### ROCK OR GAS? 1/2 0.5 50% PLANET SIZES 3/4 0.75 75

```‘PLANET NUMBERS’ ACTIVITY SHEET
e
tun
Mer
cu
ry
ROCK OR GAS?
Captain Smek has decided that planet with a solid surface is best for
the Boov. Can you help Tip work out what fraction of the planets are
• If a planet is made of rock, colour it brown.
• If a planet is made of gas, colour it yellow.
Ear
th
er
p it
Ju
us
Ur a
n
Ve
nu
s
p
Ne
What fraction of the planets are made of rock?
1/2
Can you write this as a decimal?
0.5
Tip’s tricky tester…
50%
Can you write this as a percentage?
M
N
ars
Sat
ur
n
us
Ur a
n
Ve
The Boov like planets that are either very big or very
small. They have decided their new home must have a
radius of less than 10,000 km or more than 30,000 km.
Can you help Tip to work out what fraction of the planets
are the correct size for the Boov to live on?
Mer
cu
ry
nu
s
PLANET SIZES
e
tun
ep
Tip’s tricky tester…
Can you write this as a percentage?
75%
n
0.75
Sat
ur
Can you write this as a decimal?
ars
3/4
M
What fraction of the planets are
the right size for the Boov to live on?
Ear
th
Colour the remaining planets blue.
er
p it
Ju
If a planet’s radius is less than 10,000 km or more than
30,000 km, colour it red.
1
‘PLANET NUMBERS’ ACTIVITY SHEET
PLANET THERMOMETER
Oh really feels the cold and is struggling
to work out which planets will be warm
enough for him. Can you write the planets
next to their temperatures to help him?
460°C Venus
167°C Mercury
Which is the hottest planet?
Venus
Which is the coldest planet?
7.2°C Earth
Uranus
How many planets have an average
temperature below freezing (0° C)?
-55°C Mars
5
How many degrees colder is it
on Mercury than on Venus?
293°C
-145°C Jupiter
-178°C Saturn
-214°C Uranus
-224°C Neptune
2
‘PLANET NUMBERS’ ACTIVITY SHEET
ORDERING THE PLANETS
Oh has got in a muddle with the order of the planets. Can you help
him? Put a 1 in the box next to the planet that is nearest to the Sun (the
shortest distance), a 2 alongside the next shortest distance and so on,
until you get to 8 for the planet furthest away from the Sun.
Which planet is furthest from the Sun?
Mercury
Neptune
How much further is Venus from
the Sun than Mercury? 50 million km
Which planet is closest to the Sun?
PLANET
DISTANCE FROM THE SUN (IN MILLIONS OF KM)
ORDER
Earth
150
3
Uranus
2,880
7
Mercury
58
1
Saturn
1,429
6
Mars
228
4
Neptune
4,504
8
Venus
108
2
Jupiter
778
5
3
‘PLANET NUMBERS’ ACTIVITY SHEET
AN EXTRA CHALLENGE FROM TIP!
Tip knows the radius of each planet, but wants to work out the diameter.
Can you help her by filling in the table below?
What is the difference between
319 km
Which is the largest planet?
PLANET
DIAMETER?
Mercury
2,440 km
4,880 km
Venus
6,052 km
12,104 km
Earth
6,371 km
12,742 km
Mars
3,397 km
6,794 km
Jupiter
71,492 km
142,984 km
Saturn
60,268 km
120,536 km
Uranus
25,559 km
51,118 km
Neptune
24,766 km
49,532 km
RA
DI
U
S
Which is the closest in size to Earth?
Mercury
Jupiter
Venus
Which is the smallest planet?
DIAMETER
4
```