Answer:
90% of energy is lost as heat at each trophic level. Therefore, only 10% passes to the next level.
Explanation:
Answer:
The correct answer is B. Isotopes of an element differ in the number of neutrons.
Explanation:
Isotopes are atoms of the same chemical element, and therefore with the same number of protons, in which the number of neutrons in the atom core differs. According to current models, an atom consists of an atomic nucleus surrounded by a cloud of electrons. The core consists of a number of protons and a number of neutrons. The number of protons determines the atomic number of the element and also the chemical properties. The number of neutrons determines, among other things, the stability of the nucleus and, together with the number of protons, the atomic mass. Two atoms with the same number of protons but a different number of neutrons are called two isotopes of the same element.
Answer:
Delta
Explanation:
Deltas are the small triangular areas at the ends of rivers or streams when they flow into the ocean.
Answer:
The girl traveled 10 miles per hour
Explanation:
If the girl traveled 20 miles in 2 hours then she would have traveled 10 miles in one hour. you divide the amount of distance by the time
