Sound, Light, and Heat and Temperature

Sound, Light, and Heat and Temperature

by Mae Tagarao

Science 8, Quarter 1, Week 4a

EFFECT OF TEMPERATURE TO SPEED OF SOUND

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Most Essential Learning Competency

Investigate the effect of temperature to the speed of sound. (MELC Week4)

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Learning Objectives:

The learners shall be able to:

1. determine the effect of temperature on the speed of sound;

2. describe the relationship between temperature and the speed of sound; and

3. calculate the speed of sound.

Multiple Choice

Potential energy is the energy possessed by the body due its

position and mass.

• TRUE

• FALSE

Multiple Choice

The general unit of energy is Joule.

• TRUE

• FALSE

Multiple Choice

The amount of work done by a body depends on the amount of energy it possesses.

• TRUE

• FALSE

Multiple Choice

The kinetic energy of a body is its ability to do work because of its motion.

• TRUE

• FALSE

Multiple Choice

Potential energy can be transformed to kinetic energy, and vice versa.

• TRUE

• FALSE

Multiple Choice

Sound travels fastest in gas than in solid and liquid.

• TRUE

• FALSE

Multiple Choice

The sound is a longitudinal wave that is affected by the

temperature.

• TRUE

• FALSE

Multiple Choice

The sound is audible at daytime because the direction of wave

fronts is towards the ground.

• TRUE

• FALSE

Multiple Choice

The movement of a particle in a medium does not affect the sound.

• TRUE

• FALSE

Multiple Choice

The speed of sound is fast when the temperature in the

environment is high compared when its low.

• TRUE

• FALSE

Fill in the Blank

What is the speed of sound at 20°C?

Fill in the Blank

What is the speed of sound in the air with 39°C temperature?

Science 8, Quarter 1, Week 4b

COLORS OF LIGHT

Most Essential Learning Competency

Explain the hierarchy of colors in relation to the energy of visible light. (S8FE-If-27)

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Learning Objectives:

The learners shall be able to:

1. infer that white light is made up of different colors of light;

2. demonstrate the existence of the color components of visible light using a spectrum; and

3. explain the hierarchy of colors in relation to energy, wavelengths and frequencies.

Fill in the Blank

Which color has the shortest wavelength?

Fill in the Blank

Which color has the longest wavelength?

Fill in the Blank

Which color has the lowest frequency?

Fill in the Blank

Which color has the highest frequency?

Fill in the Blank

Which color has the lowest energy?

Open Ended

Light is a magical experience, from when the sun rises to when the sun sets.

It is a wonderful world when we have light. Without light, you would not see anything at all. Light has many important purposes. Give practical applications of light and light phenomena in real-life situation. Write your 3- to 5-sentence answer on the space below. (5points)

Science 8, Quarter 1, Week 4c

HEAT AND TEMPERATURE

Most Essential Learning Competency

Differentiate between heat and temperature at the molecular level. (S8FE-Ig-29)

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Learning Objectives:

The learners shall be able to:

1. discuss the properties of heat and temperature at the molecular level;

2. describe the hotness or coldness of an object in terms of its temperature;

3. determine the relationship between the amount of heat transferred and the resulting temperature change.

Multiple Choice

Heat is the transfer of _____ from one object to another due to a difference in temperature.

• time

• energy

• force

• speed

Multiple Choice

Which of the following is a unit of measurement for heat?

• Joule

• Newton

• Celsius

• Fahrenheit

Multiple Choice

Calorie is also a unit of measure for heat.

• TRUE

• FALSE

Multiple Choice

Heat and temperature are the same thing.

• TRUE

• FALSE

Multiple Choice

Do substances tend to shrink or expand as they get hotter?

• THEY SHRINK

• THEY EXPAND

Multiple Choice

What happens to the molecules of a substance as it gets cooler?

• The molecules move faster.

• The molecules move slower.

• The molecules shrink.

• The molecules expand.

Multiple Choice

In what state of matter is the temperature the highest?

• SOLID

• LIQUID

• GAS

Multiple Choice

In what state of matter is the temperature of water the lowest?

• SOLID

• LIQUID

• GAS