(b) Magnesium and dilute hydrochloric acid react to produce magnesium chloride solution and hydrogen.
Mg(s) + 2 HCl(aq)
MgCl2(aq) + H2(g)
(i)
State two observations that could be made during the reaction.

The minerals found in bones are deposited by living cells called

How do temperature and salinity affect deepwater currents? as temperatures and salinity levels of water increase, the water rises to the surface where it creates currents as it moves to colder regions. they create changes in wind direction, moving denser water in the same direction as the wind and causing the deepwater circulation patterns found in the ocean. they equalize the forces on undersea currents caused by the coriolis effect as they replace more dense water with less dense water. they create density differences that cause dense deepwater currents to flow toward the equator where they displace less dense, warmer water above them.

Quickly what are the following of organisms that existed over a wide area but only for a limited time period called a.soft fossils b.mold fossils c.index fossils d.trace fossils