Age of Earth

Front

T/F: Geologists use radioactive dating to find the absolute age of rocks

Back

True

Front

What is a half life?

Back

The amount of time it takes for a parent isotope to decay by half.

Front

The radiometric dating of an igneous rock provides ____________.

Back

a date for when the rock formed

Front

The half life of carbon 14 is 5,700 years. How many half lives has a sample rock gone through if 12.5% of the original carbon 14 is left?

Back

3

Front

The oldest rocks on Earth are __________.

Back

4.54 to 4.58 billion years old

Front

What is the most popular hypothesis of the formation of the moon?

Back

The moon formed when a small planet smashed into the newly formed earth sending debris into space which formed the moon.

Front

Scientist think the Earth is ___ years old.

Back

4.5 billion

Front

Some ELEMENTS can decay over time.

Back

True

Front

Geologists use radioactive dating to determine THE ABSOLUTE AGE OF ROCKS.

Back

True

Front

An element that has broken down and released particles and energy is said to be _______________.

Back

radioactive