Answer:
Lower the emission of carbondioxide gas and planting more trees.
Explanation:
Lower the emission of carbondioxide gas and planting more trees are the two measures that have been implemented at the national level of countries to ensure the sustainability of coral reefs. Carbondioxide emission is the main reason for the destruction of coral reefs because more carbondioxide emission causes decrease the pH level of ocean. This acidic water of ocean damaged the skeleton of coral reefs and as a result thousands of organisms lost their habitat.
Answer:
Options (B)
Explanation:
New Zealand is an island country, located adjacent to the great pacific ocean. Whereas, the country of Australia is located towards the north-western side of New Zealand, at a distance of about 2500 miles.
The capital of Australia is Canberra, and the capital of New Zealand is Wellington.
Most of the interior Australia is comprised of desert where there occurs little or no rainfall, whereas there occurs large mountains at the central portion of New Zealand and is mainly due to the presence of active plate margin.
There are about 600 large islands in New Zealand, and majority of its population lives in Aukland, which is located in the extreme northern side of the country.
Thus, the correct statement is option (B).
H=88 G=92 K=91 M=89
How you solve this is G is the same thing as 92 because it crosses each other same thing with K. Then after that you just subtract 180 by 92 to get H because the line angle equals to 180 same thing with M
Answer:
By using seismic waves and seeing where they are reflected off of a fault a geologist can map.
did that help?
Explanation:
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.
