Measurement
How can you measure the volume of an irregular-shaped object?
Using the displacement method you can measure the volume of irregular shaped objects.
You can do this by putting liquid into a container with measurement (graduated cylinder). Note the volume.
Place the irregular object into the graduated cylinder. Note the volume after.
Subtract the final volume from the initial.
Draw and describe the particles in a solid.
Minimal Space.
Wiggling in one place.
What is the formula for density
Density = Mass ÷ Volume
Describe 1 example in daily life where the change of density occurs intentionally
Hot air balloons use a gas burner to heat up the air particles inside the balloon. Eventually the particles are moving fast enough that some of them bump out of the balloon and cause the lift. This is a change of volume which then changes the density.
Answer will vary
Why is both accuracy and precision important when gathering data?
Accuracy and precision are important when gathering data because if your data is neither of these (close together or true value) there is a problem with your procedure or measurements.
Describe the drawing of particles in a liquid
Some space.
Sliding around each other - always touching.
D = 3 g/mL
V = 100 mL
M = ?
M = 3 x 100
= 300 g
Describe 1 example in daily life where the change of density occurs naturally.
Fresh cut wood is heavier than old dry wood due to the water content. The difference in mass makes a difference in density. We prefer dry wood because it burns better.
Answer may very
What unit is typically used to measure volume in science?
Milliliters (mL) or cubic centimeters (cm³)
Lots of space.
Move freely in all directions.
D = 0.5 g/cm3
V = ?
M = 20 g
V = 20 / 0.5
= 40 mL
What is the weight of the ethanol that exactly fills a 200.0 mL container? The density of ethanol is 0.789 g/mL.
M = 0.789 x 200
= 157.8 g