Science - Unit P Days 12-13 (light, heat, and sound)

Science - Light, Heat, and Sound Energy

​SC.5.P.10.1: Investigate and describe some basic forms of energy, including light, heat, sound, electrical, chemical, and mechanical. SC.5.P.10.2: Investigate and explain that energy has the ability to cause motion or create change. SC.5.P.10.4: Investigate and explain that electrical energy can be transformed into heat, light, and sound energy, as well as the energy of motion.

​Energy is the ability to cause motion or create change. Some changes caused by energy are physical changes such as ice melting. Some changes are chemical changes such as wood burning. Some changes are changes in motion, such as starts, stops, changes in direction, and changes in speed.

Multiple Choice

A student mixes yellow powder with water. Which observation would prove a CHEMICAL change occurred?

• The powder DISSOLVED in the water

• The water turned the COLOR yellow

• The bag's TEMPERATURE changed

• The STATE OF MATTER changed

Multiple Choice

What kind of change occurs if matter changes in amount, size, or shape?

• substance change

• chemical change

• physical change

• elemental change

Multiple Choice

Which of the following options provides evidence of a CHEMICAL change?

• Wood is burned releasing ash and smoke

• Rocks separate when soil is sifted

• Boiling water bubbles when heated

• Salt dissolves in water

Multiple Choice

An example of a physical property is...

• Density

• Rust

• Atoms

• Elements

Multiple Choice

A white tablet is dropped into water. The water becomes cloudy and bubbles are produced. What type of change has occurred?

• Physical change

• Chemical change

• No change

Multiple Choice

Which observations prove a chemical change occurred

• Dissolving and expected color change

• Mixing and dissolving

• State of matter change and boiling water bubbles

• Unexpected color change and temperature change

​There are some basic forms of energy that you should now be very familiar with. Those basic forms of energy are:

​GET YOUR NOTEBOOKS OUT!!

I. light: radiant energy that we can see (visible)

o light travels in a straight line

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o light can reflect: BOUNCE​​

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o light can refract: BEND

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o light can be absorbed: SOAKED UP​

Multiple Choice

The following diagram shows the ray diagram when a torch light is torched towards a mirror. Which of the following is the correct reflected ray?

Multiple Choice

What is the conclusion from your observation in this picture?

• Light travels in a straight line

• Light can be refracted

• Light can be reflected

• Light can pass through a transparent material

Multiple Select

Which of the following shows that light travels in a straight line? Tick the correct answers.

• A

• B

• C

• D

• E

Multiple Select

Which of the following shows the principle of light refraction? Tick the correct answers.

• A

• B

• D

• E

• F

Multiple Select

Which of the following shows the principle of light reflection? Tick the correct answers.

• A

• B

• D

• E

• F

II.​ Heat: the thermal energy of an object or material

o is measured as temperature

o measured in degrees Fahrenheit F or Celsius C

o moves from warmer objects to cooler objects

o conductors move heat well

o insulators do not move heat well

Multiple Choice

___________________ are materials that ALLOW heat and electricity to move easily through them.

• Conductors

• Insulators

Multiple Choice

What tool do we use to measure temperature?

• Thermometer
• Ruler
• Balance
• Magnifying Glass

Multiple Choice

Which thermometers temperature is about 25° Celcius?

• Red

• green

• blue

• blue and red

Multiple Choice

What are the two scales used to measure temperature?

• Bathroom and Kitchen Scales

• Degrees and Heat

• Hot and Cold

• Celsius and Fahrenheit

Multiple Choice

Thermal energy travels ...

• outside to inside.

• cold to hot.

• hot to cold.

• inside to outside.

Multiple Choice

Thermal energy is NOT able to travel quickly through this type of material.

• Insulator

• Conductor

​III. sound: caused by vibrations in the air​

o vibrations are heard by the ear as sound

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o pitch is how high or low a sound is

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o volume is how loud or soft a sound is

Multiple Choice

How is sound produced?

• By the vibration of particles

• By the transfer of particles 

Multiple Choice

Measure of how high or low a sound is

• amplitude

• compression

• speed of sound

• pitch

Multiple Choice

High pitches are produced by objects vibrating _______________.

• quickly
• slowly

Multiple Choice

How loud or soft the sound is

• pitch

• acoustics

• wavelength

• volume

Multiple Choice

The more_______ a sound has, the greater its _________ is. 

• pitch, volume
• energy, sound
• frequency, vibration
• energy, volume

Multiple Choice

Sound travels through the air as waves.

• True
• False

Multiple Choice

A group of students are listening to music on a laptop while they work. One of the students observes that the battery charge is getting low, and suggests they turn the music off. The most likely reason for this is that

• electrical energy from the battery is being transformed into sound energy

• the sound coming from the speakers actually has nothing to with the battery

• sound is caused by vibration

• volume is how loud a sound is, and pitch is how high or low a sound is