حل مراجعة Practice Questions - الفصل الثالث في العلوم باللغة الإنجليزية للصف الثامن انسبير (2)

Grade 8 General Inspire Science Term 3 EOT Practice Questions Question 1a

Write down the relationship between amplitude (A) of a wave and its energy (E)?

A) Energy = Amplitude B) Energy = Amplitude2 C) Energy = 2 × Amplitude D) Energy = Amplitude ÷ 2

Question 1b The table below shows the amplitude of 3 waves X, Y and Z.

Determine the missing values of the energy of the waves.

A) W = 1 unit, X = 4 units, Y = 25 units B) W = 1 unit, X = 2 units, Y = 5 units C) W = 2 unit, X = 4 units, Y = 10 units D) W = 25 unit, X = 4 units, Y = 1 units

Question 1c

The table below shows the energy of 3 waves X, Y and Z.

Determine the missing values of the amplitude of the waves.

W = 1 unit, X = 36 units, Y = 64 units.

A) W = 1 unit, X = 6 units, Y = 8 units. B) W = 1 unit, X = 18 units, Y = 32 units. C) W = 8 unit, X = 6 units, Y = 1 units.

Question 2a

A) 4 HZ B) 25 HZ C) 0.25 HZ D) 0.5 HZ

Question 2b

E) 8 HZ F) 40 HZ G) 0.25 HZ H) 0.125 HZ

Question 2c

I) 12 HZ J) 0.083 HZ K) 0.41 HZ L) 0.16 HZ

Question 3

Which animal on the chart can hear the highest frequencies?

A. horse B. dolphin C. dog D. blue whale

Pitch is the perception of:

A. color B. loudness C. how high or low a sound seems D. vibration speed

What does pitch depend on? A. Color B. Frequency C. Temperature D. Light

A higher frequency produces: A. lower pitch B. higher pitch C. no sound D. slower waves

Sounds above the human hearing range are called: A. echo B. ultrasound C. vibration D. thunder

Question 4a

Determine the amplitude of the wave shown in the image below.

A) 16 cm B) 2 cm C) 8 cm D) 4 cm

Question 4b، Question 5a

What is true about sound? A. Sound travels at the same speed in all materials B. Sound travels only in gases C. Sound travels at different speeds in different media D. Sound does not need a medium Which statement is NOT true about sound? A. Sound needs a medium to travel B. Sound travels at different speeds in different media C. Sound travels faster in solids than in gases D. Sound can travel in a vacuum

Question 5b

In which of the following, solid, liquid or gas, does sound travel the fastest?

A) Gas B) Liquid C) Solid D) Vacuum

Question 5c

In which of the following, solid, liquid or gas, does sound travel the slowest?

A) Solid B) Liquid C) Gas D) Metal

Question 5d

In which of the following, air, water or iron, does sound travel the

slowest?

A) Iron B) Water C) Air D) Diamond

Question 5e

In which of the following, air, water or iron, does sound travel the fastest?

A) Air B) Water C) Iron D) Plastic

Question 6a

What is the light ?

A) electromagnetic radiation B) electric waves C) electromagnetic convection D) electric conduction

What is the energy carried by electromagnetic waves called?

A. Thermal energy B. Kinetic energy C. Radiant energy D. Chemical energy