Heat/Temperature
Energy
Transformation
Properties of Matter
Bonus
100
What unit is the SI temperature scale?
Kelvin
100
What is energy?
The ability to do work; the ability to make something move.
100
Give an example of an energy transformation.
Example: Plugging in a space heater converts electrical energy into thermal energy.
100
What do all objects that take up space have?
Mass
100
What is the speed limit of the universe?
The speed of light, c, or 2.9 x 10^9 m/s
200
What is temperature a measure of?
Average Kinetic Energy, or the motion of the molecules
200
What is the difference between kinetic and potential energy?
Kinetic is activated, moving energy. Potential is stored energy.
200
When energy transforms, a little bit of energy is lost in the form of heat. What is the name of this phenomena?
Friction
200
What is all matter made up of?
Atoms, Mass
200
Why can't we hear the sun?
Sonic Energy requires a medium to travel through.
300
What are the three ways that heat transfers?
Radiation, Convection, and Conduction
300
What is the law of the conservation of energy?
Energy cannot be created, nor destroyed.
300
Heat, and energy, move in predictable ways. What is the rule that heat will always follow?
Heat will move from hot places to cold places.
300
Density cannot be directly measured. Density however is a result of what two properties?
Mass divided by volume.
300
What is air mostly made up of?
The particles are 72% Nitrogen, 24% Oxygen, a few other trace gases and water vapor, but mostly empty space.
400
What is absolute zero?
The temperature where molecules stop moving. (Approximately -232C, or -459F)
400
Which ball has the greatest potential energy?
The highest ball from the ground.
400
DAILY DOUBLE
When you apply kinetic energy to a ball on earth, it eventually stops moving. Where did the energy go?
Some of it turns into heat through friction with the ground and air, some of it turns into sound energy upon collision with other objects, some of the kinetic energy transfers into other objects when it touches them.
400
What is inertia?
An objects tendency to continue its current motion (or lack thereof) unless acted upon by an outside force.
400
Where is most of the mass of an atom?
99% of the mass of an atom is in its center, the atomic nuclei
500
Which type heat transfer requires no medium to pass through?
Radiation
500
What sort of energy do all objects produce?
Electromagnetic Energy
500
Why is it impossible to create a perpetual motion machine?
It would take infinite energy to power; the law of the conservation of energy prohibits
500
What happens to the inertia of an object as its mass increases?
The object's inertia also increases.
500
DAILY DOUBLE
What are the three laws of motion? (Newton's Laws)
- A body remains at rest, or in motion at a constant speed in a straight line, unless acted upon by a force.
- When a body is acted upon by a force, the time rate of change of its momentum equals the force.
- If two bodies exert forces on each other, these forces have the same magnitude but opposite directions.