Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Ch9&10studyquestions

8th grade science

QuestionAnswer
What are 3 examples of chemical to thermal energy conversions? digestion, camp stove, and a bike
In every conversion some energy is converted to _________ energy. This is why ____________________ machines can't exist. thermal; perpetual motion
A moving object has _________ energy. kinetic
What are three examples of fossil fuels? coal, natural gas, and petroleum
To find kinetic energy first you need to know ________ and ______________. mass; velocity(speed)
Thermal energy is........ total kinetic energy
Sound energy is......... vibrations of matter
Light energy is............ electrically charged particles
Electrical energy is......... moving electrons
Work and energy are both expressed in what unit? Joules
What's the formula for gravitational energy? What unit is used for the answer? GPE=mgh(Weight x Height); joules
Efficiency of light bulb compares____________________ going into a bulb and ___________________ coming out of a bulb. electrical energy; light energy
What is most important energy source? the sun
What's the formula for mechanical energy? Kinetic + Potential (Motion + Position)
In your body __________ energy from food provides ____________ energy to keep your body temperature constant. chemical; thermal
What is the energy provided by food is measured in ___________. calories
Material that warm up and cool off rapidly have a High/Low specific heat capacity. Low
A tile floor feels cold because energy is conducted from________ to ________. foot; floor
The official SI temperature scale is _________. Kelvin
Alcohol in a thermometer rises because of ____________ ____________. thermal expansion
Thermal energy is increased with mass. True/False True
Adding ice to drinks in a cooler will ________ the drinks kinetic energy, transfer heat from ________ to ______, and allow the drinks and ice to reach __________ _________________. lower; drinks; ice; thermal equilibrium
The handle on hot spoon heats up due to _____________. conduction
Greenhouses receive heat due to ____________. raditation
A change of state is a _____________ change. physical
Why does steam cause a more sever burn than hot water? Steam has more energy than hot water.
What's difference between energy conversion and the law of conservation of energy? Energy conversion- a change from one form to another, Law of conservation of energy- energy can't be created or destroyed.
How is temperature related to kinetic energy? Temperature- average kinetic energy, positive relationship.
Created by: Lilla721
Popular Physical Science sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards