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Week 4 Vocabulary Crossword

Across
a starting place, where something comes from
lines of light that travel in a straight path from a bright object
an impressive and difficult achievement
clear, see-through so that light gets through
provides light; brightens; makes something clearer or easier to see or understand
energy carried over wires
an amount of energy that moves in a rippling pattern like a wave in water
something that is passed down
a supply of power
a window in a ceiling or roof that lets in the light
how long a wave is, the distance from the top of one wave to the top of the next wave
emptiness
Down
to cause light to appear on a surface
how fast or slow something moves
to grow strong and healthy
the work of designing and creating useful items
the invisible rays that carry energy in straight paths
tiny or very small bits of something
light that is made up of waves with different wavelengths and includes all the colors we can see
force or physical power; what living things need to exist and be active
an area of darkness created when light is blocked by something
not clear, blocking all light so that none gets through