Answer:
A.
The moon's gravitational pull on Earth causes water to bulge on two sides of the Earth.
The correct option is C.
The density of an object refers to its mass per volume. Water and ice have different densities. The differences in their densities is due to the empty spaces which exist in the structure of ice. Because of the empty spaces, the structure of ice occupy more volume than that of water, hence it is less dense than water.
Answer: D and A
Explanation: just took the test
Potassium dihydrogen phosphate (KH2PO4) and sodium nitrate (NaNO2)
Molecular equation:
KH₂PO₄ (aq) + 3NaNO₂(aq) → Na₃PO₄(s) + KNO₂(aq) + 2HNO₂ (aq)
The net ionic equation is:
3Na⁺(aq) + PO₄⁻(aq) → Na₃PO₄(s)
The rest of the ions are spectator ions and tend to cancel out on both sides of the reaction.
<h3>a) Species change over time; some traits become more common, others less. This process of change is driven by natural selection. The traits that become more common are the ones that are “adaptive” or “increase fitness” (that is, a creature's chances of living longer and producing more offspring).</h3>
hope it helps :-).
