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WorksheetsUnderstanding Molecule Behavior with Temperature Changes
Total questions: 14
Worksheet time: 10mins
In some places, hot water from underground can shoot up into the air through a hole in the ground. When this happens, the ground surrounding the water increases in temperature. What happens to the molecules in the ground when the temperature of the ground increases?
More heat molecules combine with the molecules in the ground.
The energy of the molecules in the ground decreases.
The energy of the molecules in the ground increases.
The cold energy of the molecules in the ground decreases.
How does the temperature of the outer layer compare with the temperature of the inner layer before the layers touch? What will happen after the layers have been touching for a while?
Before the layers touch, the outer layer is hotter than the inner layer. Once the layers are touching, the outer layer will transfer kinetic energy to the molecules in the cooler inner layer until both layers reach the same temperature, which will be in between their starting temperatures.
Before the layers touch, the outer layer is hotter than the inner layer. Once the layers are touching, the cooler inner layer will gain kinetic energy until the molecules of both layers have an energy of 90, because hotter things increase the temperature of cooler things.
Before the layers touch, the outer layer is cooler than the inner layer. Once the layers are touching, the inner layer will transfer kinetic energy to the molecules in the cooler outer layer until both layers reach the same temperature, which will be in between their starting temperatures.
Before the layers touch, the layers are different temperatures. Once the layers are touching, kinetic energy and cold energy will transfer between the molecules in the two layers until both layers reach the same temperature, which will be in between their starting temperatures.
After the gears have been touching for a while, which of the two bottom gears will be cooler, and why?
The smaller bottom gear will be cooler than the larger bottom gear, because less energy has to transfer for the molecules to reach the same temperature as the molecules of the top gear.
The larger bottom gear will be cooler than the smaller bottom gear, because the energy that transferred to it was spread out over more molecules.
The larger bottom gear will be cooler than the smaller bottom gear. It started with more total energy, so less energy had to transfer for both gears in Set B to reach the same total energy.
Both gears will be the same temperature, because both of the top gears had the same amount of energy to transfer and the molecules in the bottom gears start with the same energy.
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?
The molecules of the soup in the pot are moving and the molecules of the soup in the freezer are not moving.
The molecules of the soup in the pot are moving faster than the molecules of the soup in the freezer.
There is no difference because all of the soup is made of the same type of molecules.
The molecules of the soup in the freezer are smaller than the molecules of the soup in the pot.
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?
The energy of the molecules in the computer decreases.
The energy of the molecules in the computer increases.
The cold energy of the molecules in the computer increases.
The computer loses heat molecules.
Nistu is cooking rice in a pot. When she leaves the pot on the stove for a while, the temperature of the rice increases. What happens to the molecules of the rice when the temperature of the rice increases?
The energy of the molecules in the rice increases.
The cold energy of the molecules in the rice decreases.
The energy of the molecules in the rice decreases.
More heat molecules combine with the molecules in the rice.
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?
The energy of the molecules of the wax decreases.
The cold energy of the molecules of the wax increases.
The energy of the molecules of the wax increases.
The wax loses heat molecules.
After the laptops have been touching for a while, will Sam’s laptop or Odessa’s laptop be cooler, and why?
Sam’s laptop will be cooler than Odessa’s laptop, because less energy has to transfer for the molecules of Sam’s laptop to reach the same temperature as the molecules of Arun’s laptop.
Both laptops will be the same temperature, because both Arun’s and Mari’s laptops had the same amount of energy to transfer and the molecules in Sam’s and Odessa’s laptops started with the same energy.
Odessa’s laptop will be cooler than Sam’s laptop, because Odessa’s started with more total energy, so less energy has to transfer for her and Arun’s laptops to reach the same total energy.
Odessa’s laptop will be cooler than Sam’s laptop, because the energy that transferred to Odessa’s was spread out over more molecules.
What causes molecules to move more quickly?
energy
cold
food
water
What causes molecules to move more quickly?
heat
cold
food
water
Which claim is correct?
Claim 1: Molecules speed up when energy is created and slow down when energy is destroyed.
Claim 2: Molecules speed up when they get energy from other molecules and slow down when they give energy to other molecules.
What happens to the molecules in a metal spoon when it is placed in a cup of hot coffee?
The energy of the molecules in the spoon increases.
The energy of the molecules in the spoon decreases.
The spoon gains more molecules.
The molecules in the spoon stop moving.
When an ice cube melts in your hand, what is happening to the energy of the molecules in the ice cube?
The ice cube loses all its molecules.
The molecules in the ice cube disappear.
The energy of the molecules in the ice cube increases.
The energy of the molecules in the ice cube decreases.
