When will a fossil be used in finding the absolute age of rocks?(1 point)
Responses
if it existed for a limited period of time and in a wide area
if it existed for a limited period of time and in a wide area
if it existed for a limited period of time and in a small area
if it existed for a limited period of time and in a small area
if it existed for a long period of time and in a wide area
if it existed for a long period of time and in a wide area
if it existed for a long period of time and in a small areae of rocks?
7 answers
The correct answer is: if it existed for a limited period of time and in a wide area.
Which quantity helps determine the absolute age of rocks and fossils?(1 point)
Responses
the ratio of protons to neutrons in carbon-14
the ratio of protons to neutrons in carbon-14
the difference between the amounts of carbon-12 and carbon-14
the difference between the amounts of carbon-12 and carbon-14
the ratio of carbon-12 to carbon-14
the ratio of carbon-12 to carbon-14
the difference between the number of protons and neutrons in carbon-14
the difference between the number of protons and neutrons in carbon-14
Responses
the ratio of protons to neutrons in carbon-14
the ratio of protons to neutrons in carbon-14
the difference between the amounts of carbon-12 and carbon-14
the difference between the amounts of carbon-12 and carbon-14
the ratio of carbon-12 to carbon-14
the ratio of carbon-12 to carbon-14
the difference between the number of protons and neutrons in carbon-14
the difference between the number of protons and neutrons in carbon-14
The correct answer is: the ratio of carbon-12 to carbon-14.
Use this paragraph: The half-life of carbon-14 is 5,700 years. A certain sample of wood has 20 grams of carbon-14 when it is alive.
How many grams of carbon will it have after 5,700 years?
(1 point)
Responses
2 grams
2 grams
5 grams
5 grams
40 grams
40 grams
10 grams
How many grams of carbon will it have after 5,700 years?
(1 point)
Responses
2 grams
2 grams
5 grams
5 grams
40 grams
40 grams
10 grams
The correct answer is: 10 grams.
Which statement best describes why most individual organisms never fossilized?(1 point)
Responses
Conditions for fossilization are rare.
Conditions for fossilization are rare.
Chemicals that fossilize organisms are rare.
Chemicals that fossilize organisms are rare.
Only organisms with hard parts fossilize.
Only organisms with hard parts fossilize.
Only organisms that lived in the ocean fossilize.
Responses
Conditions for fossilization are rare.
Conditions for fossilization are rare.
Chemicals that fossilize organisms are rare.
Chemicals that fossilize organisms are rare.
Only organisms with hard parts fossilize.
Only organisms with hard parts fossilize.
Only organisms that lived in the ocean fossilize.
The correct answer is: Conditions for fossilization are rare.
2 answers