scirnece

what is a comet

• ball

• dust

• pices

• a ball of dust gas or ice that orbits the surface.

what is eras

• era

• periods

• pleozoic, mesozoic, cenozoic

• space

what are periods

• three

• 4

• 5

• there are three periods the jurassic triassic taceous.

geologic time scale what is it.

• a record

• scale

• time

• is a recored of geologic events and evolution.

what is density

• ait

• mass

• help

• it the measure of how much mass is in the volume given

what is maga

• molt

• volcano

• mixture of rock forming .

• nk

what is lava

• cool

• warm

• hot

• forms into a solid rock.

what is plate tectonics

• throies

• motion

• constant

• when earth plates go slowly

divergent boundary

• come close

• sperate

• they come closer together

• along eachother.

convergent boundary

• come close

• apart

• they slip past each other

• go across.