Why do some igneous rocks have large crystals?
What will be an ideal response?
If the magma cools slowly, there will be large crystals
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Scientists have confirmed that the particles of Saturn's rings are not ____
a. held by Saturn's moons b. within the Roche limit c. chunks of ice d. ancient e. primordial
The four extra minutes in the solar day are due to our ________ around the Sun
Fill in the blank(s) with correct word
The place in a planet's orbit that is closest to the Sun is called:
A) vernal equinox. B) aphelion. C) perihelion. D) crossing the ecliptic. E) None of these; a planet's distance from the Sun never changes.
Your Local Sky
a. Where is the north (or south) celestial pole in your sky? b. Describe the meridian in your sky. c. Describe the celestial equator in your sky. d. What is the range of declinations that makes a star circumpolar in your sky? Explain. e. Describe the path of the Sun through your sky on the fall equinox. f. Describe the path of the Sun through your sky on the winter solstice.