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 many layers does Earth have?
Four Layers
How many moons does Mars have?
2
Who is the scientist who invented calculus to describe the elliptical orbits of the planets
Isaac Newton
What is Mercury's surface covered with?
Craters
What does Venus have on it's surface?
Continents, Mountains, and Craters
Have life
have known liquid on its surface
have oxygen level of 20% or greater in it's atmosphere
have one large satellite
What does Mars have on its surface?
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
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.
What percentage of Earth is covered with water?
70%
What is Mars nickname? Why?
The "Red Planet" because the surface is covered in a mineral that has a red color to it
Name FOUR other objects in the solar system besides the planets?
Sun, Moons, Asteroids, Comets, dwarf planets
What is Mercury's nick name?
"The Swift Planet" because it orbits the sun very quickly- takes only 88 days!
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 39 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?
Galileo