The History of Life on Earth

The law of superposition states that...

• the oldest rock layers are formed most recently and found at the top of a geologic column.

• the oldest rock layers are formed earliest and found at the top of a geologic column.

• the oldest rock layers are formed earliest and found at the bottom of a geologic column

• the oldest rock layers are formed during multiple time periods and found in the middle of the geologic column.

Tags

NGSS.MS-ESS1-4

A process that determines the exact age of a rock layer based on comparing the amounts of unstable, radioactive particles to stable particles.

• relative age dating

• index fossils

• geologic timescale

• radiometric dating

Tiktaalik is an example of a ____, because it shows how fish evolved into amphibians.

• transitional fossil

• index fossil

• cast fossil

• relative fossil

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

The extinction of species, both plant and animal, have happened regularly over the course of Earth's history.

• True

• False

Tags

NGSS.MS-LS4-1

The age of a rock compared to the ages of other rocks

(a)  

Tags

NGSS.MS-ESS1-4

The age of a rock given as the number of years since it’s formed

(a)  

The preserved remains or traces of an organism that lived in the past

(a)  

Tags

NGSS.MS-LS4-1

The process of determining the age of an object using the half-life of one or more radioactive isotopes

(a)  

Tags

NGSS.MS-ESS1-4

When entire species of living things die off at the same time

(a)  

Tags

NGSS.MS-LS4-1

The bottom layer of rock is

• the oldest
• has fossils

Tags

NGSS.MS-ESS1-4