Show:
Lab Safety and Equipment
The Metric System and Measuring
The Scientific Method
Density/Liq. Density PBA
Density Calculations
100
What piece of equipment would you use to accurately measure the volume of 20mL of water?
Graduated Cylinder
100
convert 1m to mm
1000mm
100
Once you ask a question, or state a problem, what is the next step in the scientific method?
Develop a hypothesis
100
What was the independent variable in the liquid density experiment?
The different types of liquid
100
What is the density of a block with a volume of 10 cubic centimeters and a mass of 20grams
2 g/cm3
200
When do you need to wear goggles in the lab?
when working with heat, chemicals or glass
200
Convert 0.5L to mL
500mL
200
After you've completed your experiment and analyzed your data, what is the next step of the scientific method?
Determine if your hypothesis was, or was not supported.
200
In the Liquid Density Lab, you used a bar graph to display your data. Name 3 things you needed to include on your graph.
-Title -Axis Labels -Numbers with Appropriate Scale on the Y axis -Liquid Names on the X axis -Appropriate Units
200
What is the density of a liquid with a volume of 20mL and a mass of 30g
1.5 g/mL
300
Where is the fire extinguisher, and when should you use it?
Next to the smart board; only use it when putting out a fire on lab equipment or other non-living things
300
Convert 200cm to hm
What is 0.02 hm
300
What's the definition for independent variable?
The variable in the experiment that is changed to test its effects. (What did I change? How did I make my groups different)
300
If Liquid A has a density of 1.3g/mL, and Liquid B has a density of 0.8g/mL, what will happen when they are combined?
Liquid B will float on top of Liquid A
300
Calculate the mass of an ice cube with a density of 0.95g/cm3 and a volume of 4 cubic centimeters.
3.8 grams
400
What piece of equipment should you use to accurately measure the mass of an object?
Triple Beam Balance
400
Convert 0.05kg to dkg
5 dkg
400
Why is it importance to use controlled variables/constants?
You want to be sure that the independent variable is the only difference between your experimental groups, and is the only thing impacting your results.
400
How does the density of an inflatable beach ball change as it is inflated?
The density decreases. As it's inflated, the volume increases but the mass doesn't change (or only changes by a very small amount). Since D = M/V, a larger volume means a lower density.
400
Calculate the volume of a bowling ball with a mass of 600g and a density of 2.0 g/cm3
300 cm3
500
During the liquid density lab, what were you supposed to do with your leftover lab materials?
Pour them into the waste bin at the front of the room. Dispose of them according to the teacher's instructions.
500
Find the volume of the plastic pieces at your table.
10 cubic centimeters
500
Define the independent variable, dependent variables and one constant for the following experiment: Mary wants to determine if certain dog foods will cause weight gain. She feeds Brand X to a group of dogs and Brand Y to a different group of dogs and tracks their weight once a week for 6 weeks.
IV - The different foods DV - Their weights Constant/controlled variables: The amount of each food, the types and sizes of dogs, the level of activity that each dog gets, the age of the dogs, etc.
500
You pour Liquid A with a density of 1.5g/mL in a beaker. You then add Liquid B with a density of 0.7g/mL. If you drop a cube with a density of 1.0g/mL into the beaker, what will the cubes position in the beaker be?
The denser liquid will sink to the bottom, and the lighter will float on top. Since the cube is more dense than Liquid B, but less dense than Liquid A, the cube will sink until it hits Liquid A and will stay in the middle of the beaker.
500
Calculate the density of a block based on the following information: Length = 10cm, Width = 5cm, Height = 4cm Mass = 100 grams
0.50 g/cm3