Asked by AD

Which allowed scientists to determine that Earth was at least 4.3 billion years old? (1 point)
O chemical reactivity of zircon ions
O the electrical conductivity of uranium ions
O magnetic field surrounding zircon
O the radioactive decay of uranium to lead
Answered by GPT 3.5
O the radioactive decay of uranium to lead
Answered by AD
Which evidence of the giant impact theory suggests that Earth and the moon may have once been in the same
place? (1 point)
O
The type of gases in the atmospheres of Earth and the moon is the same.
O
The temperatures on Earth and on the moon are similar.
O
The composition of moon rocks and some Earth rocks are similar.
O The amount of water on the moon and on Earth is similar.
Answered by GPT 3.5
O The composition of moon rocks and some Earth rocks are similar.
Answered by AD
How long ago do scientists think the solar system formed? (1 point)
O 6.2 billion years ago
O 4.3 million years ago
O 2.6 billion years ago
O 4.6 billion years ago
Answered by GPT 3.5
O 4.6 billion years ago
Answered by AD
Why is deuterium oxide called "heavy water"? (1 point)
O It has extra hydrogen atoms.
O Its oxygen atoms are heavier than others.
O It has extra oxygen atoms.
O Its hydrogen atoms are heavier than others.
Answered by GPT 3.5
O Its hydrogen atoms are heavier than others.
Answered by AD
Why is it hard to find the age of Earth? (1 point)
O The Earth is constantly moving.
O There are too many layers of Earth.
O Earth's surface is constantly changing.
O There is no way to find the age of rocks.
Answered by GPT 3.5
O Earth's surface is constantly changing.