Bunsen Burners
What is a bunsen burner used for?
heating up a substance
Add them all up and divide by how many there are
What's one way to heat up an object in the lab?
hot plate or a bunsen burner
What is the equation for density?
mass / volume = Density
What's an independent variable?
The part of the experiment you manipulate / change between trials
How many types of flames does a bunsen burner produce?
2
What's the average of 100, 100, and 400?
200
Read the volume before and after you submerge the object and the difference in volume is the volume.
What do we measure mass in?
grams
What's a dependent variable?
What you're measuring.
What controls the flame height?
the needle valve
What's the equation for percent error?
Calculated - Actual Answer X 100 = Percent Error
Actual Answer
How do I read a graduated cylinder?
What do we measure volume in?
mL or L, m3 or cm3
Why is a control group or a controlled variable important?
Serves as a reference
What controls the flame color?
The air port
What are two things a good graph should have?
has a labeled x axis, has the x axis on the horizontal (side to side part) of the graph, has categories for the x axis (blue, red, purple, etc.), has a labeled y axis, has the y axis on the vertical (up and down part) of the graph, has a scale for the y axis (0, 5, 10, 15, etc.), has a title that starts by saying ‘Figure 1.’, has a title below the graph, is organized and easy to read, data is color-coded
What is the balance for?
obtaining mass
What are the units for density?
g/ mL
g/ cm3
kg / L
kg/ m3
What should you do after you have a question or have made an observation?
Do research
How should I adjust a bunsen burner to get a small orange flame?
Close the air port and almost completely close the needle valve.
Your calculated answer was 6. The correct answer is 7. What is your percent error?
-14.29%
Could I use an Erlenmeyer flask to measure volume accurately?
No
If something has a density of 0.8 g / mL, will it sink or float in water?
Float
A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. In this experiment the independent variable is
the amount of salt