Purple Book 4
Page 19-20
Q and A

Q and A

1.           

Why did Annie
visit Mike’s school again ?

Annie Armstrong visited
Mike’s school again
to answer more questions.

2.           

Who wanted to know
how a day is measured ?

Mike wanted to know
how a day is measured.

3.           

What did Mike do too fast ?

Mike rotated too fast.

4.           

How long does it take
the earth to rotate once ?

It takes the earth
24 hours to rotate once.

5.           

What is a planet’s circular path
around the sun called ?

A planet’s circular path
around the sun is called
an orbit.

6.           

Does the earth
revolve around the sun
or does the sun
revolve around the earth ?

The earth revolves
around the sun.

7.           

How long does it take
the earth to complete
an orbit around the sun ?

It takes the earth 365 days
to complete an orbit
around the sun.

8.           

It takes Mercury 87 days
to complete an orbit
around the sun.
How long is a year
on Mercury ?

A year on Mercury
is 87 days long.

9.           
It takes Jupiter 19 hours
to rotate once.
How long is a day
on Jupiter ?

A day on Jupiter
is 19 hours long.