TEMPERATURE
How does the air on a hot day compare with the air on a cold day?
a) On a hot day, air molecules have more energy
b) On a cold day, air molecules move faster
c) Heat is caused by the sun, and temperature is caused by conditions in the atmosphere.
a) On a hot day, air molecules have more energy
What happens when a cold drink sits in a hot room?
a). It remains cold
b). It gets warmer
c). It starts boiling
d). It starts freezing
b) It gets warmer
Gases tend to expand. What's the best synonym for "expand?"
a). Collide
b). Spread out
c). Shrink
d). Boil
b). Spread out
Energy always transfers from HOT things to COLD things
a) True
b) False
a) True
After a candle is blown out, the wax of the candle decreases in temperature. What happens to the molecules of the wax when the temperature of the wax decreases?
a) The temperature decreasing SLOWS DOWN the molecules
b) The temperature decreasing SPEEDS UP the molecules
a) The temperature decreasing slows down the molecules
What is the temperature in which Pasteurization of water occurs?
a) 100 degrees Celsius
b) 65 degrees Celsius
c) 246 degrees Celsius
d) 0 degrees Celsius
b) 65 degrees Celsius
Heat from the Sun reaches Earth through which type of heat transfer?
a). Conduction
b). Radiation
c). Convection
d). All the of the above
b). Radiation
What is the basic shape of a liquid?
a). A sphere
b). The same shape as a gas, only rounder
c). A cube
d). Whatever shape its container is
d). Whatever shape its container is
What happens to molecules when the temperature reaches absolute zero?
a). They move so fast that they can't be observed.
b). They begin to vibrate slowly.
c). All of their motion stops completely.
d). They form bonds with other, nearby molecules.
c). All of their motion stops completely.
What is equilibrium?
a) when an object's temperature is much higher than the temperature in the room
b) when you are standing in the middle of the room
c) a balanced state in which a system is stable, such as when two or more samples are at the same temperature
c) a balanced state in which a system is stable, such as when two or more samples are at the same temperature
What happens when you burn a piece of wood in a campfire?
a. Chemical energy is released
b. Nuclear energy is released
c. Energy is released due to friction
d. Solar energy is released
a. Chemical energy is released
Which of the following best describes a vacuum?
a). Hot
b). Cold
c). Shiny
d). Empty
d). Empty
What is matter? Choose the best answer.
a). Anything that is solid
b). Anything that takes up space
c). Anything that has a fixed volume
d). Anything that can be seen
b). Anything that takes up space
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 freezer are smaller than the molecules of the soup in the pot.
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.
b) The molecules of the soup in the pot are moving faster than the molecules of the soup in the freezer.
Lava is hot liquid rock. When lava flows over solid ground, the solid ground beneath it increases in temperature. What happens to the molecules in the solid ground when the temperature is increasing?
a) they start moving faster due to the increase in temperature and energy
b) molecules stay at the same speed
c) molecules slow down due to the lava becoming a solid
a) they start moving faster due to the increase in temperature and energy
Which of the following best describes temperature?
a). Number of molecules
b). Motion of molecules
c). Size of molecules
d). Type of molecules
b). Motion of molecules
When two things are the same temperature:
a). They have the same number of molecules
b). Their molecules stop moving
c). Their molecules move at the same average speed
c). Their molecules move at the same average speed
What will happen if you keep increasing the temperature of a liquid?
a). It will boil and become a gas
b). It will transpire
c). It will remain a liquid
d). It will solidify
a). It will boil and become a gas
Why is there more heat in an iceberg than in a pot of boiling water?
a. The pot insulates the heated molecules
b. Most icebergs are fairly warm to the touch
c. Icebergs contain many more molecules than pots of water
d. Water does not hold heat very well
c. Icebergs contain many more molecules than pots of water
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 computer loses heat molecules.
a) The energy of the molecules in the computer decreases.
What will happen if you heat a liquid to high temperatures?
a). It will become a colloid.
b). It will become a gas.
c). It will become a solid.
d). It will become a plasma.
b). It will become a gas.
When you heat a pot on a stove, the handle gets warm. Which type of heat transfer is responsible?
a. Conduction
b. Radiation
c. Convection
d. All of the above
d. All of the above
How can you remove energy from matter?
a). By increasing its volume
b). By lowering its temperature
c). By increasing its pressure
d). By boiling it
b). By lowering its temperature
How do molecules at warm temperatures differ from molecules at cool temperatures?
a). molecules move around more.
b). molecules grow in size.
c). molecules exchange electrons more easily.
d). molecules combine with each other more easily.
a). molecules move around more.
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) It is impossible to know without data on the number of molecules in each object.
b) Its energy decreases while the energy of the plate increases.