what is gravity

what is mass

what is weight

name all the planets in order (8)

what is the difference between a rotation and a revolution and give examples

what are terrestrial (inner) planets

name the terrestrial planets

what are gas (outer) planets

name the gas giant planets

what is an asteroid

where can the most asteroids be found

what is a natural satellite and give an example

put the planets in order of largest to smallest

what is opaque

what are translucent objects

what are transparent objects

what does absorption of heat mean

what does relection of light mean

what is part of the visible spectrum

what does ROYGBIV stand for

what is part of the invisible spectrum

what is the crest of a wavelength

what is the trough of a wavelength

what is white light

what are the seven types of EM waves in order

what are radio waves used for and what are they

what is an infrared rays and what are they used for

what are ultraviolet waves

what are X-rays and what are they used for

what are gamma rays and what are they used for

what is day

what is night

what causes night and day

how long is a cycle of day and night

when is it day

what is night

what is the dark side of the moon

what is a lunar cycle

name the steps of the lunar cycle in order (8)

what is a new moon

what is the waxing crescent

what is a first quarter

what is a waxing gibbous

what is a full moon

what is a waining gibbous

what is the third or last quarter

what is a waining crescent

what are spring tides

what are neap tides

what are seasons

what causes the change of seasons

what causes summer

what causes winter

what causes spring and fall

what are is an equinox

what is a solstice

what is a leap year

what is an eclipse

what is a solar eclipse

what is a lunar eclipse

what are northern lights

what are comets

what is an asteroid

what is a meteoroid

what are shooting stars

what are craters