<span> the main causes of ocean currents include variation in water density, gravity and wind friction</span>
Answer:
4- C or D; 5- A3
Explanation:
Animals that fly adapt to their lifestyle of soaring through the air, but sea creatures adapt to their gills because they need them to breathe oxygen in the water (one of these two). i hope this helps you tho.
Answer:
The dam,blocks off water from countine flow, and the result slows down the system
Explanation:
Atomic number of an atom equals to the number of nucleus in the nucleus of the atom. Therefore, the answer is 74.
The proton of an element is never changed. No matter if it's an atom or ion. It's like an ID number for an element. It defines the type of element. Don't mix up atomic number with mass number though, mass number is the total sum of of the number of protons and neutrons in an atom.
Theres one more subatomic particle in an atom, that is electrons. But since they're too light, they won't be counted in mass. Also, the number of electrons in an atom equals to the number of proton, also the atomic number. If the number of electrons is different, it's no longer an atom, but an ion.