Ascientist wants to use a model to present the results of his detailed scientific investigation

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

How have the greenhouse gasses increased from the year 2000 to 2018

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?