Thursday, September 23, 2010

LINK

HEre is the link to the POWERPOINT reviews we have seen in class.

http://www.slideshare.net/MRKALEMBER

Wednesday, September 15, 2010

friday sept 17 quiz

This is a sample of what some of the problems on your quiz might look like.

1. How many significant figures are in the number 12.004 ? __________

2. How many sig figs are in the number 0.00004080 ? __________

3. Convert the following. 12km = __________ cm 320 m = __________ cm

4. Rename 3.4E-5 to decimal notation ? ______________________

5. Add the following numbers using sig fig rules 12.4 + 4.5 + 8.66 + 0.0008 = ____________


6. Multiply the following number using sig fig rules. 1,200,300 x 0.0040 = ______________

7. Convert 12 kg/square meter to grams per square cm.



_______________ g/cm2

8. Rename 1203,000,000,000 to scientific notation. ___________________________

9. Convert 3.1 miles to centimeters using unit analysis. (1inch = 2.54 cm, 1 ft = 12 inches, 1 mile = 5280 feet, 1 mile = 1.61km)



____________ cm

Thursday, September 9, 2010

first quiz friday sept 10, good luck!!

here are some practice problems.

4. Convert 86 mm to km ______________________________

5. Aluminum is (circle all that are true) MATTER ELEMENT COMPOUND MIXTURE

6. Convert the following. 12mg = __________ grams 320 mm = __________ cm

7. When aluminum cans are recycled they are first melted. This a PHYSICAL CHEMICAL change.
(circle the right answer in #7)

8. _________ Which statement best describes the conclusion we found when investigating how heart rate is affected by time of exercise? A) as you exercise your heart rate increases, decreases, then increases again B) as your heart rate increases then levels off time you must exercise longer
C) as you exercise longer you breathe harder D) all of these E) none of these


9. __________ If you could break down a chunk of pure gold smaller and smaller and smaller using the world’s sharpest knife you’d eventually have a(n) A)compound B)proton C)element D)atom

10. __________Mountain Dew, the world’s best soda pop, is A) a homogeneous solution B) a heterogeneous solution C) a compound D) an element

11. I measured the length of a bug and got 12.348 mm. Which number am I “unsure” of? ________

12. You are going to conduct an experiment to find out if the pressure inside of a tire is affected by environmental temperature.
A. Which variable will be the INDEPENDENT VARIABLE? ______________
B. Which variable is the DEPENDENT VARIABLE? _________________
C. What is your hypothesis (best guess) for a conclusion for this investigation?