# Energy And Waves Quiz Questions And Answers

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Learning science is marvelous! Try answering our fun " Energy And Waves Quiz Questions And Answers " and test your knowledge! Waves can transfer energy through a distance without moving matter the entire range. When understanding the relationship between energy and waves, you must know that the greater the energy, the larger the frequency and the shorter the wavelength. Take this energy and waves quiz on the 8th-grade level & get to understand just how much you understood about the topic. All the best!

• 1.

### What is the law of conservation of energy?

• A.

Energy can be created but not destroyed

• B.

Energy can change into matter

• C.

Energy cannot be created nor destroyed, but can change forms

• D.

B and C

C. Energy cannot be created nor destroyed, but can change forms
Explanation
The law of conservation of energy states that energy cannot be created nor destroyed, but it can change forms. This means that the total amount of energy in a closed system remains constant over time. Energy can be converted from one form to another, such as from potential energy to kinetic energy or from thermal energy to mechanical energy. This principle is fundamental to understanding and explaining various phenomena in physics and is a cornerstone of the field.

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• 2.

### What type of matter does sound travel through the best?

• A.

Solid

• B.

Liquid

• C.

Gas

A. Solid
Explanation
It is like stepping stones. Since the atoms are closer together it is easier to "walk"

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• 3.

### What type of wave is a sound wave?

• A.

Transverse

• B.

Longitudinal

B. Longitudinal
Explanation
A sound wave is a longitudinal wave. In a longitudinal wave, the particles of the medium vibrate parallel to the direction of wave propagation. In the case of sound, the particles of the medium (such as air molecules) vibrate back and forth in the same direction as the sound wave travels. This type of wave is different from a transverse wave, where the particles of the medium vibrate perpendicular to the direction of wave propagation.

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• 4.

• A.

Yes 2

• B.

Yes 5

• C.

Yes3

• D.

No 2

• E.

No 3

A. Yes 2
• 5.

### Which type of energy is the burning of lumber, and dung?

• A.

Hydroelectric

• B.

Geothermal

• C.

Fossil fuels

• D.

Biomass

D. Biomass
Explanation
The burning of lumber and dung is classified as biomass energy. Biomass refers to organic matter, such as plants or animal waste, that can be burned to produce heat or electricity. In this case, the lumber and dung are being burned to release energy in the form of heat. Biomass energy is considered renewable because it comes from organic materials that can be replenished, unlike fossil fuels which are finite resources.

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• 6.

### Illuminated objects reflect __________.

light
Explanation
Illuminated objects reflect light. When light falls on an object, it interacts with the surface of the object. The surface either absorbs the light, reflects it, or transmits it. In the case of illuminated objects, they reflect the light that falls on them, causing them to be visible to our eyes. This reflection of light allows us to see the object and perceive its color, shape, and texture.

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• 7.

### What ray has the smallest wavelength in the electromagnetic spectrum?

• A.

Infrared

• B.

Gamma Ray

• C.

B. Gamma Ray
Explanation
Gamma rays have the smallest wavelength in the electromagnetic spectrum. They have the highest frequency and carry the most energy among all the electromagnetic waves. Gamma rays are produced by radioactive atoms and nuclear reactions. They have various applications in medicine, industry, and research, such as cancer treatment and sterilization.

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• 8.

### What is refraction?

• A.

When things bunch up

• B.

When waves move at a different speeds due to traveling in different mediums

• C.

When light bends

• D.

B and c

D. B and c
Explanation
Refraction refers to the bending of light when it passes from one medium to another, which occurs due to the change in its speed. This phenomenon is responsible for various optical effects, such as the apparent bending of a straw in a glass of water. Therefore, option b and c, which state that refraction is when waves move at different speeds due to traveling in different mediums and when light bends, are both correct explanations of refraction.

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• 9.

### Which type of wave needs a medium?

• A.

Mechanical

• B.

Electromagnetic

A. Mechanical
Explanation
Mechanical waves require a medium to propagate because they rely on the vibration and movement of particles in a substance to transfer energy. Examples of mechanical waves include sound waves, water waves, and seismic waves. In contrast, electromagnetic waves do not require a medium and can travel through vacuum, such as light waves and radio waves.

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• 10.

### The higher the frequency the _________ the pitch

higher
bigger
Explanation
The higher the frequency of a sound wave, the higher the pitch. This is because pitch is determined by the frequency of the sound wave. A higher frequency means that the sound wave is vibrating at a faster rate, resulting in a higher pitch. The term "bigger" is not applicable in this context as it does not accurately describe the relationship between frequency and pitch.

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• 11.

### When the amplitude is higher the sound is...

• A.

Softer

• B.

Louder

• C.

Being transformed

• D.

A higher pitch

B. Louder
Explanation
When the amplitude of a sound wave is higher, it means that the wave has a greater height or intensity. This results in a louder sound because the increased amplitude causes more air particles to be displaced, creating a stronger and more intense sound wave. Therefore, the correct answer is "louder".

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• 12.

### An orange appears orange because...

• A.

Only the orange wave is being absorbed

• B.

Only the orange wave is being transmitted

• C.

All the colors are being absorbed except orange which is being reflected

• D.

Only the orange wave is being reflected

• E.

The orange wave is being absorbed while all the other colors are reflecting

C. All the colors are being absorbed except orange which is being reflected
Explanation
An orange appears orange because all the colors are being absorbed except orange which is being reflected. When white light hits an orange, the orange pigment absorbs all the colors of light except for orange. The orange wavelength of light is reflected off the surface of the orange, allowing our eyes to perceive it as the color orange.

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• 13.

### Are energy transformations ever 100% efficient?

• A.

Yes

• B.

No

A. Yes
Explanation
heat is released

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• Current Version
• Jul 29, 2023
Quiz Edited by
ProProfs Editorial Team
• Jan 25, 2009
Quiz Created by
Penguinluvr22888

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