Irregulars typically have very few blue stars
Indicate whether the statement is true or false
FALSE
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In all interactions __________ number is conserved
Fill in the blank(s) with correct word
In science, words always
a. have the same meaning as common English words. b. mean very vague things, so scientists can hide their ignorance. c. have no reason for being; they must just be memorized. d. are used faddishly by scientists and the public. e. have specific meanings shared worldwide by all scientists.
When light passes from a material with a low index of refraction into material with a high index of refraction:
a. some light is reflected with a 180° change of phase. b. none of the light is reflected. c. some light is reflected without a change of phase. d. the light that is not reflected has a 180° change of phase.
The Sun is gradually increasing in luminosity as it ages. It is 20% more luminous than it was when it was born. Why isn't this considered to be an explanation for global warming?
A) The scientists are covering up this potentially valid explanation. B) The amount of energy the Earth receives from the Sun remains constant regardless of what the Sun does. C) The Sun is increasing in luminosity much too slowly, over many millions of years. D) What the Sun was doing millions of years ago is what determines Earth's temperature, since the Earth doesn't respond directly to what the Sun is doing today.