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BYU EARTH SCIENCE FINAL
EXAM 2025 QUESTIONS AND
ANSWERS.
1. How is the lithosphere different from the mantle? -correct answer - The
mantle is very hot, which causes the lithosphere to move. The
lithosphere is the solid crust on top of the earth.
2. As Earth moves farther from the sun in its orbit, how does the sun's
gravitational force on the earth change? -correct answer - The force of
gravity decreases.
3. What is the difference between chemosynthesis and photosynthesis? -
correct answer - In photosynthesis, sunlight is used to create food
energy In chemosynthesis, heat is used to create food energy.
4. Which planet has a climate that is similar to Earth's climate? -correct
answer - Mars
5. Which of the following is the best definition of lithosphere? -correct
answer - the crust or top layer of rock—both ocean floor and continents
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6. What is the most common element in the universe? -correct answer -
Hydrogen
7. What force holds stars and planets together in a galaxy? -correct answer
- the force of gravity
8. Which of the following is the best definition of atmosphere? -correct
answer - the air around the earth
9. Which are the four terrestrial (Earth-like) planets? -correct answer -
Mercury, Venus, Earth, Mars
10. What do we call the natural development and change of ecosystems?
-correct answer - succession
11. Communication in space requires a signal to be sent by waves with
very large wavelengths. What is the best type of wave to use for a
communication device in space? -correct answer - radio waves
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12. What property makes one type of electromagnetic wave different from
another? -correct answer - The wavelength of each type of radiation is
different.
13. Four students were asked to list one property of a star that can be
measured by analyzing its spectrum. The answers are listed below.
Which student answered incorrectly? -correct answer - Student B: The
spectrum can be used to calculate the mass of the star.
14. Why is it important for us to understand how the natural systems
around us work? -correct answer - so that we will not damage them and
harm ourselves.
15. Why does the climate on Earth change as it rotates around the sun? -
correct answer - Earth is tilted, and the part that receives the most
sunlight changes as Earth orbits the sun.
16. Which of the following is the best definition for biosphere? -correct
answer - the living part of the earth
17. If you lived on a planet near the core of a galaxy, what would the
night sky probably look like? -correct answer - It would have significantly
more stars than what we see at night from Earth.
BYU EARTH SCIENCE FINAL
EXAM 2025 QUESTIONS AND
ANSWERS.
1. How is the lithosphere different from the mantle? -correct answer - The
mantle is very hot, which causes the lithosphere to move. The
lithosphere is the solid crust on top of the earth.
2. As Earth moves farther from the sun in its orbit, how does the sun's
gravitational force on the earth change? -correct answer - The force of
gravity decreases.
3. What is the difference between chemosynthesis and photosynthesis? -
correct answer - In photosynthesis, sunlight is used to create food
energy In chemosynthesis, heat is used to create food energy.
4. Which planet has a climate that is similar to Earth's climate? -correct
answer - Mars
5. Which of the following is the best definition of lithosphere? -correct
answer - the crust or top layer of rock—both ocean floor and continents
, Page |2
6. What is the most common element in the universe? -correct answer -
Hydrogen
7. What force holds stars and planets together in a galaxy? -correct answer
- the force of gravity
8. Which of the following is the best definition of atmosphere? -correct
answer - the air around the earth
9. Which are the four terrestrial (Earth-like) planets? -correct answer -
Mercury, Venus, Earth, Mars
10. What do we call the natural development and change of ecosystems?
-correct answer - succession
11. Communication in space requires a signal to be sent by waves with
very large wavelengths. What is the best type of wave to use for a
communication device in space? -correct answer - radio waves
, Page |3
12. What property makes one type of electromagnetic wave different from
another? -correct answer - The wavelength of each type of radiation is
different.
13. Four students were asked to list one property of a star that can be
measured by analyzing its spectrum. The answers are listed below.
Which student answered incorrectly? -correct answer - Student B: The
spectrum can be used to calculate the mass of the star.
14. Why is it important for us to understand how the natural systems
around us work? -correct answer - so that we will not damage them and
harm ourselves.
15. Why does the climate on Earth change as it rotates around the sun? -
correct answer - Earth is tilted, and the part that receives the most
sunlight changes as Earth orbits the sun.
16. Which of the following is the best definition for biosphere? -correct
answer - the living part of the earth
17. If you lived on a planet near the core of a galaxy, what would the
night sky probably look like? -correct answer - It would have significantly
more stars than what we see at night from Earth.
