Heat and Temperature Unit Review April 2009. Human needs have led to technologies for obtaining and controlling heat. What are some heat technologies.

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Presentation transcript:

Heat and Temperature Unit Review April 2009

Human needs have led to technologies for obtaining and controlling heat. What are some heat technologies we have today? What are some heat technologies we have today? Wants vs. Needs: Label each of the technologies you just listed. Wants vs. Needs: Label each of the technologies you just listed. What is a Standard of Living? What is a Standard of Living?

What does Sustainable mean? Sustainable use of resources means using resources “wisely”. Sustainable use of resources means using resources “wisely”. Don’t use too much of one resource or it will run out. Don’t use too much of one resource or it will run out. Replace what you have used. Replace what you have used.

What was the Caloric Theory? The belief that heat was a fluid because it moved from one object to another. The belief that heat was a fluid because it moved from one object to another. It was wrong because…. It was wrong because…. Heat does not have mass! Heat does not have mass!

States of Matter What are the 3 States of Matter? What are the 3 States of Matter? Solid Solid Liquid Liquid Gas Gas

What are the Particles doing in a Solid? Particles are stuck together. Particles are stuck together. Particles are barely moving. Particles are barely moving. Solids have a definite shape and volume. Solids have a definite shape and volume. Think of an ice cube! Think of an ice cube!

What are the Particles doing in a Liquid? Particles are starting to spread out. Particles are starting to spread out. Particles are starting to move faster. Particles are starting to move faster. Liquids do not have a specific shape. Liquids do not have a specific shape. Liquid does have a specific volume. Liquid does have a specific volume.

What are the Particles doing in a Gas? Particles are very spread out. Particles are very spread out. Particles are moving very fast. Particles are moving very fast. Has no definite shape or volume. Has no definite shape or volume.

What is the Particle Model of Matter? Everything is made up of Particles Everything is made up of Particles All Particles have space between them All Particles have space between them Particles are Always moving Particles are Always moving Adding heat make Particles move faster. Adding heat make Particles move faster.

Definitions Temperature Temperature Average Kinetic Energy of Particles Average Kinetic Energy of Particles Thermal Energy Thermal Energy Total kinetic Energy of Particles Total kinetic Energy of Particles Heat Heat Transfer of energy from High Kinetic Energy to Low Kinetic Energy Transfer of energy from High Kinetic Energy to Low Kinetic Energy

What happens when heat is added to a substance? Particles move faster Particles move faster Particles spread out Particles spread out

Name 3 Important people to the measurement of Temperature. Galileo Galilei Galileo Galilei Gabriel Fahrenheit Gabriel Fahrenheit Anders Celsius Anders Celsius

What are 3 ways heat Transfers? Conduction Conduction When two objects are touching When two objects are touching Convection Convection Circular Motion Circular Motion Radiation Radiation Heat Waves Heat Waves

Conductors What is it? What is it? List some good conductors. List some good conductors.

Insulators What is it? What is it? List some good insulators. List some good insulators.

What are 4 natural sources of heat? Sun Sun Fire Fire Decay Decay Earth Earth

What is a Passive Heating System? Reduces heat loss and increases heat gain using the sun. Reduces heat loss and increases heat gain using the sun. How? How? Insulation Insulation South Facing Windows South Facing Windows

What is an Active System? Trapping and collecting solar energy using mechanical devices. Trapping and collecting solar energy using mechanical devices. How? How? Fans Fans Pumps Pumps Collectors Collectors Storage Device Storage Device

How does a Cooling System work? Coolant evaporates at low temperatures. Coolant evaporates at low temperatures. As it evaporates, it absorbs all the heat in a space. As it evaporates, it absorbs all the heat in a space. This makes it cold in the space. This makes it cold in the space.

What are two types of Natural Resources? Renewable Renewable Will never run out Will never run out Wind, Sun, Water Wind, Sun, Water Non-Renewable Non-Renewable Will eventually run out Will eventually run out Gas, Oil, Coal

What is a Fossil Fuel? Remains of plants and animals. Remains of plants and animals. Why do we use them? Why do we use them? Easy to find and transport Easy to find and transport What are examples? What are examples? Gas, Coal, Oil Gas, Coal, Oil Cost of using them? Cost of using them? Economic: Actual cost in dollars Economic: Actual cost in dollars Environmental : Negative impact on Earth Environmental : Negative impact on Earth Societal: Negative impact on People Societal: Negative impact on People

Advantages/Disadvantages of Fossil Fuels GoodBad CheapWill run out CheapWill run out Easy to findBad for Earth Easy to findBad for Earth Easy to Get Bad for Health Easy to Get Bad for Health Easy to Transport Easy to Transport

Alternatives to Fossil Fuels Wind Wind Solar Solar Nuclear Nuclear Hydro Electric (Water) Hydro Electric (Water)

Advantages /Disadvantages of using Alternatives Good Bad Good for EarthExpensive Good for EarthExpensive Good For People Location Good For People Location Renewable Renewable

Test Tuesday!!! GOOD LUCK!!!