A) stretch one side tighter B) only stretch one side C) stetch both sides the same
A) about 3.4 billion years B) about 6000 years C) about 4.5 billion years D) about 18-20 billion years
A) Micro - variations within kinds B) Cosmic - origin of time, space, and matter. C) Chemical - the origin of higher elements from hydrogen. 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) neither of these B) away from the earth C) closer to the earth
A) slowing down B) speeding up C) staying the same
A) yes B) I don't know C) no
A) neither B) saltier C) less saltier |