The audience can see the shadows of puppets when we use opaque materials instead of translucent paper for a theatre screen.

We can make a shadow puppet because our hands are opaque.

Sunglasses that are more opaque than other glasses are called translucent materials.

The object which allows light to pass through partially is called an opaque object.

Egg shell is a transparent material.

When light is shone on a book, a dark shadow is formed.

When light is shone on an object which allows all the light to pass through it, so that object is called translucent materials.

We cannot see things clearly through frosted glasses because they are translucent materials.

Bubble wrap is an example of opaque materials.

The empty water bottle will fall faster than the full water bottle because of gravity pulls.

Down is always the same direction in every places on the Earth.

The unit of the force was named after the scientist Dr. John Nigh.

The friction always against the movement.

Forces can changes objects' motions.

Gravity makes things have weight.

Heavier objects have more friction.

Down is always towards the centre of the Earth.

If your shoes have many bumpy pattern on the soles, you might fall over.

Friction can happen between two surfaces.

Gravity pushes aeroplanes upwards.

Magnets can attract wood and glass.

Magnets can attract or repel magnetic materials.

Metals such as iron, nickel, cobalt are attracted to magnets.

A compass uses a small magnet to point south.

Planet Earth has its own magnetic field.

Magnets can be made in almost any shape or size.

Magnetic fields cannot work through other materials, such as paper.

Magnets can be found in many household items such as fridges and electric toothbrushes.

Opposite poles of magnets will always attract each other.

The Moon does not have gravity.

The Moon rises in the east and sets in the west.

The time it takes the Earth to completely revolve around the Sun is one year.

The time it takes the Earth to make a complete rotation on its axis is one week.

The Earth spinning on its axis is called rotation.

The Moon takes 24 hours to orbit the Earth.

The Sun is made up of rocks.

The moon is not visible in the night sky during new moon phase.

When the light side of the Moon is getting bigger, we can say the Moon is waxing.

When the light side of the Moon is getting bigger, we can say the Moon is waning.

The phases of the Moon are always the same in the northern and southern hemispheres.

The different shapes of the Moon are called phases.

When the Moon is closer to the Sun than the Earth, we can see crescent moon.

If we see only a little dark side of the Moon, it is called a gibbous moon.

We can see first quarter moon when the Moon is the same distance away from the Sun as the Earth.

Isaac Newton was the first person to walk on the Moon in 1969.

The shape of the Moon's orbit around the Earth is oval-shaped.

A rocket can use the Earth's gravity to go faster and so it can get to the Moon.

The Moon's gravity is the strongest one when it is compared to the Sun and the Earth.

The Moon's surface is rough because of craters.