A) only stretch one side B) stetch both sides the same C) stretch one side tighter
A) about 18-20 billion years B) about 3.4 billion years C) about 4.5 billion years D) about 6000 years
A) Cosmic - origin of time, space, and matter. B) Chemical - the origin of higher elements from hydrogen. C) Micro - variations within kinds D) Macro - changing from one kind to another.
A) a mass the trillionth the diameter of a protron B) nothing C) a mass a few light years in diameter
A) increase B) loose
A) closer to the earth B) neither of these C) away from the earth
A) slowing down B) speeding up C) staying the same
A) yes B) no C) I don't know
A) neither B) saltier C) less saltier |