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WorksheetsUnit 6: Energy
Total questions: 21
Worksheet time: 14mins
Which point on this roller coaster would potential energy be the greatest?
A
B
C
D
Which point on this roller coaster would kinetic energy be the greatest?
A
B
C
D
Describe the energy transformation that occurs when a ball is thrown in the air.
Kinetic energy increases as potential energy increases; once at the top, potential energy decreases as kinetic energy decreases.
Kinetic energy increases as potential energy decreases; once at the top, potential energy increases as kinetic energy decreases.
Kinetic energy decreases as potential energy increases; once at the top, potential energy decreases as kinetic energy increases.
Potential energy and kinetic energy are both at 100%
What energy transformations would take place with a battery powered electrical circuit with a light?
electrical--> sound --> heat
chemical --> electrical--> light --> heat
electrical--> chemical--> nuclear
chemical --> sound --> heat
Friction always causes some of the energy in a system to transform into...
mechanical energy
potential energy
thermal energy
kinetic energy
Which of the following would be a good example of chemical energy transforming into electrical and sound energy?
windmill
camp fire
electric car
battery powered radio
What happens to the total energy in a system?
it stays the same as energy transformations take place
it decreases as energy transformations take place
it increases as energy transformations take place
energy is created and destroyed
What does the Law of Conservation of Energy state?
Energy can't be created or destroyed, but it does change form
Energy can be destroyed with friction
Energy can be created with inertia
Energy can't be created, but can be destroyed
When the PE is at 50% on the roller coaster, what will the KE be?
100
50
25
75
A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C. Calculate the specific heat capacity of iron.
4.18 j/gºC
2.17 j/gºC
2567 j/gºC
0.46 j/gºC
What happens on the flat lines of a heating curve?
increase in temperature
phase change (2 states of matter ex. solid to liquid)
decrease in temperature
decrease in energy
What happens to molecular motion as a substance's temperature increases and changes state?
molecular motion increases (KE increases) and particles spread apart
molecular motion is not affected by temperature
temperature increases but energy stays the same
molecular motion decreases and particles get closer together
The lower the specific heat...
the quicker the substance will heat up and cool down
the slower the substance will heat up and cool down
The higher the specific heat...
the better the substance is at insulating
the better the substance is at conducting heat
Conduction occurs more easily between solids and liquids. This is because the particles in gases are
farther apart and move faster
closer together and move faster
further apart and move more slowly
closer together and move more slowly
Which of the following would be an example of radiation heat transfer?
feet burning on hot pavement
boiling water on a stove
a person swimming in a pool
feeling heat from the sun through a window
Which of the following would be an example of conduction heat transfer?
feet burning on hot pavement
boiling water on a stove
a hot attic
feeling heat through a window
Which of the following would be an example of convection heat transfer?
feet burning on hot pavement
boiling water on a stove
swimming in cool water
feeling heat through a window
Why does metal feel cooler than a book?
the metal transfers heat to your hand
metal is a conductor, a book is an insulator
metal is an insulator, a book is a conductor
both objects easily transfer heat
You are given 10g samples of each of the materials listed. Each material is heated for the same period of time. Which one will have the least amount of change?
aluminum
copper
water
silver
platinum
You are given 10g samples of each of the materials listed. Each material is heated for the same period of time. Which one will have the most amount of change?
aluminum
copper
water
silver
platinum
