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