Environment
What percent of earth's water is salt water?
98%
Kidney
Name the SI unit for mass?
Kilograms
Which state of matter has a definite volume but not shape?
Liquid
In the early 1980's scientists discovered that chlorofluorocarbons - commonly found in refrigerants- turned into chlorine atoms when reacted with UV light in the stratosphere. These chlorine atoms would catalyze the destruction of the ozone which protected organisms from DNA damage caused by UV radiation. Where on Earth is the ozone hole found?
Antartica
Name the two arteries running along the sides of the neck:
carotid arteries
Which word defines the resistance against work?
Friction
Flourine
which gas is the most abundant in our atmosphere? At what percent?
78% nitrogen
What two types of matter does the brain consist of?
Grey and white matter
an absence of matter is called a...
vacuum
One mole of a substance is equal to 6.022*10^23 atoms in 12 g of what element?
Carbon-12
According to NASA, the global temperature rose about 4-7 degrees over a span of 5,000 years during the last ice age. In the last century, the temperature has increased by 0.7 degrees Celsius, roughly 10 times faster than post ice age warming. This is because greenhouse gases absorb reflected heat radiated from the sun, creating an insulated blanket around Earth's Surface. Name the three major greenhouse gases?
Carbon dioxide, methane, nitrous oxide
neurotransmitter
Name Newton's three laws of motion
1) Inertia - an object's motion remains unchanged unless a force acts on it
2) F = ma
3) For every force, there is an equal and opposite force
Who is credited with the invention of the modern periodic table?
Dmitri Mendeleev
Runoff containing nitrogen and phosphorous fertilizer enter water bodies causing excess algae growth. This blocks sunlight from reaching bottom-dwelling organisms which eventually decompose producing large amounts of CO2 that offset PH balance. Eventually, the water body turns into a bog-like meadow. What is this process called?
Eutrophication
Small pox
Does the pressure in the lungs increase, decrease or remain unchanged during inhalation? What gas law does this abide by?
decreases, Boyle's Law
Name three pH indicators
Phenolphthalein, methyl red, bromothymol blue