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Science: Earth and the Universe
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Which satellite is used to take pictures of distant galaxies?
The Hubble Space Telescope
What is GPS used for?
Detecting the ground position of objects.
What does GPS stand for?
Global Positioning System
How long does the ISS take to orbit Earth once?
About 1.5 hours
What is the largest human-made satellite?
The International Space Station (ISS)
Who was Laika?
The first living creature to orbit Earth.
Which country launched Sputnik 1?
The Soviet Union
What was the first artificial satellite?
Sputnik 1
What are satellites used for?
Communications, photography, surveying, and navigation.
What are artificial satellites?
Human-made objects that orbit Earth or other planets.
How does the tilt of the Earth affect the planet?
It causes the seasons
What shape did Ptolemy use to describe planets and stars?
Spheres
What does the word “geo” mean in Latin?
Earth
Who said planets move in elliptical orbits?
Johannes Kepler
Who used a telescope to study the planets and support Copernicus’ idea?
Galileo Galilei
Who developed the heliocentric model?
Nicolaus Copernicus
Which Greek philosopher believed the Earth was the center of the universe?
Aristotle
In the geocentric model, what is at the center of the universe?
Earth
The extra six hours every year create what special year?
A leap year
What does Earth’s revolution cause?
The different seasons
How long does it take Earth to complete one revolution around the Sun?
365 days and six hours
What does Earth’s rotation cause?
Day and night
How long does it take Earth to make one rotation?
24 hours
Earth moves in two different ways. What are they?
Rotation and revolution
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