Question 24 3 3 points fossils of organisms with hard

Question
24
3 / 3 points
Fossils of organisms with hard parts (shells) appeared about this long ago:

Question
25
3 / 3 points
Which of the following lists divisions of geologic time in order from largest to smallest?
Question
26
3 / 3 points
The melting of glaciers because of increased concentrations of greenhouse gases from the burning of
fossil fuels involves which of the following earth systems?

biosphere
cyosphere
atmosphere
hydrosphere
all of the above
Question
27
0 / 3 points
A half-life is:
Question options:
half the time it takes for the radioactive daughter to decay
half the time it takes for the radioactive parent to decay
the time it takes for half of the radioactive daughter to decay
the time it takes for half of the radioactive parent to decay
none of the above
Question
28
3 / 3 points
The Earth has a layered internal structure. The core of the Earth is most likely composed of:

iron and nickel
iron and magnesium
iron and oxygen
Question
29
3 / 3 points
According to the scientific method, an untested explanation is a:
Question
30
3 / 3 points
Younger rocks are deposited on top of older rocks. This is known as the:

Principle of Parsimony
Question
31
3 / 3 points
The type of planet characterized by rings, many moons, abundance of hydrogen and helium, large size
and low density is:
Question options:
Terrestrial
Plutonium
Jovial
Jovian
Solar
Question
32
3 / 3 points
The dinosaurs lived during this era:
Question
33
3 / 3 points
The age of the Earth, as determined through radiometric dating is about: