experimenter changed. |
| Experiment | A carefully designed study to explore the effects of one thing on another. |
| What is matter? | Anything that has mass and takes up space. |
| An Element | The simplest form of matter that can't be chemically broken down. |
| Compounds | Composed of two or more elements and can be chemically broken down. |
| Give an example of a heterogeneous mixture. | Soil, Sand, Granite |
| Give an example of a homogeneous mixture. | Shampoo, Salt water |
| Length | the distance between two points and measured in meters. |
| Volume | The amount of space something takes up, measured in liters. |
| Temperature | measure of an average molecule motion, measured in Celsius. |
| Mass | Amount of stuff in something, measured in grams. |
| What is the first rule to Sig. Figs? | 1. All non-zero numbers are significant. |
| Physical Change | A change in state, chemical make-up doesn't change. |
| Chemical Change | Change in chemical composition, atoms rearrange to make a new substance. |
| What is accuracy? | How close you get to the actual value. |
| What is precision? | How spread out the data is. |
| What is a solid? | Ordered and dense, has a definite shape and volume. slightly compressible. |
| What is a liquid? | Disordered and usually slightly less dense. Has a definite volume and takes the shape of the container. Slightly compressible. |
| What is gas? | Disorderly and much lower density than a crystal or a liquid. Does not have a definite shape and volume. Highly compressible. |
| What is the second rule to Sig. Figs? | All zeros between non zeros are significant. |
| What is the third rule to Sig. Figs? | 3. Trailing zeros are only significant if the number has a decimal point. |
| What is the fourth rule to Sig. Figs? | 4. Zeros before the first non-zero digits are NOT significant. |
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