Key Terms
Kinetic Energy
Gravitational Potential Energy
Heat and Thermal Energy
Random!
100
Explain the Law of Conservation of Energy
Energy cannot be lost or gained, but it can be transferred from one object/place to another, and transformed into different types of energy.
100
Kinetic energy depends on these two variables.
Mass and velocity
100
In the GPE formula, what units are used to measure mass?
kilograms
100
This is the flow of thermal energy from warmer objects to colder objects.
What is heat?
100
Friction often transforms kinetic energy into this form of energy.
What is thermal energy?
200
This is the ability to do work.
What is energy?
200
What is the KE of a 2kg ball being thrown at 10m/s?
100J
200
In the GPE formula, "g" stands for...
The acceleration due to gravity, which is 9.8 m/s^2 on Earth
200
This is the average kinetic energy of all the particles in a substance.
What is temperature?
200
What form of energy is created in the Sun?
Nuclear energy
300
This metric unit is used to measure the amount of energy.
What is the Joule (J)?
300
Find the mass of an object traveling at 50m/s with 10,000J of kinetic energy.
Mass = 8kg
300
Find the GPE of a 3-N textbook sitting on a desk 1.5m off the ground.
4.5J
300
This is the amount of energy required to raise the temperature of a certain amount of a substance by a certain number of degrees.
What is specific heat capacity?
300
What is thermal expansion?
Thermal expansion is when a material gets larger as it heats up. This happens because the particles within the substance vibrate faster as they heat up, and move apart from each other.
400
This is energy in motion.
What is kinetic energy?
400
Which variable affects the amount of kinetic energy in an object more? Explain your answer.
Velocity, because it is squared in the KE equation.
400
Find the GPE of a 20,000g bowling ball on top of EHS (12m high).
2,352J
400
As a team, come up with an example of conduction. Explain how your example shows conduction occurring.
???
400
The energy we get from food is this form of energy.
What is chemical energy?
500
This is energy stored due to work done against gravity.
What is gravitational potential energy?
500
Imagine that a car and truck are traveling down the road side by side. They are traveling at the same speed, but the truck has three times the mass of the car. If the KE of the truck is 9000J, what's the KE of the car?
3000J
500
Imagine that a boulder is sitting on the edge of a cliff 20m high. At this height, it has a GPE of 50J. How much GPE will it have when it falls to a ledge 8m below?
20J
500
As a team, come up with an example of convection. Explain how your example shows convection occurring.
???
500
When asked what causes the seasons on Earth, Tommy answers: "The seasons occur because sometimes the Earth is closer to the sun, and sometimes it's farther away. In the summer we're closer to the sun, and the sun transfers heat to the Earth through conduction. In the winter we're farther away from the sun, so no energy from the sun is transferred to Earth during the winter." Identify three incorrect statements from Tommy's answer.
1. In the summer we're closer to the sun. 2. The sun transfers heat to the Earth through conduction. 3. No energy from the sun is transferred to Earth during the winter.
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