Miscellaneous
In which medium will a sound wave move more quickly?
a. air
b. rock
c. gas
d. vacuum (space)
rock
Moving water can be used to produce electricity because
most forms of energy can be converted into other forms.
A group of students want to cool down their cans of room temperature sodas quickly. So they put the cans of soda in the bottom of a cooler and pour ice and water over the top. Within 45 minutes, the students are happily drinking their cooled sodas. Which way did the energy move?
from the soda to the water
What property of the magnifying lens is most responsible for allowing it to magnify the penny?
It can refract light.
A dark, dull pavement that covers Katie’s driveway gets very hot in the daytime. Why does the pavement get hot?
It absorbs light.
Light travels fastest in ____________.
empty space (vacuum)
How is the gravitational potential energy stored in an object converted into kinetic energy?
by letting the object fall
Describes the flow of heat?
Heat flows from a warmer object to a cooler object
Sunlight is composed of energy that is visible to humans and energy that is not visible to humans. Which statement describes how the visible energy from the Sun is different from the nonvisible energy?
It has different wavelengths.
If light waves change speed when they pass from one medium into another, the light will be_______.
refracted
Name all of the non-renewable energy sources.
oil, coal, natural gas, nuclear
Chris placed two fresh batteries in a flashlight. Then, he switched on the flashlight and the bulb lit up. Which series of energy transformations took place?
chemical energy-->electrical energy-->light energy
A glass is filled with ice and a liquid beverage at room temperature. In which direction does heat flow in the system described? (hint: there are 4 steps)
air--> glass-->liquid-->ice
Jessica rides an escalator that moves her upward at a constant speed. As Jessica rises, how do her gravitational potential energy and kinetic energy change?
Gravitational potential energy increases and kinetic energy remains the same.
Jimmy has blue shoes, which of the following wavelengths are reflected by his shoes?
blue wavelengths
Which of the following are 2 ways to increase the potential energy of a bucket of water sitting on a bench?
a. decrease the amount of water and lower the bucket
b. increase the amount of water and lower the bucket
c. decrease the amount of water and raise the bucket up higher
d. increase the amount of water and raises the bucket up higher
increase the amount of water and raises the bucket up higher
Which of the following is true of every energy transformation?
a. Energy is destroyed. c. Energy is created.
b. Matter is formed. d. Energy is conserved.
energy is conserved
Hot water is poured into a mug and the mug gets hot. This is an example of which type of energy transfer?
Thermal energy
Which type of electromagnetic radiation has the longest wavelength and which has the shortest wavelength?
radio waves and gamma rays
In every energy transformation, some energy is always “lost” as ____ energy.
thermal
Hannah placed her left hand in a bowl of cold water and her right hand in a bowl of warm water. She waited a few minutes while her left hand cooled down and her right hand warmed up. Then she pulled her hands out of each bowl of water and folded them together. Which statement best describes how heat flows between her hands now?
Heat flows from her right hand to her left hand until they are both at the same temperature.
Which light waves compose white light?