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Questions and Answers
What is the vernal equinox also known as in the Southern Hemisphere?
What is the vernal equinox also known as in the Southern Hemisphere?
- Summer solstice
- Winter solstice
- Spring solstice
- Autumnal equinox (correct)
In which month does the vernal equinox occur in the Northern Hemisphere?
In which month does the vernal equinox occur in the Northern Hemisphere?
- March (correct)
- December
- September
- June
Which of the following is used to estimate the age of the Earth?
Which of the following is used to estimate the age of the Earth?
- The relative abundance of radioactive isotopes in rocks (correct)
- The size of rocks
- The hardness of rocks
- The color of rocks
What is the main purpose of using radioactive isotopes in estimating the age of the Earth?
What is the main purpose of using radioactive isotopes in estimating the age of the Earth?
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Why are radioactive isotopes used instead of stable isotopes for estimating the age of the Earth?
Why are radioactive isotopes used instead of stable isotopes for estimating the age of the Earth?
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