Show:
Mass
Volume and
Mass Depends on Volume Graphs
Density
Phases
Phase Changes
100
How did you find mass in the cube and cylinder activities
Use a balance. (Or a scale)
100
What is the conversion between mL and cm cubed?
1 mL = 1 cm cubed.
100
What is the density of an object that has a mass of 5.00 grams and a volume of 1.5 mL? Show the formula circle and the equation.
D = 3.33 grams/mL
100
What is the name of the phase when: a) a solid goes to a liquid b) a liquid goes to a solid?
a) melting b) freezing
100
Is each of the following changes a physical change or a chemical change? a) fungus grows on and consumes an old burrito b) You hug a momma moose for warmth
a) chemical b) physical
200
How do you find the relative mass of 2 objects if all you have is your hands? Why does this work?
Gently lift the objects up and down. You are testing the inertia.
200
Find the volume if the density = 6.00 g/cm cubed and the mass = 78.0 grams Show the formula circle and equation.
13 cm cubed
200
State the density of water in 2 different units.
1 g/mL and 1 g/cm cubed
200
What is the name of the phase when: a) a gas goes to a liquid b) a liquid goes to a gas?
a) condensation b) evaporation
200
Is each of the following changes a physical change or a chemical change? a) boil water b) let the air out of a soccer ball
a) physical b) physical
300
What is the mass if density = 9.00 g/mL and volume =30 mL. Show circle and equation.
270 grams
300
If you have a graph of Mass Depends on Volume for a material what does the slope tell you?
The slope = the density
300
What happens to the density of an ice cube when it melts? Explain why.
The density increases because the volume gets smaller.
300
Is a solid (a)compressible and (b) does it have a fixed shape?
a) No, a solid is not compressible b) Yes, a solid had a fixed shape.
300
Is each of the following changes a physical change or a chemical change? a) boil an egg b) burning matches
a) chemical b) chemical
400
State the Law of Conservation of Mass.
Mass cannot be created or destroyed, it can just be changed from one form to another, but the total amount will never change.
400
If you graph Mass Depends on Volume for two metals on one graph, how can you tell which material is more dense?
The material with the biggest slope has the greatest density.
400
What happens to the density of water when it freezes. Why?
The density decreases because the volume gets larger.
400
Is a liquid (a)compressible and (b) does it have a fixed shape? Is a gas (c)compressible and (d) does it have a fixed shape?
a) No, liquid not compressible b) No, liquid does not have a fixed shape. c) Yes, gas is compressible d) No, gas does not have a fixed shape.
400
If you do an experiment where (a) ice melts, (b) the water heats up, and then (c) the water turns into water vapor, during which phases is the temperature increasing? Why?
The temperature is increasing when b) the water heats up because the molecules are speeding up.
500
If you have a glass of water and drink half of it, have you broken the Law of Conversation of Mass? Explain why or why not.
No, the law is not broken because the water was not destroyed it just changed systems.
500
List 2 ways you found volume in the activities and the units that result in each.
Measure length, width and height and use formula V=L * W * H Units are cm cubed. Use a graduated cylinder and find volume by displacement.
500
Which of the following materials would float in water? Explain why. a) D = 1.2 g/mL b) D = 0.87 g/mL
b) D = 0.87 g/mL It is less dense than water.
500
What is the name of the phase when: a) a gas goes to a solid b) a solid goes to a gas?
a) Deposition b) Sublimination
500
If you do an experiment where (a) ice melts, (b) the water heats up, and then (c) the water turns into water vapor, during which phases is the temperature constant? Why?
Temperature is constant when (a) ice melts and (c) the water turns into water vapor because a phase change is happening.