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Earth's Tilt and Seasons

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Questions and Answers

What is the primary reason for the variation in the length of days and nights between winter and summer in either hemisphere?

The Earth's axis of rotation is tilted with respect to its orbital plane around the Sun. (correct)

The Earth's distance from the Sun changes significantly throughout the year.

The Earth's rotation is influenced by the gravitational pull of the Moon.

The Earth's orbit is elliptical in shape.

What is the effect of the Moon's gravity on the Earth's rotation?

It increases the Earth's rotation speed.

It decreases the Earth's rotation speed. (correct)

It causes the Earth's rotation to become irregular.

It has no significant effect on the Earth's rotation.

What is the term for the darkening of the Moon's surface during a lunar eclipse?

Lunar occultation

Eclipse totality

Earth's shadow (correct)

Tidal locking

What is the name of the type of lunar eclipse where the Earth's shadow partially covers the Moon's surface?

Partial lunar eclipse Signup and view all the answers

What is the term for the layer of gases surrounding a planet or celestial body?

Atmosphere Signup and view all the answers

What is the phenomenon where the Moon passes between the Sun and the Earth, casting a shadow on the Earth?

Solar eclipse Signup and view all the answers

What is the oldest name for the planet Earth?

Tellus Signup and view all the answers

What is the third planet from the Sun in our solar system?

Earth Signup and view all the answers

What is the criteria for a celestial body to be considered a planet?

It must be round, orbit the Sun, and have cleared the neighborhood of its orbit Signup and view all the answers

Why is Pluto no longer considered a planet?

It has not cleared the neighborhood of its orbit Signup and view all the answers

How long does it take Earth to complete one revolution around the Sun?

About 365.25 days Signup and view all the answers

How long does it take Earth to rotate around its own axis?

About 23 hours and 56 minutes Signup and view all the answers

What is the outer core composed of?

Liquid iron and nickel Signup and view all the answers

What is the main difference between the upper and lower mantle?

Rigidity Signup and view all the answers

How many seismic discontinuities are there in the Earth's inner structure?

5 Signup and view all the answers

What is the inner core believed to be composed of?

Solid iron and nickel Signup and view all the answers

What is the process responsible for generating the Earth's magnetic field?

Dynamo effect Signup and view all the answers

What is the purpose of the discontinuities in the Earth's inner structure?

To define the layers of the Earth's interior Signup and view all the answers