Planets
Which planets are inner planets?
Mercury, Venus, Earth, Mars
Name one dwarf planet other than Pluto
Ceres, Eris
The movement of a celestial body orbiting another celestial body is called.....
hint: same in spanish/english
Revolution
gravity
What is the lightest gas?
Hydrogen
Which planets are outer planets?
Jupiter, Saturn, Uranus, Neptune
rocky celestial bodies that are too small to be considered planets
Asteroids
The amount of time it takes a celestial body to complete its orbit. Earth's ______ is 365 days.
Revolution period
Who proposed the law of universal gravitation?
Newton
1. When is it summer in the Southern hemisphere?
2. Name 1 country in the southern hemisphere.
December, January, and February
Which dwarf planet was kicked out of the solar system in 2006?
Pluto
What group of planets have a crust made of rocks and a core made of metal?
The spin of a body on its axis. Earth's ______ period is one day
Rotation
How do you calculate the weight of something?
weight = (mass of object) * (acceleration of gravity)
Why is it hotter in the summer?
During the summer, the sun's rays hit the Earth at a steep (intense) angle. The light does not spread out as much, thus increasing the amount of energy hitting any given spot.
Name the planets in order of distance from the sun
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
This planet has 1 satellite
Earth (the moon is our satellite)
True or False: We always see the same side of the moon from Earth
TRUE
Calculate the weight of a body with a mass of 5kg on Mars. Gravity is 3.8N/kg on Mars.
W= m * 3.8N/kg
W= 5kg * 3.8N/kg
19 N
What particle is light made of?
photons
Name one planet that is a "gas giant"
Neptune, Uranus, Saturn, and Jupiter
Halley's Comet
Explain why there are different seasons on Earth.
Earth has seasons because its axis is tilted. Earth’s axis is always pointed in the same direction, so different parts of Earth get the sun’s direct rays throughout the year.
For example, in summer, the sun's rays hit one region more directly than at any other time of the year.
Gravity on the moon is 1.6N/kg
Gravity on Earth is 9.8N/kg
What is the weight of an object on Mars, if on Earth it weighs 25N?
Earth:
25 Newtons = m * 9.8 N/kg
m = 2.55 kg
Moon:
N = 2.55 kg * 1.6 N/kg
N = 4.08 Newtons
What is the most eaten fruit in the world?
Tomatoes