Chapter 10 Test Review

Label each statement as either True or False. 1. Light is an electromagnetic wave that can be seen.

• True

• False

Answer explanation

True. Light is indeed an electromagnetic wave, and the visible spectrum of light is the part that can be seen by the human eye.

Tags

NGSS.MS-PS4-2

NGSS.MS-PS4-1

Label each statement as either True or False. 2. Light waves travel more slowly than sound waves do.

• True

• False

Answer explanation

The statement is False because light waves travel faster than sound waves. In a vacuum, light travels at approximately 299,792 kilometers per second, while sound travels at about 343 meters per second in air.

Label each statement as either True or False. 3. Light generally travels in a straight line.

• True

• False

Answer explanation

The statement is True because light typically travels in straight lines in a uniform medium. This principle is fundamental in optics and is observed in everyday phenomena.

Label each statement as either True or False. 4. Light always travels at the same speed in all mediums.

• True

• False

Answer explanation

The statement is False because light travels at different speeds in different mediums. For example, it travels slower in water than in air or vacuum.

Tags

NGSS.MS-PS4-2

NGSS.MS-PS4-1

Label each statement as either True or False. 5. Radar and cellular phones use microwaves.

• True

• False

Answer explanation

The statement is True because both radar systems and cellular phones operate using microwaves, which are a type of electromagnetic radiation. This allows them to transmit and receive signals effectively.

Tags

NGSS.MS-PS4-2

Label each statement as either True or False. 6. Concave mirrors have a flat surface.

• True

• False

Answer explanation

The statement is False because concave mirrors have a curved inward surface, not a flat surface. They are designed to focus light, unlike flat surfaces which do not converge light rays.

Label each statement as either True or False. 7. Light that bounces off a smooth surface goes in many directions.

• True

• False

Answer explanation

The statement is False because light that bounces off a smooth surface reflects in a single direction, not many. This is known as specular reflection, unlike rough surfaces that scatter light in multiple directions.

Tags

NGSS.MS-PS4-2

Waves that move perpendicular to the way that the matter is moving are called _____ waves.

• longitudinal

• sound

• spectrum

• transverse

Answer explanation

Waves that move perpendicular to the direction of matter movement are called transverse waves. In these waves, the oscillation occurs at right angles to the wave's direction, unlike longitudinal waves where the movement is parallel.

Tags

NGSS.MS-PS4-1

The number of waves that pass a certain point in one second is called the _____ of that wave.

• wavelength

• amplitude

• frequency

• speed

Answer explanation

The number of waves that pass a point in one second is known as the frequency of the wave. Wavelength refers to the distance between waves, amplitude is the height of the wave, and speed is how fast the wave travels.

The distance that one wave travels in one second is called the _____ of that wave.

• wavelength

• amplitude

• frequency

• speed

Answer explanation

The distance that one wave travels in one second is known as the speed of the wave. Wavelength refers to the distance between waves, amplitude is the height of the wave, and frequency is the number of waves per second.