Changes in color and temperature indicate that a reaction has taken place.

Which statement accurately describes the relationship between air pressure, air density, or altitude? as altitude increases, pressure increases.as altitude increases, air density increases.air pressure and density are lowest at sea level.denser air exerts more pressure than less dense air.

An electrons position cannot be known precisely only it's probability of being in a certain location can be known

What was bohr’s contribution to the planetary model