Educational: Mathematics, science and technology, general

Did you know that gases have no size or shape?

Did you know that the northern lights are made when energy from the Sun hits gases around Earth?

Did you know that Mars is nicknamed the "e;red planet"e;?

id you know that most of Earth is covered in water?

Your body goes through a cycle of five different stages when you sleep.

When you want to move, your brain sends a signal down your spinal cord.

Most humans only weigh a few pounds when they are born.

When you eat food, the muscles in your throat push it down a tube called the esophagus.

Nerve endings in your skin help you tell what something feels like.

Taste buds in your mouth tell your brain what flavor a food has.

Every smell you sense is made from tiny molecules floating in the air.

The center of your eye is known as the pupil.

Sound waves are a type of vibration in the air.

Do-It-Yourself Experiments introduces readers to the scientific process.

Do-It-Yourself Experiments introduces readers to the scientific process.

Do-It-Yourself Experiments introduces readers to the scientific process.

Do-It-Yourself Experiments introduces readers to the scientific process.

Do-It-Yourself Experiments introduces readers to the scientific process.

Do-It-Yourself Experiments introduces readers to the scientific process.

Do-It-Yourself Experiments introduces readers to the scientific process.

Did you know that teeth come in many different shapes?

Did you know that stomach muscles are involuntary muscles?

Did you know the nose is part of the respiratory system?

Did you know that there are more than 600 muscles in your body?

Did you know that the left lung is smaller than the right lung?

Did you know that the heart is a muscle in the circulatory system?

Did you know that your eyes will continue to grow until you are a teenager?

Did you know that ears are a part of the auditory system?

Did you know that the brain is the third largest organ in the body?

Did you know that bones keep the organs inside our bodies safe?

Time is the passage of seconds, minutes, hours, days, months, and years.

Almost everything in our world is made of shapes.

We use patterns to recognize all kinds of things in our world.

We can measure almost everything.

A graph is a way of keeping track when we sort and count things.

If you want to know exactly how many of something there are, you can count them.

A sphere has no corners or edges.

The sides of a pyramid are made out of matching triangles.

A cylinder is made up of both flat and curved surfaces.

The shape of a prism's base determines how many sides it has.

Each cube has six identical faces.

The flat bottom of a cone is called a base.

Drawing on real-world examples, Let’s Do Math!

Drawing on real-world examples, Let’s Do Math!

Drawing on real-world examples, Let’s Do Math!

Weight is how heavy something or someone is.

Volume is the amount of space taken up by something.

The first thermometers were very different from the ones used today.

Busy people need to keep track of time.

A calendar can help people to count how long it is until their birthday.