Explanation:
we can protect soil quality by the following ways:
1.plantation should be done.
2.chemicals should not be used.
3.using earthworm in the field as it makes the soil fertile
4.construction of dams should be made which prevents soil erosion.
hope u get it!
Although beautiful Noctilucent clouds are seen here, very little is known about this coldest part of our atmosphere known as the __________________________.
Group of answer choices
Mesosphere
Troposphere
Thermosphere
Stratosphere
Answer: Mesosphere
Explanation: An unusual phenomenon of clouds that shine at night, called noctilucent clouds, occurs in the atmosphere.
In which atmospheric layer does this phenomenon happen?
Scientists are closely monitoring caribou populations to examine the effect of global climate change on habitat. The maximum population size for a herd of caribou based on the amount of habitat was 500,000 . A herd of caribou currently has a population size of 198,000 caribou as a result of habitat loss. Which of the following methods should be used to determine the percent change between the maximum population and the current population for this herd of caribou?
a. (500,000 caribou + 198,000 caribou)/198,000 caribou x 100
b. (500,000 caribou - 198,000 caribou) /100
c. (198,000 caribou - 500,000 caribou)/500,000 caribou x 100
d. 198,000 caribou/500,000 caribou x 1,000
Answer:
c. (198,000 caribou - 500,000 caribou) / 500,000 caribou * 100
Explanation:
Scientists want to determine the percentage change between maximum population and current population of Caribou. The maximum population herd size is subtracted from the current population size. Then the maximum population size is divided by the numerator. Percentage is calculated by multiplying it with 100.
(198,000 caribou - 500,000 caribou) / 500,000 caribou * 100
= 60.4%