6th ES Geologic Time 5.3

Open Ended

How do scientists determine the age of Earth's features?

Multiple Choice

Which rock layer is the youngest?

• J

• V

• M

• R

• T

Multiple Choice

Which rock layer is the oldest?

• J

• V

• M

• R

• T

Multiple Choice

The fault (Gf) occurred AFTER the time of which layer?

• J

• V

• M

• R

• T

Multiple Choice

Which fossil is the oldest?

Multiple Choice

Which fossil is the youngest?

Multiple Choice

Carbon 14, which can be used to date fossils, has a half-life of 5,730 years. If a sample starts with 12 atoms of Carbon 14, how many will be left after 5,730 years?

• 12

• 3

• 6

• 0

Multiple Choice

Carbon 14, which can be used to date fossils, has a half-life of 5,730 years. If a sample starts with 12 atoms of Carbon 14, how many will be left after 11,460 years (2 half-lives)?

• 12

• 3

• 6

• 0

Multiple Choice

Which eon occurred the longest ago?

• Hadean

• Archean

• Proterozoic

• Phanerozoic

Multiple Choice

During which eon is the Pleistocene epoch?

• Hadean

• Archean

• Proterozoic

• Phanerozoic

Multiple Choice

Which organisms were common during the Mesozoic era?

• insects

• dinosaurs

• mammals

Multiple Choice

Is Wikipedia considered a reliable, scientific source?

• Yes

• No

Multiple Choice

Is google.com a source?

• Yes

• No