Stuart is studying weather data for his region. The data was gathered from 1950 to 2016. Which observation would provide the STR
ONGEST evidence that the climate of his region has changed during this time? A. Average annual rainfall for 1985-2016 increased by 20 percent compared to the previous 30 years.
B. Total rainfall in 2014 was 30 percent greater compared to 1950.
C. The lowest recorded temperature occurred in 1954.
D. The highest recorded temperature occurred in 2016.
The climate of a region is determined through the observation of weather patterns over a long time- usually at least 15 years- in a region. Studying climate change would therefore also take very long time as meteorologists attempt to perceive changes in these weather patterns. In this case 30 years can be enough to notice a significant increase in rainfall patterns which can be classified as climate change.
false Isotopes. An isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.
An organism in which the two copies of the gene are identical — that is, have the same allele — is called homozygous for that gene. An organism which has two different alleles of the gene is called heterozygous.
The half life of a substance is the time required by that substance to reduce to half of its initial value. The half life is calculated using the formula:
Given that t = 87 years, half life = 29 years, therefore the quantity of strontium-90 left is:
That is one-eight of Strontium 90 would be left after 87 years