We know that orbital changes causes changes in ice cover because they occur simultaneously
What will be an ideal response?
Research has shown that this is the case over broad swaths of Earth's history.
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In order to determine the mass of a planet by applying Newton's laws of motion and gravity, the planet must have:
A) rings. B) moons. C) a solid surface. D) a known size and distance from Earth. E) planets further from the Sun than itself.
Astronomers use the _______________ alphabet to identify the bright stars in a constellation in approximate order of brightness
Fill in the blank(s) with correct word
The fact that a force is exerted on a current-carrying wire when in a magnetic field is employed in _______.
A. motors B. electric meters C. both of these D. neither of these
The primary mirror in an astronomical telescope must be a
a. half-silvered mirror b. convex mirror c. concave mirror d. plane mirror.