Safety
where are the fire extinguisher/fire blanket located in McGills classroom?
Right side of the room between the cabinets and teacher’s desk
This is the purpose of the stir rod
To stir liquids
The variable changed on purpose in an experiment
What is an Independent Variable
What number are the prefixes of the metric system based on?
what is a power of 10
10 meters in a dekameter
10 decimeters in a meter
The unit we will use if we are measuring volume out of a graduated cylinder
What is a milliliter (mL)?
What should never be worn for Lab days
Baggy/Loose Clothes
Dangly jewelry
Closed toed shoes
This is the difference between:
Beaker tongs and Crucible tongs
Beaker tongs are specifically designed to pick up beakers
Crucible Tongs can pick up many small pieces of glassware
The difference between a control group and an experimental group
What is:
Control group does not get the independent variable
Experimental does gets the independent variable
the larger unit?
1 kilometer or 1 decimeter
1 kilometer is larger
1 kilometer equals 1000 meters
There are 10 decimeters in one meter
Estimate the volume of liquid to the correct number of decimal places (slide 4)
what we know for certain 25mL
what we estimate for uncertain 25.8 mL
If an injury were to occur in lab this is the first step you should take
Tell the teacher
This is why we do not use a Beaker or Erlenmeyer flask to measure the liquids volume accurately?
The lines on these glassware are not accurate they are a rough estimate compared to the Graduated Cylinder
This is 2 control variables in the following experiment:
Mr. McGill wants to know if his plants like more or less sun, so he puts some in the window and some in the closet. After 6 months he measures the height of each plant and finds that sunlight is helpful to his plants
What are:
Same type of plants, Same number of plants Same amount of water, Same timing of watering, Same soil,Same temperature, Same time of year, Same age plant
The number of micrograms in one milligram
what is 1000 micrograms (µg)
There are 1000 micrograms in 1 milligram
Mega, Micro and Nano start skipping by 1000
The number of uncertain digits we use when making a measurement
what is One uncertain digit
When we make a measurement, we estimate one place beyond the decimal that the tool measures to
These are two things you should do the night before a lab day
what are:
Read the procedure
Get a good night's sleep
Lay out the correct clothes
What is the name and purpose of this piece of equipment (slide 2)
Name: Well Plate
Function: We can run many, small scale reactions at one time
These are the 4 parts of the scientific method
what are the:
Question/observation
Hypothesis
Experiment
Conclusion
Convert the following:
135 m ----> _______cm
135m x 100 cm / 1 m = 13500 cm
Estimate the mass from the following triple beam balance (slide 5)
what we know for certain: 373.3 g
what we estimate for uncertain: 373.32 g
This is how long you should be at the eye wash station if you get something in your eye
what is 15 Minutes
4 pieces of equipment needed to boil water in chemistry
Beaker, Evaporation dish, Bunsen burner, Striker Ring stand, Iron Ring, Wire Gauze, Beaker tongs, Crucible tongs
These are the 4 parts to a conclusion
What are the:
Purpose
What you did
Was your hypothesis correct or wrong
Supported with data
Convert the following
75920 dm -----> ________ hm
75920 dm x (1 hm / 1000 dm) = 75.92 hm
Calculate the volume of the object being measured by using displacement (slide 6)
(volume of water + Sample) - Volume of water = Volume of the sample
(volume of water + Sample) - Volume of water = Volume of the sample
27.0mL - 21.5 mL = 5.5 mL