Year 8 cycle 1 Science KA

Idenitfy the cortrect defintion of the term amplitude.

• The number of oscillations per unit time
• The speed of a wave in a given medium
• The distance between the crest and trough of a wave
• The maximum distance a particle oscillates

Tags

NGSS.MS-PS4-1

Define the term wavelength.

• The height of a wave
• The speed of a wave
• The color of a wave
• Distance between successive crests of a wave

Tags

NGSS.HS-PS4-1

Describe how sound waves are produced.

• By the reflection of light
• By waves travelling through air particles

• By the vibration of an object
• By the rotation of the Earth

Identify which is the correct speed for a light wave, measured in metres per second.

• 300,000,000

• 1,000,000,000
• 500,000,000
• 100,000,000

Tags

NGSS.HS-PS4-1

Add the correct labels to complete the ray diagram.

c

d

e

Absorbed ray

Refracted ray

Incident ray

Normal line

Reflected ray

Tags

NGSS.MS-PS4-2

A wave with a frequency of 50 Hz has a wavelength of 3.5 m. Calculate the wave speed and type your working out into the calculator.

Use the equation:

wave speed = frequency x wavelength

Mathematical Equivalence

ON

When light crosses the (a)   between a less ​ (b)   medium and a more ​ (c)   medium, the speed of the ray ​ (d)   . This causes the light to ​ (e)   and change direction.

• Interface
• decreases
• dense
• refract
• reflect
• increases
• membrane

Tags

NGSS.MS-PS4-2

Organize the waves into the right categories

Groups:

(a) Mechanical waves

,

(b) Electromagnetic waves

• Water

• X-rays

• Gamma rays

• Sound

• Radio waves

• Seismic (earthquake) waves

• Visible light

• Infrared waves

Tags

NGSS.MS-PS4-1

For transverse waves, the direction of energy trasfer is (a)   to the oscillation of the particles. An example of a transverse wave is a ​ (b)   wave.

For longitudinale waves, the direction of energy transfer is ​ (c)   to the oscillation of the particles. An example of a longitudinal wave is a ​ (d)   wave.

• perpendicular
• parallel
• Light
• sound

Tags

NGSS.MS-PS4-1

Add the labels to the wave diagram.

a

b

c

d

Trough

Amplitude

Peak

Wavelength

Tags

NGSS.MS-PS4-1