space Flashcards
weight
measurement of the effect of gravity on a given mass. with less gravity on the moon, you weigh less. with more gravity on earth, you weigh more.
tide
rise and fall of the sea level. Regular cycles of changing sea levels are caused by the gravitational pull of the sun and moon.
tidal range
difference in height between high and low tide
Bay of Fundy in eastern Canada
The most extreme tidal range in the world. Water is funneled from a wide bay into a narrowing river, causing dramatic sea level changes.
How Many high tides and low tides does a planet experience each day?
In one 24 hour period, two high tides and two low tides sweep across the planet
what effect does gravity have on ocean tides?
Every object with a mass exerts gravitational pull. The moon has mass, so so it’s gravity pulls on the earth’s oceans.
Why does the moon shine?
it reflects sunlight
what causes the moon to orbit around the earth?
the gravitational pull of earth on the moon. The changing relative positions of the moon, earth, and sun cause the phases of the moon eclipse and tides
the different forms the moon takes in its appearance from earth
phases
uses convex lenses to concentrate Light from a distance object
refracting telescopes
uses a concave mirror to see distance objects
reflecting telescope
telescope that collects radio waves and some microwaves using an antenna that looks like a TC satallite dish. used to detect objects in space, map the universe, and looks foe signs of life on other planets
radio telescope
the first optical space reflecting telescope that orbits earth
Hubble SpaceTelescope
use light to produce magnified images
optical telescope
helped launch objects into space by propelling itself by ejecting exhaust gas from one end.
rocket