General Science Flashcards
The most accurate description of the earth’s atmosphere is that it is made up of
78% oxygen, 19% nitrogen, 2% carbon dioxide with trace amounts of nitrogen, water vapor, and dust particles
3% water vapor, 78% ozone, 20% nitrogen
20% oxygen, 77% hydrogen, 3% carbon dioxide, and some water vapor
21% oxygen, 78% nitrogen, .03% carbon dioxide, trace amounts of rare gases, water vapor, and some dust particles
77% oxygen, 21% hydrogen, and 2% carbon dioxide, with trace amounts of nitrogen, water vapor, and dust particles
21% oxygen, 78% nitrogen, .03% carbon dioxide, trace amounts of rare gases, water vapor, and some dust particles
A vibrating tuning fork, placed in a vacuum under a bell jar, will
have the pitch of its sound raised have the pitch of its sound lowered be inaudible crack the thick glass of the bell jar experience no change in its audible tone or pitch
be inaudible
The there ingredients found most often in commercial fertilizers are
iron, calcium, and magnesium nitrogen, phosphorus, and potassium sulfur, phosphorus, and iron magnesium, iron, and calcium iron, sulfur, and magnesium
nitrogen, phosphorus, and potassium
To which organism is the whale most closely related?
shark turtle brachyiosaurus horse sparrow
horse
What is the correct formula for “dry ice”?
HO2 CO2 H2O2 C2O H6O6C6
CO2
When an airplane is in flight, the air pressure on the bottom surface of the wing is
less than on the top surface
more than on the top surface
either more or less than the top surface, depending on the speed of the airplane
either more or less than the top surface, depending on the shape of the wing
the same, regardless of airspeed or altitude
more than on the top surface
In a vacuum, radio waves and visible light waves have the same
frequency speed intensity wavelength appearance
speed
Which structure in the human eye performs the same function as the film in a camera?
lens cornea retina optic nerve sclerotic membrane
retina
A cloned organism is
an individual organism grown from a single body cell of its parent
genetically identical to its parent
a result of stimulating the parent cell to reproduce by asexual means
all of the above
none of the above
all of the above
Parallel rays of light, after reflection from a plane (flat) mirror will be
converged parallel diffused absorbed invisible
parallel
Object 1, with a mass of 4 kilograms, and Object 2 with a mass of 10 kilograms, are dropped simultaneously from a resting position 500 meters high. Neglecting air resistance, what is the ration of the speed of Object 1 to the speed of Object 2 at the end of four seconds?
2: 5
1: 1
1: 4
1: 8
2: 1
1:1
Which of the following determines the sex of a human baby?
egg cell polar body sperm cell mitochondrion meiotic membrane
sperm cell
Isotopes of the same element have the same number of
electrons protons electrons and protons neutrons and protons electrons and neutrons
electrons and protons
Erosion and depletion are problems associated with
blood circulation baldness soil conservation cardiovascular exercise ozone hole maintenance
soil conservation
An insulator is a material with
man free electrons few free electrons few free protons many free ions a variable number of neutrons
few free electrons
