Theme : Electromagnetic Waves

December 1-5, 2014 Mrs. Marites de luna

Quick Questions : Monday

 1. The 3 ways of transferring heat are _________, ___________ and _____________.

 2. When you put a nail over a flame and you felt the heat afterwards, that is an example of ________ heat transfer.

 3. The heating system in our home is an example of _________ heat transfer.

 4. Boiling water is an example of _________ heat transfer.

 5. When water is exposed to sunlight and then heated, that is an example of ________ heat transfer.

QUICK QUESTIONS : WEDNESDAY  

1. In the EM spectrum, which has the longest wavelength?

2. In the EM spectrum, which has the highest frequency?

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3. In the EM spectrum, which is the most active / highest energy?

4. The 3 ways of transferring heat are ________, ________ and _________.

5. Boiling water is an example of _________ heat transfer.

QUICK QUESTIONS : THURSDAY 

1. Give an example of an insulator.

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2. Give an example of a heat conductor.

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3. Any material that transfers or passes heat is called a ___________.

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4. Any material that keeps the heat is called _____________.

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5. Radio waves need a medium to travel unlike sound waves. (T/F)

Essential standards : 6.P.3.2

By the end of the week, I can : a. tell what electromagnetic waves are b. Explain the effects of electromagnetic waves on various materials ( to include absorption, scattering, and change in temperature.)

Important links for the week of December 1-5  http://www.ck12.org/book/CK-12-Physical Science-For-Middle-School/r3/section/20.0/  http://www.discoveryeducation.com/?returnUrl=s cience.discoveryeducation.com%2Fconcept.cfm%3 FCID%3D42050cb5-2e13-4299-b025-787ed26150a0

Homework : For this week, focus on the following questions :  1. What is an electromagnetic wave?

 2. How do electromagnetic waves interact with/affect different types of matter?

 3. Defend the importance of gamma rays in treating cancer, even though many patients suffer serious side effects to such treatment.

 4. Be ready for a test on Friday, December 5 – topic will be HEAT TRANSFER.

REVIEW : CONDUCTION, CONVECTION AND RADIATION

Vocabulary Word : Monday Electromagnetic Radiation  Electromagnetic radiation is the transfer of energy by waves traveling through matter or across empty space.

 Sentence. The most important source of electromagnetic radiation on Earth is the sun.

New Concept : Monday

 Electromagnetic waves can have different wavelengths.  Some types of matter will absorb electromagnetic waves.

 Some types of matter will scatter electromagnetic waves.

 Electromagnetic waves can change the temperature of matter.

COOKING PROJECT!

SCIENCE LITERACY : READING VIA DISCOVERY ED –EM WAVES

Vocabulary Word : Wednesday Infrared  Electromagnetic energy that has a lower frequency than visible light and is beyond the color of red on the light spectrum: Infrared light is invisible to humans

New Concept : Wednesday

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Light and other electromagnetic waves can warm objects. How much an object's temperature increases depends on how intense the light striking its surface is, how long the light shines on the object, and how much of the light is absorbed. When light interacts with matter it is either absorbed, transmitted, refracted) and/or reflected (scattered). An example of scattering is when the sky is blue. The sun is a major source of energy for changes on the earth's surface. The sun loses energy by emitting light. A tiny fraction of the light reaches the earth, transferring energy from the sun to the earth.

Wednesday Activity : Conductors or insulators?

Melt that Ice! ICE CHALLENGE PART 2!

 Each group will be given a cup of ice.

  You are to use BUT choose which materials will melt the ice faster.

Measure the volume of your melted ice using the graduated cylinder.

   The more melted ice you have – the better!

Which materials contributed to the melting of your ice? Why? What type of materials are these?

Which materials do you think will not help in ice melting? Why?

Vocabulary Word : Wednesday Ultraviolet radiation  a type of electromagnetic radiation that has a higher frequency than violet light: Ultraviolet light is invisible to humans.

New Concept : Wednesday

 Visible spectrum is the portion of the electromagnetic spectrum that is visible to (can be detected by) human eyes. Electromagnetic radiation in this range of wavelengths is called visible light or simply light.  Infrared light has a longer wavelength than visible light and is detected most often by its heating effect. Infrared imaging has applications in space exploration and with satellite imaging.

New Concept : Thursday

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Ultraviolet light has shorter wavelengths than visible light. These wavelengths are responsible for causing our sunburns. Most of these waves are blocked from entering Earth's atmosphere by the ozone but some days, more ultraviolet waves get through our atmosphere. Scientists have developed a UV index to help people protect themselves from these harmful ultraviolet waves. These are the types of waves used in tanning beds.

Thursday Activity : Group Poster Making contest! EM Waves!

NCFE QUESTION :

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When electromagnetic waves strike a metal pipe, what usually happens?

 a. The pipe gets colder.

 b. The pipe absorbs some of the waves.

 c. The pipe reflects all of the waves.

 d. The pipe begins to produce light.