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Level 17

Natural Science 5


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to vibrate
vibrar
sound wave
onda sonora
loud
fuerte
quiet
bajo o suave
vacuum
vacío
light source
fuente de luz
man-made
hecho por el hombre o artificial
Northern Lights
aurora boreal
straight lines
líneas rectas
ray
rayo
reflected
reflejado
refracted
refractado
to measure
medir
melting
derretirse