EDITED 1/8/16: A contour interval is a the elevation difference between two adjacent contour lines.
Previous person put some ridiculous answer. This one is the correct answer on APEX and does not need improvement.
blue shifted
They were formed in supernovae.
If a scientist makes an educated guess that diabetes is caused by genetic factors then his guess is an example of a hypothesis. He can then go and test his hypothesis.
what map that shows the layout of the roads in a city with no informatoin about elevation is called
Matter
Because ice cubes are less dense than water.
If you were testing how well different dish soaps cleaned the dishes the control group would be dishes washed in plain water.
A picture hanging on the wall has potential energy. If it comes loose, it will fall, converting the potential energy to kinetic energy.
yo
Matter was compressed into a single point and then exploded outward to form the universe - APEX
Distant stars give off less light