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Medium A blocks more of a certain wavelength of radiation than medium B.  Medium A has a higher

Which of the following does not fall into the category of interplanetary debris?

Electromagnetic forces can be either attractive or repulsive.

The ________ planets are large bodies in the outer solar system with compositions like the Sun’s.

Today which of these theories seems to best explain the Moon’s origin?

A dense, hot body will give off a(n) _________ spectrum.

Some meteorites are believed to have come from Mercury.

When an electron moves from a low to higher energy state, a photon is __________.

The age of the solar system is determined with ________ dating.

Spring tides occur at new and full moons, when the Moon and Sun are aligned with the Earth.