A place for my students to get some help in Earth Science
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| Earth Science A place for my students to get some help in Earth Science |
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Tuesday, September 30, 2003 Phases, Density, and percent deviation Earth Science Make sure your name and period number are here for credit 1. Objects expand when heated. Describe what happens to density as a material is heated and mass stays the same. Remember Density= mass/volume 2. How can you determine the percent deviation if a student weighs a rock to be 59 grams and the actual mass is 55 grams. Remember Difference from accepted-accepted/accepted times 100% 3. Describe how the mass and volume of an irregular object such as a rock could be measured. 4. Three students guess that a student weighs 130, 140, 150. If Joe actually weighs 146, what is each student’s percent error? 5. If a substance is reduced to half the original volume, but the mass stays constant, what will happen to density? 6. What phases of matter tend to be most dense with water being the major exception? 7. Giving examples, describe a cyclic change? 8. How are inferences and observations made? 9. The formula to determine the rate of change is change in value/ change in time. Describe how miles/hour illustrates this formula. posted by James | 10:52 AM |
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