Grade 10 Physical Sciences Term 1

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Questions and Answers

The frequency of a wave is defined as the ...

number of complete waves per second. (correct)

number of points in phase in a wavelength.

lowest point on a wave.

time taken for one complete wave.

When two wave crests overlap, the increase in amplitude is due to ...

two waves in phase.

constructive interference. (correct)

destructive interference.

cancellation.

Define the term amplitude of a wave.

The amplitude of a wave is the maximum displacement of a particle from its equilibrium position.

Write down the amplitude, in metres, of this wave.

0.5 m Signup and view all the answers

Determine the period of this wave.

8 seconds Signup and view all the answers

Calculate the speed of the wave if the wavelength is 0.8 m.

0.1 m/s Signup and view all the answers

Calculate the distance d on the diagram.

2 m Signup and view all the answers

How does the amplitude of the wave produced by source B compare to that of the wave produced by source A? Choose from GREATER THAN, SMALLER THAN or EQUAL TO.

GREATER THAN Signup and view all the answers

How does the frequency of the wave produced by source B compare to that of the wave produced by source A? Choose from GREATER THAN, SMALLER THAN or EQUAL TO.

GREATER THAN Signup and view all the answers

Calculate the frequency of the wave produced by source B.

0.25 Hz Signup and view all the answers

In which ONE of the following do sound waves travel the FASTEST?

Solids Signup and view all the answers

The amplitude of a sound wave is increased without changing the frequency. How does this change affect the loudness and pitch of the sound?

LOUDNESS: Increases, PITCH: Unchanged Signup and view all the answers

Define the term longitudinal wave.

A wave in which the particles of the medium vibrate parallel to the direction of motion of the wave. Signup and view all the answers

Calculate the distance between the sound source and the building.

1360 m Signup and view all the answers

Name the property of a sound wave that influences its pitch.

Frequency Signup and view all the answers

Above which frequency is a sound wave classified as ultrasound?

20 kHz Signup and view all the answers

Name ONE use of ultrasound in the medical treatment of patients.

Diagnosis of medical condition/pregnancy Signup and view all the answers

A rod acquires a negative charge after it has been rubbed with wool. Which ONE of the following best explains why this happens?

Negative charges are transferred from the wool to the rod. Signup and view all the answers

A rubber balloon obtains a negative charge after it has been rubbed against human hair. Which ONE of the statements below best explains why this happens?

Negative charges are transferred from the human hair to the rubber balloon. Signup and view all the answers

Write down the principle of conservation of charge in words.

In an isolated system the total/net charge remains constant. Signup and view all the answers

Give a reason why the stream of water bends towards the rod.

The water molecule has a positive charge and is attracted toward the rod. Signup and view all the answers

Calculate the net charge now carried by the rod.

1.6 x 10^-5 C Signup and view all the answers

Which sphere has an excess of electrons?

Sphere B Signup and view all the answers

The two spheres are allowed to touch. Will the electrons be transferred from A to B or B to A?

Sphere A to B Signup and view all the answers

Calculate the new charge on sphere B.

5 x 10^-7 C Signup and view all the answers

Calculate the number of electrons transferred during contact.

1.56 x 10^13 Signup and view all the answers

Study Notes

Physical Sciences Resource Pack and Marking Guidelines

This resource pack supports learning essential content and skills for Term 1, Grade 10.
It aims to help students grasp key concepts, meet required standards, and succeed in assessments.

Table of Contents (Page 2)

The document outlines topics and questions for Term 1 Physical Sciences.
Topics covered include Transverse Waves, Longitudinal Waves, Sound Waves, and Electrostatics, with corresponding questions.

Transverse Waves, Longitudinal Waves, and Sound Waves (Page 2)

Pulse: A single disturbance in a medium.
Transverse Pulse: A pulse where particles vibrate perpendicular to the pulse's direction.
Amplitude: Maximum displacement of a particle from its rest position.
Principle of Superposition: The sum of amplitudes of overlapping pulses.
Constructive Interference: Overlapping crests; resultant increase in amplitude.
Destructive Interference: Overlapping crest and trough; reduced amplitude.
Transverse Wave: A wave where particles vibrate at right angles to the wave's motion.
Wavelength: Distance between two successive points in phase.
Frequency: Number of wave pulses per second.
Period: Time taken for one complete wave pulse.

Wave Properties (Page 3)

Amplitude: Maximum displacement of a particle from equilibrium position.
Crest: Highest point on a wave.
Trough: Lowest point on a wave.
Wave Speed: Distance travelled by a point on a wave per unit time.
Longitudinal Wave: A wave where particles vibrate parallel to the wave's motion.

General Wave Properties (Page 5)

Transverse waves: Vibrations perpendicular to wave direction; examples include water and light waves.
Longitudinal waves: Vibrations parallel to wave direction; example is sound waves.
Wavefronts: Imaginary lines connecting adjacent points in phase.
Key properties of waves: carry energy, obey reflection and refraction, and obey wave equation V=fλ.

Question 1 (Page 6)

Frequency: Number of complete waves per second.
Constructive interference: Overlapping crests results in an increase in amplitude.
Amplitude definition: Maximum displacement of a particle from its rest position.

Question 2 (Page 7)

Sound wave speed: Fastest in solids, then liquids, then air.
Loudness: Increased amplitude correlates to increased loudness.
Pitch: Frequency influences pitch.

Question 3 (Page 8/13)

Longitudinal wave definition: A wave where particles vibrate in the same direction as the wave travels.
Calculation of distance: Speed = Distance / Time, and the distance can be calculated using this formula.
Ultrasound frequencies and uses: Frequencies above a certain threshold are classified as ultrasound; uses in medical treatment may be mentioned.
Electrostatics: Study of charges at rest.
Types of charge: Negative (excess electrons) and Positive (electron deficient).
Charging methods: Contact and Rubbing (triboelectric).
Electrostatic forces: Like charges repel, unlike charges attract.
Conservation of charge: Charge can't be created nor destroyed; it can only be transferred.
Charge quantization: Charges are multiples of the elementary charge.
Questions about charging of objects: Determining cause of negative charge on a rod or balloon.

Marking Memoranda (Pages 9-15)

Contains detailed solutions, formulas, and marking criteria for the questions in the document.

Summary of Electrostatics concepts (pages 12-15)

Terminology:
- Electron, Elementary Charge, Neutron, Proton
- Polarization, Quantization, Conservation of Charge
- Triboelectric Effect
Answers/solutions for various questions (on electrostatic):
- Defining terms, reasons behind specific charged items (e.g., rod, balloon), calculating charges and number of electrons.

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Description

This quiz resource pack is designed for Grade 10 students focusing on Term 1 Physical Sciences. It includes essential content covering topics such as Transverse Waves, Longitudinal Waves, Sound Waves, and Electrostatics, alongside marking guidelines to aid in assessments. Master key concepts and excel in your studies this term!