History of Life on Earth

The calculation of the age of an object by measuring the proportions of the radioactive isotopes of certain elements is 

• relative dating
• radiometric dating
• uranium dating
• isometric dating

The idea that Earth's early oceans had organic molecules that became the first life is called.

• primordial soup
• bubble hypothesis
• Miller-Urey Experiment
• radioactive dating theory

___________________ evolved after RNA

• amino acids
• atoms
• DNA
• molecules

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.

I was out fossil hunting and was lucky enough to find a fossil. Based on the geologic column, about how old would you expect my fossil to be?

• 25 million years (mya)

• 50 million years (mya)

• 75 million years (mya)

• 100 million years (mya)

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

The series of time divisions that mark Earth's long history.

• Index fossil

• Fossil record

• Geologic column

• Geologic timescale

HOW OLD IS THE EARTH WE LIVE IN?

• 4,6 billion years old

• 2000 YEARS OLD

• 5 BILLION YEARS OLD

What does the law of superposition state?

• The newest layer of rock is on the bottom

• The newest layer of rock is on the top

Cells without a nucleus are said to be _____________________.

• Eukaryotic
• Prokaryotic