Composition of Planets
What are the four inner planets?
Mercury, Venus, Earth, and Mars
Question: What force pulls objects toward Earth?
Answer: What is gravity?
Question: What is the amount of matter in an object called?
What is mass?
Question: What is the closest star to Earth?
The Sun
Which planet is known as the Red Planet
Mars
What are the four outer planets?
Jupiter, Saturn, Uranus, and Neptune
Question: Why do planets stay in orbit around the Sun?
Answer: The Sun's gravity keeps them in orbit.
Question: Which changes if you travel from Earth to the Moon: mass or weight?
Weight
What are stars mostly made of?
Hot gases (hydrogen and helium)
Which planet is famous for its ring system.
Saturn
Question: What type of planets are Mercury, Venus, Earth, and Mars?
Answer: Terrestrial (rocky) planets
Question: Which would have more gravitational pull: a basketball or a mountain?
Answer: A mountain
Question: Why does weight change from planet to planet?
Answer: Because gravity is different on different planets.
Question: Which color star is hotter: blue or red?
Blue
What does a star`s color tell scientists?
The stars temperature.
Question: This region of space is located between Mars and Jupiter.
Answer: What is the Asteroid Belt?
Question: True or False: All objects with mass have gravity.
True
Question: A student has a mass of 50 kg on Earth. What is their mass on the Moon?
Answer: 50 kg
Question: What process causes stars to produce light and heat?
Atoms hitting each other and creating other atoms (Nuclear Fusion)
Question: Why does the Moon experience greater temperature changes than Earth?
It has very little atmosphere.
Question: Earth is 1 AU from the Sun. Neptune is about 30 AU from the Sun. Which planet has the longer year and why?
Answer: Neptune because it is farther from the Sun and takes longer to orbit.
Question: Explain what happens to gravitational force when the mass of an object increases.
Answer: The gravitational force increases.
Question: Explain the difference between mass and weight.
Answer: Mass is the amount of matter in an object. Weight is the force of gravity acting on that mass.
Question: Name three properties scientists use to study stars.
Color, temperature, brightness, or size
Question: A student travels from Earth to the Moon. Describe what happens to their mass and weight.
Their mass stays the same, but their weight decreases because the Moon has less gravity.