Quiz #1
IPS
IPS Lab Safety
- Goggles must be kept OVER YOUR EYES until Mr. Leeds says to put them away- even if you are already finished and cleaned up
- Report all accidents/spills to Mr. Leeds immediately
- Try you best to use common sense
Nurse- ext:2828
Safety Equipment in Classroom
- Fire extinguisher
- Fire blanket
- Eyewash/shower
Chemicals
- Never taste chemicals (even if they look yummy!)
- Always waft liquids to detect odor
- NEVER WAFT SOLIDS/POWDERS!
Glass
- Hot glass and cold glass look the same
- Never use chipped or broken glass- tell Mr. Leeds and dispose of broken glass in proper trash
- Never use force to remove or insert glass
Alcohol Burners
- Roll up sleeves, put UP long hair, Not just pull back (or you cannot do lab)
- Never walk away from a lit burner
- Never point the open end of a hot test tube at yourself or someone else
- Don't look down into a test tube/beaker while it is being heated
- Make sure burner is capped and flame is out when done
End of Experiment
- CLEAN UP AREA AND MATERIALS COMPLETELY!!!! (Or you LOSE points!)
- Make certain that burner is out if one was used
- Keep goggles on (over eyes) until Mr. Leeds says to put them away.
Reaction in a Bag
Post-Lab:
Red Liquid
- Phenol Red
- used as a pH indicator
- measures acidity
- goes from 0-14
- 0-6 is acid, 7 is neutral, 8-14 is alkaline
A-
- calcium chloride (calcium + chloride)
- acidic
- low pH
- hydotrophic- absorbs water, is attracted to water
- preserves canned vegetables
- electrolyte in sports drinks
- flavors pickles (salty)
- sodium bicarbonate (baking soda)
- not acidic
- toothpaste
- volcanoes
- laundry detergent
Heating Baking Soda
Box Questions
Q#1:
When baking soda is heated, it releases a gas that tries to escape. This helps the dough to rise in items such as bread, cookies, cupcakes, muffins, or scones.
Q#3:
50 cubic centimeters.
Q#4:
Formula- length x width x height
Box A
5x2x3=30
Box B
7x2x1=14
Q#5:
The stone is 7 cubic centimeters.
Q#6:
a. 8 cubes
b. 27 cubes
c. a= 8 cubic centimeters b= 27 cubic centimeters
Q#7:
The 2nd rectangle has a larger volume.
Q#8:
As the height increases, the surface decreases.
Q#9:
a. I- 1.3 cm
II- 3.7 cm
No, because the scale is not small enough.
b. III- 1.65
IV- 2.52
V- 4.50
No, because the scale is not small enough.
c. Because if the line is in between two marks, you want to be more accurate and have a more precise measurement.
Q#10:
a. 0.1 cubic centimeters
b. 0.2 cubic centimeters
Q#11:
a. 4 cubic centimeters
b. 1.3 cubic centimeters
Q#12:
12 cm: 11.5-12.4
12.0 cm:11.95-12.04
12.00 cm: 11.995-12.004
Q#13:
You can read decimals better- lines further apart because there is less surfaces, so you need more depth, less height, thus easier to read.
Volume
Volume
Units of measurement: cubic centimeters)Volume: l x w x h (length x width x height)
Standard units of length: meters (m)
One centimeter (i cm) = 0.01 m
100 cm = 1m
Unit cube- a small cube measuring 1cm on each end
Volume of Liquids
-use graduated cylinder to measure volume
-always check the intervals of scales
-units = milliliters
1 ml = 1 cubic centimeter
-read from the bottom of the meniscus
Using the Balances
2. Always "zero balance" before EACH MASSING
- Push all riders to zero (left)
- Use adjustment knob if needed
4. Pick up balance by red bar only
5. Do not zero balance after you are done