Select the statement(s) that are accurate examples of convection. A cold spoon is put into hot coffee. The thermal energy from the coffee moves into the spoon.

The Sun's rays heat the ground. As air molecules touch the ground, they also get warm.

Air molecules that are heated from the ground rise into the atmosphere, while the air molecules that are high in the atmosphere are cool and sink toward the ground.

Ocean water that is warm rises to the surface and cools. The cool ocean water sinks down.

Magma that is closer to the Earth's core becomes hot and begins to rise. As it rises, it begins to cool down and starts to sink back down.

What are the similarities of physical and chemical change ?

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.