Gr 10 Physical Sciences Ch 8: Speed of sound

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What is a factor to consider when using a stopwatch?

Weather conditions (correct)

Color of the stopwatch

Type of stopwatch used

Length of the measuring tape

What is an echo?

A reflected light wave

A type of earthquake

A reflected sound wave (correct)

A type of ocean wave

What is used to determine ocean depth?

Sonar technology (correct)

GPS technology

Laser technology

Radar technology

How do dolphins navigate?

Using echolocation Signup and view all the answers

What is measured to calculate the distance to the seabed using SONAR?

The time lapse between sending and receiving the sound Signup and view all the answers

What is the primary factor that determines the speed of sound in a medium?

Density of particles Signup and view all the answers

In which state of matter does sound travel the fastest?

Solids Signup and view all the answers

What is the approximate speed of sound in air at sea level and 21°C under normal atmospheric conditions?

344 m/s Signup and view all the answers

What is the effect of higher temperatures on the speed of sound?

It increases the speed of sound Signup and view all the answers

What is the purpose of the starter's gun in the informal experiment to measure the speed of sound?

To produce a loud sound Signup and view all the answers

What is the formula used to calculate the speed of sound in the informal experiment?

v = D/t Signup and view all the answers

Why is air pressure a factor affecting the speed of sound?

It increases the speed of sound Signup and view all the answers

What is the correct order of speed of sound from fastest to slowest in different media?

Solids, liquids, gases Signup and view all the answers

What is the main reason sound travels faster in solids than in gases?

Solids have denser particles Signup and view all the answers

What is the purpose of repeating the experiment in the informal measurement of the speed of sound?

To reduce human error and increase accuracy Signup and view all the answers

Why does sound travel faster in sea water than in air at the same temperature?

Sea water is denser than air Signup and view all the answers

What is the relationship between the speed of sound and temperature in a gas?

Speed of sound increases with increasing temperature Signup and view all the answers

What is the significance of choosing a location with a known straight-line distance in the informal experiment?

To ensure accurate measurement of the distance Signup and view all the answers

Why does air pressure affect the speed of sound?

Higher pressure increases the density of air Signup and view all the answers

What happens when sound waves collide with an object?

They reflect off the object Signup and view all the answers

What is the role of the person at the other point in the informal experiment?

To start and stop the stopwatch Signup and view all the answers

What is the formula used to calculate the speed of sound in the informal experiment?

v = D/t Signup and view all the answers

Why is reaction time an important factor to consider when using a stopwatch?

It affects the accuracy of the measurement Signup and view all the answers

What is the purpose of echolocation in animals like dolphins and bats?

To form a picture of their surroundings Signup and view all the answers

What is the principle behind SONAR technology?

Measuring the reflection of sound waves Signup and view all the answers

What is the relationship between the time lapse and the distance to the seabed in SONAR?

The time lapse is directly proportional to the distance Signup and view all the answers

What is the primary reason echoes are more noticeable in large open spaces?

There are fewer obstacles to absorb or deflect the sound waves. Signup and view all the answers

How do animals like dolphins and bats use echolocation to form a 'picture' of their surroundings?

By emitting sound waves and measuring the time lapse between sending and receiving the reflected sound. Signup and view all the answers

What is the underlying principle behind the ability of SONAR to determine ocean depth?

The time lapse between sending and receiving the sound wave is directly proportional to the distance to the seabed. Signup and view all the answers

Why are echoes typically heard after the original sound?

Because the reflected sound wave takes longer to reach our ears. Signup and view all the answers

What is the significance of considering weather conditions when measuring the speed of sound?

Temperature and humidity affect the speed of sound in air. Signup and view all the answers

Which of the following substances has the highest density, considering the speed of sound values provided?

Aluminium Signup and view all the answers

What would be the most significant error in the informal experiment to measure the speed of sound?

Inaccurate measurement of the distance Signup and view all the answers

If the air pressure at sea level increases, what would be the expected effect on the speed of sound?

