NJIT PHYS 203 Exam 4 UPDATED ACTUAL Questions and
CORRECT Answers
Atmoshpere Thin layer of gas held to the planet by gravity
What percent of the Earth's atmosphere is Nitrogen and 80% Nitrogen, 20% Oxygen
Oxygen?
How old is Earth? 4 1/2 billion years old
Primary Atmosphere Hydrogen and Helium; maintained in Sun, Earth, Saturn, Neptune and Jupiter
Secondary Atmosphere Outgassing; rained on molten planet to create oceans; life produced oxygen
Tertiary Atmosphere Current atmosphere
Barometer An instrument that measures atmospheric pressure
Where is atmospheric pressure highest? Sea level
Law of Atmosphere Equation 1 standard atmosphere of pressure (atm) = 101325 newtons/meter^2 aka a
pascal; 1.01325 bars; 760 mm Hg (Mercury)
1 bar of pressure equals 100,000 pascals
Why do scientists use mercury? It's 14-15x denser than water
Layers of Atmosphere troposphere (sea level), stratosphere, mesosphere, thermosphere
Tropopause end of troposphere
Stratopause the end of the stratosphere
Mesopause End of mesosphere
Cellular respiration Life gets energy from glucose which reacts with oxygen:
C6H12O6 + 6O2 => ENERGY + 6CO2 + 6H2O
Average temperature of planet Room temperature - 50 something degrees
Greenhouse Effect Water vapor and carbon dioxide absorb heat to keep planet warm
Anthropogenic global warming idea of human caused global warming; false
, Ionosphere Heat source in stratosphere
Ozonosphere Heat source in thermosphere
Atmosphere shields us from UV rays Near UV causes suntan, Far UV can kill us if it wasn't for our atmosphere
Hole in the ozone layer Naturally opens and closes
Eccentricity Deviation of a curve or orbit from circularity.
Eccentricity of Earth So small it's almost a perfect circle
Perihelion Orbit closest to the sun; Jan 3
Aphelion (AP-helion) Orbit furthest from sun; Jul 3
How far is Earth from the sun? 150 million km or 93 million miles
What causes the seasons? Tilt of the Earth
Obliquity Tilt of planet's rotational axis
Earth's obliquity 23 1/2 degrees
Summer in Northern Hemisphere Sun rays directly hitting North, missing South and causes Southern Hemisphere
to be in winter
Winter in Northern Hemisphere Sun rays missing North, directly hitting South and causes South to be in
summer
Summer Solstice June 21st, most amount of sun and day time in Northern Hemisphere; Tilted
most towards sun
Winter Solstice December 21st, least amount of sun, most night time in Northern Hemisphere;
Titled most away from the sun
Equinoxes Autumnal Equinox = September 21st
Vernal/Spring Equinox = March 21st
Equal day and night
Tilted neither towards or away from sun
Sun angle during summer solstice Highest in sky at noon; colatitude + obliquity
Sun angle during winter solstice Lowest in the sky at noon; colatitude - obliquity
Sun angle during equinoxes Mid sky at noon; equal to colatitude
Colatitude 90 - latitude
Where is colatitude the same as latitude? 45 degrees N
CORRECT Answers
Atmoshpere Thin layer of gas held to the planet by gravity
What percent of the Earth's atmosphere is Nitrogen and 80% Nitrogen, 20% Oxygen
Oxygen?
How old is Earth? 4 1/2 billion years old
Primary Atmosphere Hydrogen and Helium; maintained in Sun, Earth, Saturn, Neptune and Jupiter
Secondary Atmosphere Outgassing; rained on molten planet to create oceans; life produced oxygen
Tertiary Atmosphere Current atmosphere
Barometer An instrument that measures atmospheric pressure
Where is atmospheric pressure highest? Sea level
Law of Atmosphere Equation 1 standard atmosphere of pressure (atm) = 101325 newtons/meter^2 aka a
pascal; 1.01325 bars; 760 mm Hg (Mercury)
1 bar of pressure equals 100,000 pascals
Why do scientists use mercury? It's 14-15x denser than water
Layers of Atmosphere troposphere (sea level), stratosphere, mesosphere, thermosphere
Tropopause end of troposphere
Stratopause the end of the stratosphere
Mesopause End of mesosphere
Cellular respiration Life gets energy from glucose which reacts with oxygen:
C6H12O6 + 6O2 => ENERGY + 6CO2 + 6H2O
Average temperature of planet Room temperature - 50 something degrees
Greenhouse Effect Water vapor and carbon dioxide absorb heat to keep planet warm
Anthropogenic global warming idea of human caused global warming; false
, Ionosphere Heat source in stratosphere
Ozonosphere Heat source in thermosphere
Atmosphere shields us from UV rays Near UV causes suntan, Far UV can kill us if it wasn't for our atmosphere
Hole in the ozone layer Naturally opens and closes
Eccentricity Deviation of a curve or orbit from circularity.
Eccentricity of Earth So small it's almost a perfect circle
Perihelion Orbit closest to the sun; Jan 3
Aphelion (AP-helion) Orbit furthest from sun; Jul 3
How far is Earth from the sun? 150 million km or 93 million miles
What causes the seasons? Tilt of the Earth
Obliquity Tilt of planet's rotational axis
Earth's obliquity 23 1/2 degrees
Summer in Northern Hemisphere Sun rays directly hitting North, missing South and causes Southern Hemisphere
to be in winter
Winter in Northern Hemisphere Sun rays missing North, directly hitting South and causes South to be in
summer
Summer Solstice June 21st, most amount of sun and day time in Northern Hemisphere; Tilted
most towards sun
Winter Solstice December 21st, least amount of sun, most night time in Northern Hemisphere;
Titled most away from the sun
Equinoxes Autumnal Equinox = September 21st
Vernal/Spring Equinox = March 21st
Equal day and night
Tilted neither towards or away from sun
Sun angle during summer solstice Highest in sky at noon; colatitude + obliquity
Sun angle during winter solstice Lowest in the sky at noon; colatitude - obliquity
Sun angle during equinoxes Mid sky at noon; equal to colatitude
Colatitude 90 - latitude
Where is colatitude the same as latitude? 45 degrees N
