Study Guide IPS
Quiz- Wednesday 9/18
Reaction in a Bag two substances
-Substance B
-Substance A is Calcium Chloride, It is mildly acidic, it is hydro tropic(attracted to water, absorbs water) used in canned veggies, ( keeps then from getting mushy) electrolytes in sports drinks, flavored pickles
-Substance B is Sodium Bicarbonate (baking soda). It is not acidic.
Used in baking, tooth paste, cat litter, and laundry detergent
Baking Soda Lab
-There is a color difference between the two beakers, the heated one should be darker
-Droplets also come from the baking soda
-The condensation comes from hot gas touching cooler surface at the top of the test tube
Control Group- Unheated test tube
Experimental Factor- Heated Test tube
Indicator- Tea (Showed that heated test tube wasn't baking soda)
Variables- Something you want to measure
Independent Variable- causes a change in dependent variable- temperature
Dependent Variable- Color of the tea
Control Factors- same type of tea, same amount of baking soda, same amount of tea, same stirring time, same size of test tube,
Volume Notes
Volume= l x w x h (a x b x c)
Standard unit of length= meter
1cm=0.1m
Unit Cube= One cubic centimeter
Volume of Liquids
-Always use a graduated cylinder to measure volume
-Always check the intervals or scale
-Read from bottom of meniscus
-Units=millimeters
Single Pan Balance Notes
2. Always "zero" balance before each massing
-Push all riders to zero (left)
-Use adjustment knob if needed
3. Never switch pans
4. Pick up balance by red bar only
5. Dont zero balance when done.
Lab Safety
Hot Glass and cold glass look the same
Waft liquids
Never waft solid or chemicals
Avoid touching chemicals
Never use force to remove glass
Roll up sleeves
Never walk away from burner
Make sure burner is capped and flame is out if one was used
Box Question 3-13
4. There is a larger width
5. 7cm3
6a. 8 cubes
6b. 27 cubes
7. The second box
8. Because it is in a triangular shape so there has to be a space to fill up that space
9a. 1.20cm, 3.80cm, No
9b. 1.65cm, 2.53cm,4.50, No
9c. It is in the middle of the two tabs. It is more accurate
10a. 0.1 cubic cubic centimeters3
10b. 0.2 cubic centimeters3
11. 4.0 cm3, 1.25
12. No, 12 cm could have been rounded up or down from a number
13. It is easier to read the lines.