It would increase Signup and view all the answers

What would be the primary reason for the difference in speed of sound between sea water and air at the same temperature?

Difference in density Signup and view all the answers

What is the underlying reason for the increase in the speed of sound with an increase in temperature?

Increase in particle kinetic energy Signup and view all the answers

What would be the most significant limitation of the informal experiment to measure the speed of sound?

Human reaction time Signup and view all the answers

Which of the following statements about the speed of sound is false?

It is independent of temperature Signup and view all the answers

What would be the expected effect on the speed of sound if the distance between the points in the informal experiment were increased?

It would remain the same Signup and view all the answers

What is the primary function of echolocation in animals like dolphins and bats?

To navigate and form a 'picture' of their surroundings Signup and view all the answers

What happens when sound waves collide with an object in a large open space?

The sound waves reflect off the object, producing an echo Signup and view all the answers

What is the principle behind SONAR technology used by ships to determine ocean depth?

Measuring the time lapse between sending and receiving sound waves Signup and view all the answers

Why are echoes typically more noticeable in large open spaces?

Because there are fewer obstacles to absorb the sound waves Signup and view all the answers

What is a factor that can affect the accuracy of measurement when using a stopwatch?

Reaction time Signup and view all the answers

Gr 10 Physical Sciences Ch 8: Speed of sound

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Questions and Answers

What is a factor to consider when using a stopwatch?

What is an echo?

What is used to determine ocean depth?

How do dolphins navigate?

What is measured to calculate the distance to the seabed using SONAR?

What is the primary factor that determines the speed of sound in a medium?

In which state of matter does sound travel the fastest?

What is the approximate speed of sound in air at sea level and 21°C under normal atmospheric conditions?

What is the effect of higher temperatures on the speed of sound?

What is the purpose of the starter's gun in the informal experiment to measure the speed of sound?

What is the formula used to calculate the speed of sound in the informal experiment?

Why is air pressure a factor affecting the speed of sound?

What is the correct order of speed of sound from fastest to slowest in different media?

What is the main reason sound travels faster in solids than in gases?

What is the purpose of repeating the experiment in the informal measurement of the speed of sound?

Why does sound travel faster in sea water than in air at the same temperature?

What is the relationship between the speed of sound and temperature in a gas?

What is the significance of choosing a location with a known straight-line distance in the informal experiment?

Why does air pressure affect the speed of sound?

What happens when sound waves collide with an object?

What is the role of the person at the other point in the informal experiment?

What is the formula used to calculate the speed of sound in the informal experiment?

Why is reaction time an important factor to consider when using a stopwatch?

What is the purpose of echolocation in animals like dolphins and bats?

What is the principle behind SONAR technology?

What is the relationship between the time lapse and the distance to the seabed in SONAR?

What is the primary reason echoes are more noticeable in large open spaces?

How do animals like dolphins and bats use echolocation to form a 'picture' of their surroundings?

What is the underlying principle behind the ability of SONAR to determine ocean depth?

Why are echoes typically heard after the original sound?

What is the significance of considering weather conditions when measuring the speed of sound?

Which of the following substances has the highest density, considering the speed of sound values provided?

What would be the most significant error in the informal experiment to measure the speed of sound?

If the air pressure at sea level increases, what would be the expected effect on the speed of sound?

What would be the primary reason for the difference in speed of sound between sea water and air at the same temperature?

What is the underlying reason for the increase in the speed of sound with an increase in temperature?

What would be the most significant limitation of the informal experiment to measure the speed of sound?

Which of the following statements about the speed of sound is false?

What would be the expected effect on the speed of sound if the distance between the points in the informal experiment were increased?

What is the primary function of echolocation in animals like dolphins and bats?

What happens when sound waves collide with an object in a large open space?

What is the principle behind SONAR technology used by ships to determine ocean depth?

Why are echoes typically more noticeable in large open spaces?

What is a factor that can affect the accuracy of measurement when using a stopwatch?

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Gr 10 Fisiese Wetenskappe Hfst 8 Opsomming: Klank