300 BC by Greek philosophers
D) El Nino because EL Nina is the cooling of the water.Photosynthesis is to do with plants and Tsunami is a storm
Answer:
C.
Explanation:
Absolute dating is defined as the method used to determine the age of biotic or abiotic things on a specified chronology in geology and archaeology.
Layers of the soil are used to determine the age of a geologic event is not a form of absolute dating because the deepest river deposits in the specific basin is used to determine the geological event.
So, the deposits of soil are used to tell the the age of a geologic event and not the layers of soil.
Hence, the correct option is C.
Answer:
14amu
Explanation:
Given subatomic particles:
Number of protons = 7
Number of Neutrons = 7
Number of electrons = 7
Unknown:
Atomic mass unit; amu of nitrogen
Solution:
The atomic mass unit of a substance is the number of protons and neutrons in such an atom;
Atomic mass unit = number of protons + number of neutrons
This is because the mass of an atom is concentrated in the nucleus;
For the given specie;
Atomic mass unit = 7 + 7 = 14amu
