enSCReview Puzzle15
billion: Earth formed 4.6 _____ years ago
platentesimals: These collided to help form Earth
millions: Earth's oceans formed when it cooled and rained for _____ of years
volcano: This brought new gases to Earth's atmosphere when it erupted
comets: _____ also brought new gases to Earth's atmosphere from space
dioxide: Our atmosphere use to have a lot of Carbon _____
nitrogen: Now our atmosphere is mostly made out of _____
tectonic: Our continents have moved over time because of _____ plates
physical: _____ weathering is caused by forces from wind and water
chemical: _____ weathering is caused by reactions. example-acid rain
direct: _____ light hits mostly near the equator making that area warmer.
radiometric: We can find the age of fossils and rocks by _____ dating
half: Scientists look at radioactive materials inside the rocks and fossils and see how many ___ lives
parent: _____ isotope is the original radioactive material
daughter: Once the radioactive material is stable, it is called ____ isotope
Review Puzzle
LVONCAO
This brought new gases to Earth's atmosphere when it erupted
RCIDTE
_____ light hits mostly near the equator making that area warmer.
PSHICYAL
_____ weathering is caused by forces from wind and water
AETPNR
_____ isotope is the original radioactive material
ISLNOILM
Earth's oceans formed when it cooled and rained for _____ of years
IACLEMHC
_____ weathering is caused by reactions. example-acid rain
ETMSCO
_____ also brought new gases to Earth's atmosphere from space
OIBLNIL
Earth formed 4.6 _____ years ago
NGOTIRNE
Now our atmosphere is mostly made out of _____
RACIOTREIDM
We can find the age of fossils and rocks by _____ dating
TOTNECIC
Our continents have moved over time because of _____ plates
HFAL
Scientists look at radioactive materials inside the rocks and fossils and see how many ___ lives
TAHGURED
Once the radioactive material is stable, it is called ____ isotope