Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.
We do not share your email address with others. It is only used to allow you to reset your password. For details read 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.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
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

Unit 4 Vocab

Science vocab for section 4

renewable resource any material or energy source that cycles, or can be replaced easily within a short time period.
solar energy radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis.
biomass fuels organic materials produced in a renewable manner.
geothermal energy Geothermal energy is heat energy generated and stored in the Earth.
nonrenewable resources material or energy source that cannot be replaced easily or requires extremely long amounts of time to replace itself.
fossil fuels fuels such as natural gas, charcoal, peat, coal, and petroleum(oil) that release energy when burned
solar thermal system uses the sun's energy, rather than fossil fuels, to generate low-cost, environmentally friendly thermal energy.
photovoltaic system A photovoltaic system, also PV system or solar power system, is a power system designed to supply usable solar power by means of photovoltaics.
passive solar system the thermal mass (concrete, masonry, or water) is located directly behind the south-facing glass and in front of the heated indoor space and so there is no direct heating
conservation preservation, protection, or restoration of the natural environment, natural ecosystems, vegetation, and wildlife.
preservation the state of being preserved, especially to a specified degree.
Created by: 22rider.and