PAX PAX Earth Science 1 ā Questions and Answers
Question 1: What is the correct order of Earth's layers from the surface to the center?
- Crust, Mantle, Outer Core, Inner Core (Correct answer)
- Crust, Outer Core, Mantle, Inner Core
- Mantle, Crust, Outer Core, Inner Core
- Crust, Inner Core, Outer Core, Mantle
Correct answer: Crust, Mantle, Outer Core, Inner Core
Earth's layers from surface to center are: crust, mantle, outer core (liquid), and inner core (solid).
Question 2: What type of rock is formed when magma cools and solidifies?
- Sedimentary
- Metamorphic
- Igneous (Correct answer)
- Composite
Correct answer: Igneous
Igneous rock forms when magma (underground) or lava (at the surface) cools and solidifies.
Question 3: Which layer of Earth's atmosphere contains the ozone layer?
- Troposphere
- Stratosphere (Correct answer)
- Mesosphere
- Thermosphere
Correct answer: Stratosphere
The ozone layer is located in the stratosphere, approximately 15ā35 km above Earth's surface, where it absorbs harmful UV radiation.
Question 4: What is the process called when water vapor cools and changes into liquid water?
- Evaporation
- Sublimation
- Condensation (Correct answer)
- Precipitation
Correct answer: Condensation
Condensation is the process by which water vapor loses energy and changes into liquid water, forming clouds or dew.
Question 5: What is the most abundant gas in Earth's atmosphere?
- Oxygen
- Carbon dioxide
- Argon
- Nitrogen (Correct answer)
Correct answer: Nitrogen
Nitrogen (Nā) makes up approximately 78% of Earth's atmosphere, while oxygen accounts for about 21%.
Question 6: What type of plate boundary forms when two continental plates collide?
- Divergent boundary
- Transform boundary
- Convergent boundary (Correct answer)
- Passive boundary
Correct answer: Convergent boundary
Convergent boundaries form when two plates move toward each other; colliding continental plates create mountain ranges like the Himalayas.
Question 7: Which process in the water cycle involves liquid water changing into water vapor?
- Condensation
- Evaporation (Correct answer)
- Precipitation
- Infiltration
Correct answer: Evaporation
Evaporation occurs when liquid water absorbs heat energy and transforms into water vapor, rising into the atmosphere.
PAX PAX Earth Science 1
What is the correct order of Earth's layers from the surface to the center?