matter + energy
space
organisms + environment
earth
force, motion, energy
100

equation for density is 

what is density=mass/volume

100

what causes the sun to be bigger and brighter than other stars visible to us

what is its closer

100

where does all energy come from

what is the sun

100

how long does one revolution for earth around the sun take

what is 365.25 days

100

what does potential energy transform into when it moves

what is kinetic energy

200

The last column in a periodic table

what is the noble gases

200

What comes after a waxing crescent

what is first quarter

200

what is the 10% rule in food chains

what is only 10% of energy going to the next consumer level in food chains.

200

what causes seasons on earth

what is earths revolution around the sun

200

what is potential energy

what is energy that is stored up ready to be put into motion

300

atomic number 14 on the periodic table

what is silicon

300

what are red supergiants

biggest of stars, high luminosity, low temperature

300

what is a food chain

what the path energy flow from through the ecosystem. Ex// sun>grass >primary consumer>apex consumer

300

what angle is earths axis tilted at

what is 23.5 degrees

300

what is newtons first law

what is an object in motion stays in motion until acted upon by an outside force

400

determines atomic number in atom

what is protons

400

how many days are in the lunar phases cycle 

what is 28 days

400

what is a food web

what is a series of all the food chains in an ecosystem interlocked in a web

400

If its summer in the northern hemisphere, then what is it in the southern hemisphere

what is winter

400

when does something have the most kinetic energy

what is right before it is acted upon by an outside force

500

determines mass of atom

what is protons + nuetrons

500

what type of star is our sun

what is main sequence

500

what is the last consumer

what is apex predator

500

what causes day and night

what is earths rotation on its axis

500

what is acceleration 

what is the rate of change in velosity

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