An ionized gas is called a plasma
a. True
b. False
Indicate whether the statement is true or false
True
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Which of the following is not a characteristic of the outer planets?
A) They all have rings. B) They all have large quantities of gas. C) They have very few, if any, satellites. D) They are primarily made of hydrogen and helium. E) Their orbits are separated by relatively large distances.
Water can be turned to ice by
A) lowering the surrounding air pressure. B) extracting energy. C) both of these D) neither of these
What is Earth's distance from the Sun?
a. 0.39 AU b. 0.72 AU c. 1.0 AU d. 1.5 AU e. 2.8 AU
When observing a very distant quasar, we are actually seeing the universe the way it was when it was much younger than it is today
Indicate whether the statement is true or false