Answer:
The correct answer out of the four given options is
option a. light elements with atomic numbers less than 5
Explanation:
Big Bang nucleosynthesis, abbreviated as BBN, also known as primordial nucleosynthesis took place after the Big Bang for about 10 s to 20 minutes and resulted in the yield of isotopes of helium-4 (
), helium-3 (
) which accounts for most of the world's helium, other isotopes of hydrogen in small amounts like deuterium (D or
) and lithium isotope, lithium-7(
) in small amount.
Apart from these stable nuclei, it also yielded two radio-active isotopes: tritium(
) and beryllium-7(
) which due to their unstability later decayed into () and ().
All of these isotopes are of light elements with atomic number less than 5.
A because in the summer we are facing the sun directly and in the winter we are farthest away from the sun.
A dam can impact the water cycle by preventing the natural flow of water which disrupts the natural flooding process that occurs downstream which provides nutrients to the surrounding area. Also the water cycle is disrupted in regards to fish and the flow of species downstream because the dam impedes the flow of these species in their natural habitat.
Answer:
"Physical characteristics include the natural environment, such as landforms, elevation, water features, climate, soil, natural vegetation, and animal life." Specific example is a swamp with alligators, snakes, fishing shacks, cyprus trees, Spanish moss, brown pelicans, duckweed etc.
Explanation:
