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Energy Energy Energy!
REALLY HARD
100
Heat is transferred in moving liquids and gases by______.
What is convection?
100
A train and a car are moving at the same speed. Explain why they do not have the same kinetic energy.
The train has more mass than the car; therefore the train has more kinetic energy than the car.
100
When you turn on a radio, this type of energy transformation takes place.
What is electrical energy to sound energy.
100
Currents transfer heat in the ocean by _______.
What is convection.
100
Explain the direction that thermal energy naturally flows in.
What is thermal energy naturally flows from a warmer object to a cooler object until both objects are the same temperature.
200
Stored energy of an object due to its position is_____.
What is potential energy?
200
When a firecracker explodes, stored chemical energy turns into sound and light energy. What other type of energy is also released during this transformation?
What is thermal energy?
200
This type of energy is released when a proton is knocked out of an atom's nucleus.
What is nuclear energy.
200
What happens to most of the light rays that strike a convex lens?
What is they bend and focus to a point.
200
Which most likely has greater thermal energy, ice or water vapor?
What is water vapor.
300
_____is the transfer of heat from one part of an object to another.
What is conduction?
300
Describe what happens to the potential energy and the kinetic energy of a ball as it rolls down a hill from a position of rest at the top of the hill.
At the top of the hill, the ball will have the greatest amount of potential energy and the least amount of kinetic energy. As the ball rolls down the hill, its potential energy will transform to kinetic energy.
300
A sound with greater _____ has a ____ pitch.
What is frequency, higher.
300
Which food item has the least amount of energy: an apple with 90 calories or a hot dog with 145 calories?
What is an apple with 90 calories.
300
What is the relationship between the temperature of an object and the motion of its particles?
What is the relationship is that the higher the temperature the more the particles move, creating more heat.
400
_____ is the ability to do work or cause change.
What is energy?
400
Infrared waves have wavelengths that are longer than those of visible light. Compare the frequency and energy of infrared rays to the frequency and energy of visible light.
What is infrared waves have lower frequencies and energies than visible light waves because of the length of the wavelength. The longer the wavelength, the lower the frequency and energy.
400
Sound waves travel MOST slowly through a pool of freshwater or an area of dry air?
What is an area of dry air.
400
x-rays, microwaves, light, and radio waves are examples of____.
What is electromagnetic radiation.
400
True or False. The vibrations in materials are responsible for making different sounds.
What is True.
500
_____ is the total kinetic and potential energy of atoms in an object.
What is thermal energy?
500
Heat can transfer in many ways. Three ways that heat can transfer are:__________
What is conduction, convection, and radiation.
500
Particles move faster in hot chocolate or apple juice.
What is hot chocolate.
500
A student rolls these four items on the same surface and at the same speed. Which item will have the greatest kinetic energy. marble, beach ball, basketball, or table tennis ball.
What is basketball.
500
____ are a measure of loudness.
What are decibels.