Vocab 1
1.Things are made of __________________________ (or other GROUPS OF ATOMS).
Molecules
6.The molecules of a system will transfer energy until the system reaches a stable state known as __________________________, in which all of the molecules are moving at about the same speed.
equilibrium
Lin cooked a pot of soup, then put half the soup in the freezer for a while. Now the soup in the pot is hot, and the soup in the freezer is cold. What is the difference between the molecules of the soup in the pot and the molecules of the soup in the freezer?
a.The molecules of the soup in the pot are moving and the molecules of the soup in the freezer are not moving.
b.The molecules of the soup in the pot are moving faster than the molecules of the soup in the freezer.
c. There is no difference because all of the soup is made of the same type of molecules.
d.The molecules of the soup in the freezer are smaller than the molecules of the soup in the pot.
B
Object 1 has 6 molecules and an average KE of 2.
Object 2 has 12 molecules and an average KE of 2.
Which object has a higher THERMAL ENERGY?
Object 2
Object 1 has 9 molecules with an average of 30 KE.
Object 2 has 9 molecules with an average of 70 KE.
What will the equillibrium KE be?
50
2.When a thing gets __________hotter/colder________________, its molecules are moving faster and have more kinetic energy.
hotter
7.For things at the same temperature, the thing with more molecules has more total _____________________________(other term for thermal energy) than the thing with fewer molecules.
total kinetic energy
9.Engineers design computers to cool down quickly so they do not break. What happens to the molecules in a computer when the temperature of the computer decreases?
a.The energy of the molecules in the computer decreases.
b.The energy of the molecules in the computer increases.
c. The cold energy of the molecules in the computer increases.
A
Object 1 has 6 molecules and an average of 6 KE.
Object 2 has 10 molecules and an average of 5 KE.
What direction will energy transfer?
Object 1 to object 2
There are 11 molecules, each with a different molecular speed. 10, 9, 7, 9, 10, 8, 10, 9, 8, 10, 9. Find the total KE / Thermal Energy
99
3.When a thing gets ________hotter/colder__________________, its molecules are moving slower and have less kinetic energy.
colder
the total kinetic energy of all the molecules that make up a sample
Thermal Energy
10.Joseph puts a piece of toast on a plate. The toast is hot from the toaster. When he puts the toast on the plate, the energy of the plate increases. What must be true of the energy of the toast?
a.Its energy stays the same while the energy of the plate increases.
b. Its energy decreases while the energy of the plate increases.
c. Its energy increases while the energy of the plate increases.
B
Object 1 has 6 molecules and an average of 6 KE.
Object 2 has 10 molecules and an average of 5 KE.
What object is hotter?
Object 1
There are 11 molecules, each with a different molecular speed. 10, 9, 7, 9, 10, 8, 10, 9, 8, 10, 9. Find the average KE / temperature.
9
4.__________________________ is a measure of the AVERAGE kinetic energy of the molecules of a thing.
Temperature
to make something safe to eat or drink by heating it
pasteurize
Object 1 has 6 molecules and an average KE of 2.
Object 2 has 12 molecules and an average KE of 2.
Which object has more matter?
Object 2
Object 1 has 9 molecules with an average of 30 KE.
Object 2 has 9 molecules with an average of 70 KE.
Which object has higher Thermal Energy?
Object 2
There are 7 molecules, each with a molecular speed of 6. Find the thermal energy.
42
Energy isn’t created or __________________________. Therefore, as energy transfers, it increases in one part of the system as it decreases in another part of the system. The total energy of a system doesn’t change.
Destroyed
to move from one object to another or one place to another
Transfer
Object 1 has 6 molecules and an average KE of 2.
Object 2 has 12 molecules and an average KE of 2.
Which object has a higher TEMPERATURE?
Neither, they are the same.
Object 1 has 6 molecules and an average of 6 KE.
Object 2 has 10 molecules and an average of 5 KE.
Which object has more Thermal Energy?
Object 2
There are 7 molecules, each with a molecular speed of 6. Find the average KE.
6