Mercury
Is Mercury smaller or bigger than Earth?
Smaller-
Mercury is smaller than half the size of Earth!
What number planet is Venus in the solar system?
2nd
Is Venus or Earth larger?
Earth!
What number planet is Mars in the solar system?
4th!
What is the largest object in the solar system?
The Sun
How many moons does Mercury have?
Is Venus the brightest object in the solar system?
NO! It is the brightest planet but the second brightest object- the sun is the brightest object!
How fast does Earth orbit the sun?
18.5 miles per second or 67,000mph
How many moons does Mars have?
2
In mythology, which two planets are in a secret relationship?
Venus and Mars
How long does it take Mercury to orbit the sun?
88 days
What does Venus have on it's surface?
volcanoes
Earth is the one and only planet to.....
Have life
have known liquid on its surface
have oxygen level of 20% or greater in it's atmosphere
have one large satellite
What is the name of the largest mountain in the solar system?
Olympus Mons
How are the inner planets different from the outer planets?
Inner planets are made of mostly rock and metal, outer planets are made of mostly helium, hydrogen and other gases
Why is Mercury not the hottest planet?
Mercury doesn't have any atmosphere, so the heat from the sun goes right back into space
How hot is it on the surface of Venus?
900 degrees F or more
Earth is named for which Greek titan?
Gaia
Mars used to have what on its surface?
liquid water
active volcanoes
What is another name for the inner planets?
terrestrial planets
How many degrees is the range of temperature on Mercury?
1080 degrees F between high and low
Why can you not see the surface of Venus with an ordinary telescope?
It is covered with thick clouds of water vapor and sulphuric acid.
Earth is classified as what type of planet?
a "Goldilocks" planet
What is Mars nickname? Why?
The "Red Planet" because the surface is covered in a mineral that has a red color to it
Which planet has a longer day than its year?
Venus
What is Mercury's surface covered with?
Craters
Why is Venus sometimes called "Earth's sister?"
Because they are similar in size and gravity
Why do we have a "leap year" or one extra day a year every four years on Earth?
It takes Earth 365.25 days to orbit around the Sun. The 1/4 days are added up every fourth year for an extra day (366 days in the leap year).
How is Mars similar to Earth?
The axis rotation for day/night on Mars only lasts 24 hours and 36 minutes. That is very similar to Earth’s axis rotation.
Who is the scientist who studied gravity and proved that the planets orbit around the sun?
Sir Issac Newton
Mercury is the Roman god of Speed. Name one other thing he is the god of.
Messenger
Thieves
Medicine
Travelers
What are the two very unique things about the movement of Venus?
Its day is longer than its year
It rotates in the opposite direction
What percentage of the Earth's surface is covered by water?
70-75% (technically 71%)
What is the temperature range on Mars?
311 degrees F
Which two planets currently have the "greenhouse effect"?
Venus and Earth