Explanation:
<h2>It's time to make a layout.</h2><h2>Insert a new map. ...</h2><h2>Choose an appropriate coordinate system. ...</h2><h2>Add the key map to your layout.</h2><h2>Size and scale it in the same way you did above for the main map. ...</h2><h2>Add the minimal possible data needed to explain to the map reader where in the world they are looking at.</h2><h2>Symbolize and label as needed.</h2>
Picture please ? So I can see how to answer this
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.
Answer:
B, C, and D
Explanation:
As the question says, a GPS finds exact locations. Exact locations have nothin to do with when something happened.
Answer:
The Moon, the Sun, and Earth form a straight line during the new Moon and full Moon.
Explanation:
When the earth, moon, and sun line up- which happens at times of full moon or new moon- the lunar and solar tides reinforce each other, leading to more extreme tides, called spring tides.
