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High school science heat transfer

high school science heat transfer Animals do this when the weather is cold.




The Different Types Of Heat Transfer

There are three main types of heat transfer. They are conduction, convection, and radiation. The first kind (conduction) occurs when two objects of different temperature are placed in direct contact with each other. When this happens, heat energy moves out of the warmer object and into the cooler object. This occurs until both objects are at the same temperature. The figure below illustrates this.



The second type of heat transfer is convection. It occurs when a fluid physically moves into an area of different temperature and then heats this area up, or cools it down, as a result.

high school science heat transfer Homeschool High School Science Curriculum | Time4Learning

high school science heat transfer

The thick covering of fur also does a good job of keeping it warm.




A heat exchanger has the opposite purpose to that of insulation. It is a device used to enable the transfer of heat energy from one place to another, whereas insulation is used to reduce the transfer of heat energy from one place to another. An automobile radiator, shown in the first picture, is an example of a heat exchanger. It is used to remove heat from the engine and transfer it to the atmosphere. This prevents the engine from overheating. Heat exchangers use many fins to increase the rate of heat transfer. Fins increase the rate of heat transfer by increasing the surface area from which heat transfer occurs.

Learning Goals

*Students will understand the concept of heat transfer.
*Students will recognize that differ substances transfer heat at a different rate.

Context for Use

This lab can be modified so it takes an entire class period or ten to fifteen minutes. The equipment needed includes: heat source (hot plate or burner), Styrofoam cup, beaker, thermometer, and metal samples. The students should know what "specific heat" is, although this lab can be used as an introduction to the concept. Basic math/algebra skills are necessary. It is very easily adaptable.

Subject: Chemistry:General Chemistry:Thermodynamics:Heat
Resource Type: Activities:Lab Activity
Grade Level: High School (9-12)

Description and Teaching Materials

*This activity may be modified so students determine the identity of an unknown metal instead of the heat gained by the water.
Two common low cost materials you can experiment with are sawdust and leaves. Years ago I did an experiment with leaves and found that it's a surprisingly good insulator. What I did was get a bag of ice and placed it inside a garbage bag full of leaves (shown below). I fully immersed the bag inside the leaves and then I timed how long it took for the bag of ice to melt completely. It took several days, which shows just how effective leaves are as an insulator. The thing that makes leaves such a good insulator is the air that gets trapped in between the leaves. Air is a good insulator when it gets trapped in small areas, which is why it greatly enhances the insulation ability of leaves.



The third type of heat transfer is radiation. It occurs when heat energy is gained or lost by way of electromagnetic radiation. The best example of this is the sun, shown below. The electromagnetic radiation from the hot sun reaches the cooler earth and heats it up as a result. When the sun goes behind a cloud this radiation is mostly blocked and the sun is not able to heat the earth as much.



Source: Wikimedia via Lykaestria

Electromagnetic radiation can also result in cooling. For example, on a clear night with no clouds, a warm object placed outdoors will lose its heat energy to the night sky which is at a much lower temperature than the object.

Comments

  1. Modosoden

    Shouldn"t take more than 4 yrs to finish high school anyway

  2. Rezirolodokab

    Alexis Gerhard Wober, summa cum laude Littlefield High School

  3. Zunosehovepuk

    Why these high school kids look older than me

  4. Lunorecoto

    Also, the friendships you make in High School it"s actually temporary to be honest. It"s like, everybody"s a fake and wants to be a clone--

  5. Poqufiv

    Two Teen Girls From New Jersey High School Critically Hurt In Times Square Crash, Officials Say

  6. Tepezalozom

    High school graduation for Michael and his close friends, along with his girlfriend Sophia.

  7. Jotarefedefot

    Jesus, I haven"t smelled desperation like this since the week leading up to my highschool prom. Lemmie on the steam! I need it!

  8. Pisedep

    Never imagined myself ending High School without Dayla

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