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Energy Unit Test
Sloop's Energy Unit test
| Question | Answer |
|---|---|
| What is Chemical energy? | Potential energy stored in the chemical bonds that hold chemical compounds together. |
| What is Kinetic Energy? | energy an object has due to its motion |
| When you hold hands with your girlfriend or boyfriend, which heat transfer method is taking place? | Conduction |
| When you heat up a substance, what typically happens to the volume of the substance? | It increases |
| What is potential energy? | energy an object has due to its position |
| The earth receives energy from the sun through which heat transfer method? | Radiation |
| What is Chemical energy? | Potential energy stored in the chemical bonds that hold chemical compounds together. |
| Conduction mainly occurs in which state of matter? | Solids |
| True or False. Radiation can occur through a vacuum. | True. We receive the sun’s radiation through space. |
| The heat transfer method that typical makes second story homes hotter on the 2nd floor and cooler on the 1st floor. | Convection |
| This heat transfer principle is demonstrated when rice is seen swirling around in a pot of water. | Convection |
| When you heat up a substance, what typically happens to the volume of the substance? | It increases |
| When you increase the heat energy in an object, does that increase or decrease the density? | Decreases the density (that’s why hot air and water rise) |
| Even though you don’t touch the eye of a stove, you can feel the heat due to this heat transfer method. | Radiation |
| Our clothes keep us warm or cool due to this heat transfer method. | Conduction |
| What is it called when heat is transferred through matter by a collision of atoms? | Conduction |
| As the mass of an object increases, how are the potential and kinetic energy affected? | Potential AND Kinetic Energy increase |
| Kinetic or Potential? – Energy in a battery | Potential (Chemical) |
| Kinetic or Potential? – Energy in food | Potential (Chemical) |
| Kinetic or Potential? – Rubber band flying across the room | Kinetic (Motion) |
| Kinetic or Potential? – Light from distant stars | Kinetic (Light waves) |
| Kinetic or Potential? – Electrical energy | Kinetic (electrons moving) |
| Kinetic or Potential? – Nuclear energy from the sun | Potential (Nuclear) |
| Kinetic or Potential? – Sound vibrations from a stereo | Kinetic (Sound waves) |
| What value does the “g” in the formula for Potential Energy (PE = m ∙ g ∙ h) stand for? | 9.8 m/s2 |
| Any time friction occurs, there is a loss of energy to the system in what type of energy? | Thermal energy |
| True or false. Whenever there is a nuclear explosion, some energy is destroyed. | False. Energy can not be created or destroyed. |
| The elastic energy in a rubber band is transferred into thermal energy and what 2 other forms when it is shot? | Sound and Motion |
| What type of energy occurs when electrons move through a substance? | Electrical |
| Direct or Indirect. What relationship exists between the mass of an object and its kinetic energy? | Direct |
| Direct or Indirect. What relationship exists between the gravity on a planet and potential energy? | Direct |
| What type of energy occurs when compounds are broken down? | Chemical |
| What type of energy is also called stored mechanical? | Elastic |
| What type of energy is caused by vibrating molecules so it cannot occur in a vacuum, like outer space? | Sound |
| On a roller coaster, where is the maximum potential energy found? | At the top of the highest hill |
| On a roller coaster, when is the kinetic energy zero? | Whenever the coaster is stopped |
| On a roller coaster, when are the kinetic energy increasing and the potential energy decreasing? | Going down any hill or finishing a loop |
| What is the kinetic energy of a 10 kg bowling ball rolling at a speed of 5 m/s? KE = ½ m∙v2 | KE = ½ 10∙(5)2 = 125 J |
| What is the kinetic energy of a 100 kg man rolling down a hill at a velocity of 3 m/s? KE = ½ m∙v2 | KE = ½ 100∙(3)2 = 450 J |
| What is the kinetic energy of a 0.06 kg potato being shot from a potato gun at a speed of 10 m/s? KE = ½ m∙v2 | KE = ½ 0.06∙(10)2 = 6 J |
| What is the potential energy of a 15 kg dog on top of a 5 meter high roof? PE = m∙g∙h, where g = 9.8 m/s2 | PE = m∙g∙h= 15∙5∙9.8 = 735 J |
| What are the appropriate units for ENERGY? | Joules |
| What is the ability to do work called? | Energy |
| What is the approximate PE of a 100 kg man on top of a 5 meter high dive? PE = m∙g∙h, where g = 9.8 m/s2 | PE = m∙g∙h= 100∙5∙10 = 5000 J |
| Which has more potential energy – a 20kg goat on a 2m high car or a 0.04kg hamster on a 2000m skyscraper? | Goat = 400J and Hamster = 800J |
| In a light bulb, what 2 types of energy is the electrical energy converted into? | Thermal and Light |
| In an alarm clock, what 3 types of energy is the electrical energy converted into? | Sound, Light, and Thermal |
| In a wind-up toy, what type of energy do you start with and what 2 types do you end up with? | Start with Elastic and End with Sound and Motion |
| When you wind up a toy, are you increasing its potential or kinetic energy? | Potential |
| What is mechanical energy? | Energy associated with the position AND motion of an object |
| Kinetic energy depends on what? | SPEED and MASS |
| What is sound energy? | energy of particles bouncing off of each other |
| What is Thermal Energy? | total energy of the particles in an object |
Created by:
msloop
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