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

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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.

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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