Energy: Forms and Transfer — Answer Key
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
A burning candle only gives off light energy.
Corrected: A burning candle gives off both light energy and heat energy.
In Grade 4 Science, a candle releases two forms of energy at once: light you can see and heat you can feel.
2. Fix the sentence:
A book sitting on a high shelf has no energy at all.
Corrected: A book sitting on a high shelf has stored (potential) energy.
Grade 4 students learn that objects raised above the ground store gravitational potential energy that can become motion if they fall.
3. Fix the sentence:
Sound is not a form of energy because you cannot see it.
Corrected: Sound is a form of energy that travels as waves through the air.
In Grade 4 Science, sound energy is carried by vibrations and waves, even though our eyes cannot see them.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. Energy from moving objects is called kinetic energy.
Grade 4 students learn that any moving object, like a rolling ball, has kinetic energy.
2. Energy that is stored in an object because of its position is called potential energy.
In Grade 4 Science, potential energy is stored energy that can change into motion later.
3. The energy we feel from a hot stove is called thermal energy.
Grade 4 learners use thermal and heat to describe the same form of energy from warm objects.
4. The energy that flows through wires to power a lamp is called electrical energy.
In Grade 4 Science, electrical energy moves through wires as a current to run household devices.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Name three forms of energy you can find in your classroom and give one example of each.
Sample answer: Three forms of energy in a Grade 4 classroom are light energy from the ceiling lamps, sound energy from the teacher speaking, and electrical energy flowing through the cords that power the computer and clock.
Grade 4 students practice naming forms of energy by linking each form to a real example they can observe.
2. Why do scientists say a stretched rubber band has potential energy?
Sample answer: A stretched rubber band has potential energy because it is storing energy in its stretched shape. When you let go, that stored energy turns into motion energy and the band snaps back, showing the energy was waiting to be used.
Grade 4 Science teaches that objects under tension or lifted up store potential energy that can change form when released.