incoming solar radiation
to incline or bend from a vertical position
instrument that proved that the earth rotates
The way Earth's rotation makes winds in the Northern Hemisphere curve to the right and winds in the Southern Hemisphere curve to the left.
motion of the earth
Rate of rotation
measured in DEGREES per unit of time (15 degrees/hour)
an imaginary line around the Earth parallel to the equator
Distance east or west of the prime meridian, measured in degrees; also called meridian
the star that is always directly above the north pole
the act of rotating as if on an axis
the orbiting of one heavenly body around another.
a configuration of stars as seen from the earth
the (usually elliptical) path described by one celestial body in its revolution about another
Time of day when sun is highest in sky
Ray coming in at a 90 degree angle
the amount of energy in a light or sound wave, which we perceive as brightness or loudness, as determined by the wave's amplitude
Angle of incidence
The angle at which a ray of light hits a mirror.
State of matter
(chemistry) the three traditional states of matter are solids (fixed shape and volume) and liquids (fixed volume and shaped by the container) and gases (filling the container)
the heat required to raise the temperature of one gram of a substance one degree centigrade
a change from one state (solid or liquid or gas) to another without a change in chemical composition
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.