Very few fossil of jelly fish or their close relatives have been found. This makes it hard to trace the evolutionary history of jellyfish using fossil record. what explain this

How many different states of matter exist?

What does the drop in barometric pressure from 1003 millibars to 926 millibars tell you about a hurricane?

A solution has a pH of 7. Is it considered a (n) A) acid B) base C) neutral substance

Which prediction about a methane molecule would most likely be made by using both the quantum model of the atom and John Dalton's model? A. when the molecule reacts new atoms are created B. the molecule contains different kinds atoms C.

A balanced chemical reaction is shown below. C5H12 + 8O2 ‹ 5CO2 + 6H2O If 3 moles of C5H12 are reacted completely, how many moles of wafer are formed?

Bradley hit a baseball with a bat. The baseball then hit a window and caused the window to break. Where did the energy that broke the window come from?

An observation which requieres measuresment is called

In the equation Mg (s) + O2 (g) → MgO (s) what is the reactant?

What ancient languages were used to develop the names of some elements?

What determines the color of the egg shell?