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 9
Describe how scientists know about the structure of Earth's interior.
Describe the difference between continental crust and oceanic crust.
Describe the role of the Earth's magnetic field in protecting life on Earth.
Explain how convection currents in the mantle affect the movement of tectonic plates.
Explain why seismic waves travel at different speeds through different layers of the Earth.
Explain why the inner core remains solid despite extremely high temperatures.
A geologist is studying a region where seismic waves suddenly speed up at a certain depth. What does this change in speed indicate about the Earth's structure at that depth?
Consider a scenario where a new planet is discovered with a similar layered structure to Earth, but its core is composed mainly of copper and zinc. Predict how this might affect the planet's magnetic field compared to Earth's, and explain your reasoning.
Which of the following best describes the composition of the mantle?
(1) Mostly iron and nickel
(2) Silicate rocks rich in magnesium and iron
(3) Water and gases
(4) Pure carbon
Which of the following best describes the mantle?
(1) Solid rock that flows slowly
(2) Liquid metal
(3) Rigid and brittle
(4) Gaseous layer
Which of the following best explains why the Earth's outer core is liquid?
(1) It is made of gases
(2) The temperature is high enough to melt iron and nickel, but the pressure is lower than in the inner core
(3) It is made of water
(4) It is exposed to the atmosphere
Which of the following is NOT a layer of the Earth?
(1) Crust
(2) Mantle
(3) Stratosphere
(4) Outer Core
The boundary between the crust and the mantle is called the ________.
The boundary between the mantle and the outer core is called the ________ discontinuity.
The Earth's core makes up about ________ percent of the Earth's total mass.
The Earth's crust is ________ compared to the other layers.
True or False: The asthenosphere is part of the upper mantle.
True or False: The Earth's mantle is completely solid and does not flow.
True or False: The inner core is hotter than the outer core.
True or False: The lithosphere is broken into tectonic plates.
