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Vocabulary
What is Energy?
What is Sound Energy?
What is Light Energy?
Miscellaneous
100
What is energy?
Energy is the ability to do work or cause a change.
100
True or False: Energy can change an object's motion, color, shape, and temperature.
True
100
What is sound?
Sound is a wave of vibrations that spreads from its source. As sound waves travel through a material, such as air, the molecules in the material vibrate in a regular pattern.
100
The kind of light we see is called ________________.
Visible light.
100
Electrical energy can be changed into many forms. Consider a photo copier, explain the different energy changes.
The electrical energy is changed to light energy and mechanical energy. The photo copier also changes electrical energy into sound energy when it beeps.
200
What is vibration?
Vibration is the back and forth motion of an object.
200
Fill in the blank: Energy cannot be ________, or ___________, but it can change form and it can move from one object to another.
Energy cannot be made, or destroyed, but it can change form and it can move from one object to another.
200
What does sound need in order to exist?
Vibrating particles.
200
What is the result when all colors of visible light are mixed?
White light
200
What is magnetism?
Magnetism is a force that pushes and pulls on objects.
300
What is reflection and what is refraction?
Reflection happens when light bounces off an object, and refraction is the bending of light.
300
What is mechanical energy?
Mechanical energy is the sum of energy due to the motion of an object (kinetic energy) and the energy stored in the object due to the object's position (potential energy).
300
What is frequency?
Frequency is a measure of how often particles are vibrating. The greater the frequency, the higher the pitch of the sound.
300
Light is a combination of electrical and magnetic energy. What does light travel as?
Light is an electromagnetic wave, and can have short or very long wavelengths.
300
How does your ear help you hear a sound?
Sound waves vibrate through air particles. When the waves hit the eardrum, their energy is transferred. The brain interprets the vibration as sound.
400
Explain the difference between potential and kinetic energy?
Potential energy is energy that is not causing any changes now but could cause changes in the future. (It can also come in the form of elastic potential energy, or gravitational potential energy). Kinetic energy is the energy due to motion.
400
Which item has the greatest kinetic energy and why? A marble, or a soccer ball?
The soccer ball would have more kinetic energy because the more mass a moving object has, the more kinetic energy it has.
400
Fill in the blank. You hear sounds when waves of vibrations reach your ear. The areas where particles are very close together are called __________________.
Compressions
400
Things under a microscope often look like they have rainbow colors around. Why do you think this happens?
Microscopes have lenses that refract light. Refraction separates light into its colors.
400
What happens to a student's energy as he/she is about to go down a water slide?
The student's potential energy becomes kinetic energy.
500
Explain the difference between translucent, transparent, and opaque? Give an EXAMPLE of an item that is EACH of these things.
An object that is translucent let some light pass through, but not all. Objects that are transparent let nearly all light pass through them. Objects that are opaque do not let any light through. Examples will vary.
500
Which types of energy are involved in the sport of pole vaulting?
The types of energy involved in pole vaulting are gravitational and elastic potential energy. A pole vaulter has increasing gravitational potential energy as he/she reaches the top of his/her jump because this changes the pole vaulter's position relative to the Earth. Elastic potential energy comes from the compression, or bending of the pole vaulter's pole. As the pole bends, it gains more elastic potential energy.
500
Explain how sound energy and light energy are similar? How are they different?
Sound energy and light energy both travel in waves that have certain wavelengths. Sound energy vibrates particles while light energy is an electromagnetic wave.
500
What happens when you shine white light on an object?
If you shine white light on an object, some wavelengths bounce off the object and some are absorbed. The wavelengths that bounce off the object can enter your eyes, and they determine the color you see.
500
A plant uses sunlight to make nectar. A moth drinks the nectar and flies to the top of a tall tree. What energy changes have happened here?
Light energy from the sun became chemical energy in the nectar. This energy became kinetic energy in the wings of the moth so that it could fly.