Flashcard Module 22 Lesson 2

Front

What is Mercury's position relative to other planets in our solar system?

Back

Closest to the Sun

Front

How does Mercury's size compare to Earth's?

Back

It is one-third the size of Earth

Front

What is unique about Mercury's day-night temperature difference?

Back

It has the largest temperature difference among all planets.

Front

How many moons does Mercury have?

Back

None

Front

What is the primary composition of Mercury's core?

Back

Nickel and iron

Front

What is the duration of Mercury's spin (rotation period)?

Back

1407.6 hours

Front

What is a distinctive geological feature found on Mercury's surface?

Back

Scarps (cliffs)

Front

What is one component of Mercury's thin atmosphere?

Back

Sodium

Front

Which celestial body did Mariner 10 use for gravitational assist?

Back

Venus

Front

What type of surface does Mercury have?

Back

Solid and rocky