Cambridge Primary (1-6). Stage 3. Science. Workbook - Unit 6: The Earth and the Moon

Group these objects by shape by writing their names in the correct part of the table.

Objects: Earth, can, Moon, cardboard box, pencil, book, football, Sun.

| Sphere | Cuboid | Cylinder |
|---|---|---|
| | | |

Look at this fact file about the Earth, Sun and Moon and answer the questions.

| Name | Shape | Material | Size | Mass | Gravity |
|---|---|---|---|---|---|
| Sun | sphere | gas | 1 392 684 km | 1 989 100 000 000 billion billion kg | 293 N/kg |
| Earth | sphere | rock and water | 12 756 km | 5 972 190 billion billion kg | 10 N/kg |
| Moon | sphere | rock | 3 475 km | 641 693 billion billion kg | 2 N/kg |

Use the supplied workbook values for this exercise; they are not a precise astronomical reference.

What shape is the Moon?

Look at this fact file about the Earth, Sun and Moon and answer the questions.

| Name | Shape | Material | Size | Mass | Gravity |
|---|---|---|---|---|---|
| Sun | sphere | gas | 1 392 684 km | 1 989 100 000 000 billion billion kg | 293 N/kg |
| Earth | sphere | rock and water | 12 756 km | 5 972 190 billion billion kg | 10 N/kg |
| Moon | sphere | rock | 3 475 km | 641 693 billion billion kg | 2 N/kg |

Use the supplied workbook values for this exercise; they are not a precise astronomical reference.

What material is the Sun made of?

Look at this fact file about the Earth, Sun and Moon and answer the questions.

| Name | Shape | Material | Size | Mass | Gravity |
|---|---|---|---|---|---|
| Sun | sphere | gas | 1 392 684 km | 1 989 100 000 000 billion billion kg | 293 N/kg |
| Earth | sphere | rock and water | 12 756 km | 5 972 190 billion billion kg | 10 N/kg |
| Moon | sphere | rock | 3 475 km | 641 693 billion billion kg | 2 N/kg |

Use the supplied workbook values for this exercise; they are not a precise astronomical reference.

Which has the biggest mass?

Look at this fact file about the Earth, Sun and Moon and answer the questions.

| Name | Shape | Material | Size | Mass | Gravity |
|---|---|---|---|---|---|
| Sun | sphere | gas | 1 392 684 km | 1 989 100 000 000 billion billion kg | 293 N/kg |
| Earth | sphere | rock and water | 12 756 km | 5 972 190 billion billion kg | 10 N/kg |
| Moon | sphere | rock | 3 475 km | 641 693 billion billion kg | 2 N/kg |

Use the supplied workbook values for this exercise; they are not a precise astronomical reference.

Which has the strongest gravity?

Look at this fact file about the Earth, Sun and Moon and answer the questions.

| Name | Shape | Material | Size | Mass | Gravity |
|---|---|---|---|---|---|
| Sun | sphere | gas | 1 392 684 km | 1 989 100 000 000 billion billion kg | 293 N/kg |
| Earth | sphere | rock and water | 12 756 km | 5 972 190 billion billion kg | 10 N/kg |
| Moon | sphere | rock | 3 475 km | 641 693 billion billion kg | 2 N/kg |

Use the supplied workbook values for this exercise; they are not a precise astronomical reference.

How many times stronger is gravity on Earth than on the Moon?

Read this information and answer the questions.

In the past some people thought the Earth was flat. We now know it is a sphere because people have gone all the way around. If the Earth was flat, they would have found the edge. We also have photographs taken from space showing that the Earth is a sphere.

Write two things that show us that the Earth is not flat.

Read this information and answer the questions.

In the past some people thought the Earth was flat. We now know it is a sphere because people have gone all the way around. If the Earth was flat, they would have found the edge. We also have photographs taken from space showing that the Earth is a sphere.

Why are the Earth, the Moon and the Sun all spheres?

Read this information and answer the questions.

In the past some people thought the Earth was flat. We now know it is a sphere because people have gone all the way around. If the Earth was flat, they would have found the edge. We also have photographs taken from space showing that the Earth is a sphere.

Why might people think that the Earth was flat?

Are these sentences true or false?

The Earth and the Moon are both spheres.

Are these sentences true or false?

The Moon is larger than the Earth.

Are these sentences true or false?

The Moon goes around the Earth.

Are these sentences true or false?

The Moon’s orbit is a circle.

Are these sentences true or false?

The Moon takes one day to orbit the Earth.

Arun and Zara are modelling the Earth and the Moon. Zara is holding a football and Arun is holding an orange.

What is the Moon in this model?

Arun and Zara are modelling the Earth and the Moon. Zara is holding a football and Arun is holding an orange.

What is the Earth in this model?

Arun and Zara are modelling the Earth and the Moon. Zara is holding a football and Arun is holding an orange.

Who should move in this model?

Arun and Zara are modelling the Earth and the Moon. Zara is holding a football and Arun is holding an orange.

Write one way the model is similar to the real Earth and Moon.

Arun and Zara are modelling the Earth and the Moon. Zara is holding a football and Arun is holding an orange.

Write one way the model is different to the real Earth and Moon.

Marcus is making a scale model of the planets in our Solar System. He is using the scale 1000 km = 1 cm.

Fill in the table to show how big each planet should be in the model. Two of them have been done for you.

| Planet | Size of real planet (km) | Size of model planet (cm) |
|---|---:|---:|
| Mercury | 5000 | ___ |
| Venus | 12 000 | ___ |
| Earth | 13 000 | 13 |
| Mars | 7000 | ___ |
| Jupiter | 140 000 | ___ |
| Saturn | 116 000 | ___ |
| Uranus | 51 000 | ___ |
| Neptune | 49 000 | 49 |