Climate change!!!!!!!!!!!!
Wetlands are standing bodies of freshwater, just like lakes and ponds. however, wetlands are different from lakes and ponds because wetlands have <span>shallow water and emergent vegetation.
Hope this helps !
Photon</span>
Answer:
This is showing that the universe is growing and is possibly going to continue to grow or grow and collapse on itself creating a new universe.
Explanation:
Answer:
Latitude are the lines parallel with the equator, both above and below.
Longitude are the lines vertical from pole to pole, measured from the Prime meridian.
They are measuring lines used for locating places on the surface of the Earth. They are angular measurements, measured as degrees of a circle. A circle contains 360°. Each degree can be divided into 60 minutes, and each minute is divided into 60 seconds.
One degree of latitude equals 364,000 feet , one minute equals 6,068 feet, and one-second equals 101 feet.
One-degree of longitude equals 288,200 feet, one minute equals 4,800 feet, and one second equals 80 feet.
Answer:
B and C
Explanation:
B. In a given rock sample, the amount of Silicon-32 isotopes gets divided in half about every 170yrs.
This is the concept of half-life. Half life is the time take for half of a radioactive isotope to disintegrate. The shorter the half life the faster the isotope disintegrates.
From the question, we were told that it would take 170yrs for half of the isotope of Silicon to disintegrate to Phosphorus. This is the half life.
C. The half life can be used to determine the amount of Si-32 that has decayed from the time closure temperature was reached.
The closure temperature is very important in radioactivity. It is the temperature at which a system has cooled and there is no resulting disintegration of parent and daughter isotopes.
From first order kinetics, we know that the rate at which radioactive elements decay at any time is directly proportional to the number of radioactive atoms present. A knowledge of the half life helps to figure out the number of atoms that has decayed in time.
