Earth’s Structure and Layers
Physics ⇒ Earth and Space Physics
Earth’s Structure and Layers starts at 6 and continues till grade 12.
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See sample questions for grade 10
Describe how the density of Earth's layers changes from the crust to the core.
Describe the main differences between the lithosphere and the asthenosphere.
Explain how seismic waves help scientists study the structure of the Earth's interior.
Explain why the Earth's crust floats on the mantle.
If a seismic P-wave travels through the Earth and is detected on the opposite side, what does this indicate about the Earth's interior?
A geologist is studying a region where seismic S-waves suddenly disappear at a certain depth. What does this indicate about the properties of the Earth's layer at that depth?
A deep mine reaches a depth where the temperature is 50°C higher than at the surface. If the geothermal gradient is 25°C per kilometer, how deep is the mine?
A scientist is analyzing seismic data and observes that P-waves slow down significantly at a certain depth, while S-waves disappear completely. Explain what this reveals about the composition and state of the Earth's layer at that depth.
The Earth's core is mainly composed of which two elements?
(1) Iron and Nickel
(2) Oxygen and Silicon
(3) Magnesium and Aluminum
(4) Carbon and Hydrogen
The Earth's mantle is mainly composed of which type of rock?
(1) Sedimentary
(2) Igneous
(3) Metamorphic
(4) Peridotite
Which of the following best describes the asthenosphere?
(1) Rigid and brittle
(2) Semi-fluid and ductile
(3) Completely liquid
(4) Completely solid
Which of the following best explains why S-waves do not travel through the Earth's outer core?
(1) The outer core is too cold
(2) The outer core is solid
(3) The outer core is liquid
(4) The outer core is made of gas
Fill in the blank: The Earth's ________ is the thinnest layer.
The boundary between the Earth's crust and mantle is called the ________.
The boundary between the mantle and the outer core is called the ________ discontinuity.
The Earth's crust is divided into two main types: ________ crust and ________ crust.
The Earth's crust is thicker under the continents than under the oceans. True or False?
The temperature increases as you go deeper into the Earth. True or False?
True or False: The asthenosphere is completely solid and does not flow over geological time scales.
True or False: The Earth's inner core rotates at a different speed than the rest of the planet.
