Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/30

Click to flip

30 Cards in this Set

  • Front
  • Back
_______ power is the most common form of renewable energy.
water
About _% of the energy needs of the U.S. is hydroelectric energy.
4%
___________ are holding areas for water to control the flow of the water.
reservoirs
___________ energy is produced as water flows from reservoirs and turn turbines.
hydroelectric
The benefits of hydroelectricity:
1) 2) 3)
1)great renewable resource
2)often used a recreation lakes
3)can be used as irrigation
The disadvantages of hydroelectricity:
1) 2) 3)
1)large areas of land must be flooded
2)needs a large lake
3)can impact people downstream
______ energy uses heat from the earth to produce steam that is turned into electricity.
geothermal energy
Benefits of geothermal energy:
1) 2)
1)inexpensive to build
2)no pollution produced
The disadvantages of geothermal energy:
1) 2)
1)steam can be polluted
2)only certain places have magma close to the earth's surface
_________ ________ first appeared in the 1960s.
wind farm
_____________ energy uses air movement to produce electrical energy.
wind
Benefits of wind energy:
1) 2)
1)do not cause pollution
2)very little maintenance
Disadvantages of wind energy:
1) 2)
1)must have place with a lot of wind
2)energy cannot be stored
__________ energy uses the Sun's energy.
solar energy
Benefit of solar energy:
1)
1) no pollution
Disadvantages of solar energy:
1) 2) 3)
1)expensive to build
2)large area of land needed
3) energy has to be stored
________ is a solid substance found naturally in the earth.
mineral
Common minerals are:
1 2 3 4
iron, salt, gold, diamonds
A concentrated area of a specific mineral is called a ___.
vein
Veins of minerals are often found near ______.
volcanic areas
_______ is material with usable amounts of metal in them.
ore
________ is the process of separating metal from ore.
smelting
When smelting ore, the nonmetal part is called _____.
dross
_______ is a soft, shapeable metal considered very valuable.
gold
___________ means to be shapeable
malleable
________ is a malleable metal that is easy to scratch and tarnishes (turns black).
silver
_______ is necessary to make photographic film.
silver
________used for money, wiring and plumbing.
copper
_______ is a strong metal used to make tools.
iron
________ is a metal that is lightweight and strong.
aluminum