Environmental Science (Chapter 1 )

Match it! Select the correct answer from the pull down...Good luck!

What do scientists count in order to learn the age of a planetary surface? __________________

Surfaces that have more craters are

________________ is a method of determining the absolute age of an object by comparing the relative percentages of a radioactive (parent) isotope and a stable (daughter) isotope.

________________ is an educated guess.

Which of these is NOT a reason why does Earth has less craters than Mars?

How old is Earth? ____ billion years old.

_____________ is all of space and everything in it including space, stars, and planets.

A process in which the materials of Earth’s surface are loosened, dissolved, or worn away and transported from one place to another is called _________________.