The sand on the beach cools down at night then the ocean is because the sand is on dry land.
Answer:
The correct answer to this is
e. all of the above
Explanation:
An hypothesis is a proposal to solve or answer a new or strange phenomenon that is not suitably explained by current scientific knowledge. The outcome of an hypothesis is not predetermined. An hypothesis can be termed a scientific hypothesis only when the statements of the hypothesis can be tested also known as the testability of the hypothesis. Hypothesis are normally focused on observations that are unexplained by current scientific theories
Answer : The correct option is, (2) Energy is absorbed as bonds are broken.
Explanation :
As we know that the bonds are formed and breaks during the chemical reaction. Some energy is released or absorbed when the bonds are formed and breaks during the chemical reaction.
During the bond breaking, some energy is required to break the bonds.
During the bond formation, some energy is released to the formation of the bonds.
In the given reaction, the bond between the hydrogen-hydrogen in 
are breaking into two hydrogen. That means during the bond breaking, some energy is required or absorbed to break the bonds.
Hence, the correct option is, (2) Energy is absorbed as bonds are broken.
Because their molecules are more tightly packed. Massdensity = ---------- Volume
So more densely packed molecules means more mass per unit volume. Hence metals are denser than non-metals.
