AS Flashcards
an area in the sky containing a group of stars in a pattern is called
constellation
a notable grouping of stars that do not contain a constellation
asterism
how long does it take our sun to revolve around the celestial sphere
365.25 days
when 3/4 of the moon’s lit surface faces the earth, and the lit part is shrinking, we say it’s a ___ moon
waning gibbous
who said “a great central fire controlled all motion in the universe”
pythagoras
claudius ptolemy proposed what idea that explained planetary retrograde motion
epicycles
Johannes Kepler created 3 laws concerning interplanetary motion. which one of the laws below is NOT one of Kepler’s
a. each planet’s path around the sun is an ellipse, with the sun at one focus of the ellipse
b. a planet speeds up when it is closer to the sun, and slows down when it is farther away
c. if you know how long a planet takes to orbit the sun, you can tell its average distance from the sun, vice versa
d. E=mc^2
d. E=mc^2
sir isaac newton created 3 universal laws of motion. which one of the laws below is NOT one of newton’s?
a. a body in motion tends to stay in motion, and a body at rest tends to stay at rest
b. the acceleration of an object is proportional to the force exerted on it
c. for every action there is an equal and opposite reaction
d. mass can neither be created nor destroyed
d. Mass can neither be created nor destroyed
shape of earth is most accurately described as
oblate spheroid
earth’s interior is made up mostly of
olivine
the earth consists of 3 layers, which of the following is NOT one of the layers
a. crust
b. magma
c. mantle
d. core
b. Magma
what percent of the atmosphere is nitrogen
78%
what percent of the atmosphere is oxygen
21%
what percent of the atmosphere are trace gases and mostly argon
1%
what layer of the atmosphere do we live, work, and play in
troposphere
the 2 times in a year where we have our longest and shortest days
summer and winter solstice
charged particles from the sun are captured by earth’s magnetic field, also known as what?
van allen belt
name for lighted moving “curtains” in our polar regions
aurora borealis
which “tide” occurs during full moons and new moons
spring tide