the surface of the earth's moon
the surface of Jupiter
the surface of Saturn

2) How big is the planet Mercury?

The planet Mercury is about 48 780 kilometres in diameter.
The planet Mercury is about 4 878 kilometres in diameter.
The planet Mercury is about 487 kilometres in diameter.
The planet Mercury is about 48 kilometres in diameter.

3) What does the craters on planet Mercury look like?

like the craters on planet Jupiter
like the craters on the Moon

4) Which spacecraft helped astronomers learn a lot about Mercury?

Luna 10
Apollo 10
Mariner 10

5) Mercury is one of the smallest planets.

True
False

6) Which planet is the closest to the Sun?

Earth
Venus
Mercury

7) Pick the false statement:

Mercury's magnetic field means there is iron inside Mercury.
Mercury has at least 10 very active volcanoes.
Mercury has a high density when compared to planet Jupiter.
Mercury has a very thin atmosphere that contains some argon, neon and helium.

8) How many moons does the planet Mercury have ?

one
two
none

9) Do you find lava flows, mountains and craters on the surface of the planet Mercury?

Yes
No

10) Pick the incorrect statement:

The planet Mercury does not have polar ice caps.
Mercury is the easiest to see only around midnight.
Just like the moon, the planet Mercury also has phases.