During every waking and sleeping moment of our lives, we are

bombarded with

During every waking and sleeping moment of our lives, we are

bombarded with

of energy.of energy.

Most energy waves

collide with us or pass

right through us without any

notice on our part.

Most energy waves

collide with us or pass

right through us without any

notice on our part.

Waves carry energy, but not matter; however,

Waves carry energy, but not matter; however, matter can

be used to transfer energy.

matter can be used to

transfer energy.

The matter used to transport the

wave is a medium.

The matter used to transport the

wave is a medium.

What is the

medium?

What is the

medium?

Waves that use matter to transfer

energy are mechanical wavesmechanical waves.

Waves that use matter to transfer

energy are mechanical wavesmechanical waves.

What is the

medium?

What is the

medium?

What is the

medium?

What is the

medium?

In the 15th century, Leonardo da Vinci

observed that while waves move, the medium (water)

does not, “like the waves made in a

field of grain by the wind, where we see the waves running

across the field while the grain

remains in place.”

In the 15th century, Leonardo da Vinci

observed that while waves move, the medium (water)

does not, “like the waves made in a

field of grain by the wind, where we see the waves running

across the field while the grain

remains in place.”

Water,sound, and earthquake waves are

examples of mechanical waves.

Water,sound, and earthquake waves are

examples of mechanical waves.

Mechanical waves can be classified according to the

direction of the motion of matter in relation to the direction of

wave motion.

Mechanical waves can be classified according to the

direction of the motion of matter in relation to the direction of

wave motion.

Mechanical waves in which matter moves at right angles compared to the direction of

wave movement are transverse waves.

Mechanical waves in which matter moves at right angles compared to the direction of

wave movement are transverse waves.

Click here to see transverse

waves in action!

Types of Mechanical Waves• Transverse:

– A wave that causes the medium to vibrate at right angles to the direction of the wave

Mechanical waves in which medium matter moves forward

and backward in the same direction the wave travels are longitudinal or compressional

waves.

Mechanical waves in which medium matter moves forward

and backward in the same direction the wave travels are longitudinal or compressional

waves.Click here to see compressional

waves in action!

Longitudinal• Vibrates parallel to (in the same direction of) wave

travel – sound waves

Waves that do not require matter to

transfer energy are electromagnetic electromagnetic

waveswaves.

Waves that do not require matter to

transfer energy are electromagnetic electromagnetic

waveswaves.

Electromagnetic waves can travel

through a medium, but they can also travel in space or

through a vacuum.

Electromagnetic waves can travel

through a medium, but they can also travel in space or

through a vacuum.

Radio waves, X-rays, microwaves, and visible light

waves are examples of electromagnetic

waves.

Radio waves, X-rays, microwaves, and visible light

waves are examples of electromagnetic

waves.They can all

travel through empty space and they all travel at the same speed.

This speed is sometimes

called The Speed of

Light.

They can all travel through

empty space and they all travel at the same speed.

This speed is sometimes

called The Speed of

Light.

Review the information on waves by filling in the

concept map.

Review the information on waves by filling in the

concept map.

do not move or carry

include examples such as

transfer energy through

matter called a

________

includes

transfer or carry

can be classified into two categories

move move

to transfer

do not require

include examples such as

are further classified into

are a special type of