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