Convection and density

Slides:

Advertisements

Similar presentations

Moving in the right circles

Advertisements

3 Types of Heat Transfer.

What do we all have in common?. What is the opposite of a conductor? Name a poor conductor of heat? What makes bubble wrap a bad conductor and a good.

CONVECTION CURRENTS AND THE MANTLE

Convection and the Mantle

Convection CONVECTION.

Q What does this picture show and who is in the best position?

Convection Currents and the Mantle How is heat transferred? What causes convection currents?

Convection and the Mantle

Transferring Thermal Energy Chapter 9 Section 3a.

Section 2: Transferring Thermal Energy

Chapter 1 Section 2: Convection Currents and the Mantle

Heat Transfer. Heat is the transfer of thermal energy between substances that are at different temperatures.

Conduction, Convection, Radiation, oh my!!. Conduction –Involves objects in direct contact –2 objects in contact are at unequal temperature –Example:

UNDERSTANDING HEAT TRANSFER: CONDUCTION, CONVECTION AND RADIATION.

Moving Thermal Energy. CONDUCTION ► Is the transfer of energy through matter by direct contact of particles.

Conduction, Convection and Radiation. Radiation: heat transfer via radiant energy  Radiant energy is in the form of electromagnetic waves.

Convection. Learning objectives Demonstration We are going to do an experiment to see how heat (thermal energy) moves through a liquid. We will put potassium.

Energy Transfer In the Earth’s System (C) Copyright all rights reserved 1.

HEAT ENERGY AND ITS TRANSFER. 2. HEAT TRANSFER BY CONVECTION.

3.2 Convection In an electric oven, food is cooked using heating elements which heat the air around the food. An electric ovenExample 2 layer of mineral.

Conduction and Convection. What happens when cold (coloured) water is poured into hot clear water? A current will be created. Why is a current created?

Heat Energy Transfer GCSE Physics. Textbook reference CCEA Physics, Page 17 – 25 Key words list, what do you think the words and phrases mean? You don’t.

Chapter 7 Heat Transfer. Convection Currents and the Mantle What will we learn: 1.How is heat transferred? 2.What causes convection currents?

Heat Transfer Conduction, Convection, Radiation. Conduction Heat energy can be transferred from one substance to another when they are in direct contact.

Heat energy flows from warmer to cooler areas Lesson 1.3 You will learn: How heat is transferred in matter; How the process of conduction transfers heat;

Convection Currents. Let’s Start With Density High density: molecules close together in a certain volume Low density: molecules far apart in a volume.

Convection and the Mantle Chapter 4 Section 2 Standards S 6.4 Students know heat from Earth’s interior reaches the surface primarily through convection.

Convection and the Mantle

 The measure of the average kinetic energy of particles. Temperature doesn’t depend on the number of particles.

HEAT TRANSFER By the end of this presentation you should be able to: Describe conduction, convection and radiation Appreciate that if two areas were at.

Convection Currents and the Mantle

Convection and density

Heat Transfer Conduction, Convection and Radiation

Convection How can heat energy circulate through liquids and gases?

How does energy transfer using convection?

Conduction and Convection

KS3 Physics 8I Heating and Cooling.

Convection 3.3 (a) how temperatures differences lead to the transfer of energy thermally by convection. (d) Convection in liquid and gases in terms of.

How does a hot air balloon work?

Convection and the Mantle

Heat Transfer Conduction, Convection and Radiation

How is heat transferred? What causes convection currents?

Convection Currents and Heat Transfer

II)Convection in the Mantle

Convection Currents and the Mantle

Convection Currents and the Mantle

Warm-up September 1st Answer the following questions with your partner on a piece of paper to turn in: What are the 5 stages to the water cycle? How do.

Convection Currents and Heat Transfer

Designing a conduction experiment

Natural Sciences Grade 7

Radiant Energy and Our Atmosphere

The Transfer of Heat Ms. De Los Rios 7th Grade

Chapter 1 Section 2: Convection Currents and the Mantle

How is heat transferred? What causes convection currents?

Transfer of Energy.

4.2 How Does Heat Move?.

Presentation transcript:

Convection and density The density of a substance depends on how far apart its particles are. If water, oil and air are mixed together, they will settle out in order of density. Which one will rise to the top? The air is least dense and rises to the top. The water is the most dense and sinks to the bottom. This is important in explaining how heat is transferred by convection.

Convection currents in a liquid The movement of hotter areas in a liquid can be seen using potassium permanganate as a dye. This cycle is called a convection current. Can you use the concept of density to explain how the convection current moves?

How does convection in a liquid occur?

Explaining convection

Convection currents in a coal mine When shaft mining was first used to mine coal, convection currents caused by an underground fire were used to ventilate the shafts. Why do you think miners don’t use this method anymore?