facts good to memorize (earth & space)

might be useful for MC questions

what causes day and night?

earth’s rotation

what causes the seasons?

Earth's axial tilt as it revolves around the Sun

what causes ocean tides?

mainly the moon’s gravitational pull

which planet is the hottest

venus

which planet is the largest?

jupiter

which planet is closest to the sun?

mercury

what is the most abundant gas in Earth’s atmosphere?

nitrogen, about 78%

what is the second most abundant atmospheric gas?

oxygen, about 21%

which atmospheric layer contains most weather?

troposphere

which layer contains most of the ozone?

stratosphere

which type of rock commonly contains fossils?

sedimentary

what instrument measures air pressure?

barometer

what instrument records earthquakes?

seismograph

which seismic waves travel fastest?

p-waves

which stars have hotter surfaces, blue or red?

blue

is a light-year a measure of time or distance?

distance

what is the primary energy source of the sun?

nuclear fusion

what causes a solar eclipse?

the moon blocking the sun from Earth’s view