A student has science homework. The assignment is to find evidence to support the claim, "When an object experiences a change in kinetic energy, it transfers energy to another object or from another object."
The student decides to make noodles for a snack while thinking about his homework. He puts water in a pot on the stove and turns the heat all the way up. He waits for the water to boil so he can add his noodles. As he waits, the heat from the burner warms the pot. The water inside the pot warms as well. The hotter the water gets, the more it moves and the more steam is produced as water vapor leaves the pot. Heat energy from the burner is causing kinetic energy to build in the water. The student thinks about how he could use this in his homework and records these observations. The picture shows a drawing the student creates to show the motion of the water in the pot.
The drawing shows water in a pot with bubbles in the water and steam rising from the water.
The student then adds oil to a pan and turns up the heat. Next, he tosses in some popcorn kernels and heats them for several minutes. Once enough kinetic energy builds up within the kernels, they pop and move quickly. Some even bounce off each other and fly out of the pan. The student also records his observations of the popcorn popping. The picture shows a drawing the student creates to show the motion of the popcorn in the pan.
The drawing shows a pan with oil, popcorn kernels that have not popped, popcorn kernels that have popped, and three popcorn pieces flying out of the pan.
Multiple Select Question
Which two statements describe energy changes that occur in the passage?
A.
The kinetic energy in the corn increases as it is heated, which eventually causes the corn to pop.
B.
A chemical change occurs as the water is heated, causing the water to release energy to its surroundings.
C.
The kinetic energy in the water increases as it is heated, causing the water particles to move around faster.
D.
A chemical change occurs as the water is heated, causing the water to absorb energy from its surroundings.
E.
The kinetic energy in the corn decreases as it is heated, which eventually causes a chemical change to occur.
1 answer
The two statements that describe energy changes occurring in the passage are:
A. The kinetic energy in the corn increases as it is heated, which eventually causes the corn to pop.
C. The kinetic energy in the water increases as it is heated, causing the water particles to move around faster.
These statements correctly reflect the changes in kinetic energy as described in the scenarios involving boiling water and popping popcorn.
