18 Questions
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.
What is the effect of the Moon's gravity on the Earth's rotation?
It decreases the Earth's rotation speed.
What is the term for the darkening of the Moon's surface during a lunar eclipse?
Earth's shadow
What is the name of the type of lunar eclipse where the Earth's shadow partially covers the Moon's surface?
Partial lunar eclipse
What is the term for the layer of gases surrounding a planet or celestial body?
Atmosphere
What is the phenomenon where the Moon passes between the Sun and the Earth, casting a shadow on the Earth?
Solar eclipse
What is the oldest name for the planet Earth?
Tellus
What is the third planet from the Sun in our solar system?
Earth
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
Why is Pluto no longer considered a planet?
It has not cleared the neighborhood of its orbit
How long does it take Earth to complete one revolution around the Sun?
About 365.25 days
How long does it take Earth to rotate around its own axis?
About 23 hours and 56 minutes
What is the outer core composed of?
Liquid iron and nickel
What is the main difference between the upper and lower mantle?
Rigidity
How many seismic discontinuities are there in the Earth's inner structure?
5
What is the inner core believed to be composed of?
Solid iron and nickel
What is the process responsible for generating the Earth's magnetic field?
Dynamo effect
What is the purpose of the discontinuities in the Earth's inner structure?
To define the layers of the Earth's interior
Test your knowledge of Earth's rotation, orbit, and seasons. Learn how the planet's tilt affects the length of days and nights, and its relation to the Sun. Discover the Earth's orbit and its satellite, the Moon.
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