Science - Grade 8 - QED - Free Printable

Let's solve the "Forms of Energy Quiz" step by step.

---

Part 1: Match the energy type with the correct definition

We are given 10 energy types (Mechanical, Radiant, Sound, Chemical, Electrical, Nuclear, Thermal, Energy, Potential, Kinetic) and 10 definitions labeled A–J. We need to match each energy type with its correct definition.

Let’s go through them:

#### 1. Mechanical
- Definition: D. Energy that matter has because of its motion or position. Either the matter has energy stored by its position or shape, or the matter is in motion.
- ✔ Mechanical energy includes both kinetic and potential energy.
- So, 1 → D

#### 2. Radiant
- Definition: E. Caused by the vibrations of electrically charged particles, also called electromagnetic or light energy, can travel through spaces that are absent matter.
- ✔ Radiant energy is light/EM waves (e.g., sunlight).
- So, 2 → E

#### 3. Sound
- Definition: B. Caused by an object's vibrations. Causes air particles to vibrate allowing energy to travel from particle to particle.
- ✔ Sound travels as vibrations through a medium.
- So, 3 → B

#### 4. Chemical
- Definition: F. Energy stored in a substance that can be released through a chemical change. {When the substance reacts}
- ✔ Chemical energy is stored in bonds between atoms.
- So, 4 → F

#### 5. Electrical
- Definition: G. Energy of moving electrons. Usually transformed into other forms of energy to help us do work.
- ✔ Electrical energy involves the flow of electrons.
- So, 5 → G

#### 6. Nuclear
- Definition: A. Energy that can be caused by changes in the nucleus of an atom, joining or splitting.
- ✔ Nuclear energy comes from fission/fusion in the nucleus.
- So, 6 → A

#### 7. Thermal
- Definition: C. Total energy of the particles that make up an object. Higher temperature, particles move faster.
- ✔ Thermal energy is the internal energy due to particle motion.
- So, 7 → C

#### 8. Energy
- This seems like a typo — probably meant to be “Electromagnetic” or just left blank? But it says "Energy" alone.
- Looking at the options, we already used most. But notice:
- The only definition not yet matched is I. The ability to do work.
- And Energy is defined as the ability to do work.
- So, 8 → I

> Note: This might be a trick question or mislabeling. But since "Energy" is listed as #8 and I is "The ability to do work", which is the general definition of energy, this makes sense.

#### 9. Potential
- Definition: J. The energy an object has because of its position or shape.
- ✔ Potential energy depends on position or configuration.
- So, 9 → J

#### 10. Kinetic
- Definition: H. Energy of motion.
- ✔ Kinetic energy is energy due to motion.
- So, 10 → H

---

✔ Part 1 Answers:

| Number | Energy Type | Letter |
|--------|------------------|--------|
| 1 | Mechanical | D |
| 2 | Radiant | E |
| 3 | Sound | B |
| 4 | Chemical | F |
| 5 | Electrical | G |
| 6 | Nuclear | A |
| 7 | Thermal | C |
| 8 | Energy | I |
| 9 | Potential | J |
| 10 | Kinetic | H |

---

Part 2: Categorize as Potential (A) or Kinetic (B)

Now classify the following energies as Potential (A) or Kinetic (B).

Remember:
- Potential Energy: Stored energy due to position, shape, or state.
- Kinetic Energy: Energy of motion.

Let’s analyze:

#### 11. Radiant
- Radiant energy = light energy, EM waves → these are waves in motion, so they have kinetic energy.
- But radiant energy is not stored; it's traveling.
- So, Radiant → B (Kinetic)

> Note: While radiant energy is often considered a form of energy transfer, it is associated with the motion of photons.

✔ 11 → B

#### 12. Sound
- Sound is caused by vibrating particles → motion of air molecules.
- So, sound energy is kinetic energy of vibrating particles.
✔ 12 → B

#### 13. Chemical
- Stored in chemical bonds → released during reactions.
- This is potential energy.
✔ 13 → A

#### 14. Electrical
- Involves movement of electrons → electrical current.
- Moving electrons → kinetic energy.
- However, electrical energy can include both potential (voltage difference) and kinetic (current).
- But in context, when we say "electrical energy", especially in circuits, it's often potential energy stored in electric fields (voltage), but the flow is kinetic.

But in standard science education:
- Electrical energy is typically categorized as potential energy because it's stored in electric fields (like charge separated by voltage).

Wait — let’s clarify:
- Electrical potential energy is stored due to position in an electric field.
- Electrical kinetic energy is the energy of moving charges.

But usually, electrical energy refers to potential energy in the context of energy forms.

For example, batteries store chemical energy, which becomes electrical potential energy.

So, Electrical → A (Potential)

✔ 14 → A

#### 15. Nuclear
- Stored in the nucleus, released via fission/fusion.
- It's potential energy stored in nuclear bonds.
✔ 15 → A

#### 16. Thermal
- Thermal energy = total kinetic energy of particles.
- Particles are moving → so it's kinetic energy.
- Even though it's "heat", it's due to motion.
✔ 16 → B

---

✔ Part 2 Answers:

| Number | Energy Type | Category |
|--------|---------------|----------|
| 11 | Radiant | B |
| 12 | Sound | B |
| 13 | Chemical | A |
| 14 | Electrical | A |
| 15 | Nuclear | A |
| 16 | Thermal | B |

---

✔ Final Answer Key:

#### Part 1: Matching
1. D
2. E
3. B
4. F
5. G
6. A
7. C
8. I
9. J
10. H

#### Part 2: Potential (A) or Kinetic (B)
11. B
12. B
13. A
14. A
15. A
16. B

---

🔍 Summary Explanation:

- Mechanical energy combines kinetic and potential.
- Radiant and Sound involve wave motion → kinetic.
- Chemical, Nuclear, and Electrical (as stored energy) are potential.
- Thermal is the sum of kinetic energy of particles → kinetic.
- Energy itself is defined as ability to do work → I.
- Potential energy is stored; Kinetic is motion-based.

Let me know if you'd like this formatted for printing or submission!