Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is...

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Energy Ms. Moore 10/1/12

Transcript of Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is...

Page 1: Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples: Forms.

Energy

Ms. Moore10/1/12

Page 2: Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples: Forms.

What is energy?

Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples:

Forms of energy: Electrical Chemical Radiant Thermal

Energy can be stored and move from place to place.

Page 3: Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples: Forms.

Kinetic Energy

Kinetic energy (KE) is the energy a moving object has because of its motion. The kinetic energy of a moving object

depends on an object’s mass and its speed.

Kinetic energy (joules) = ½ mass (kg) x speed2 (m/s)

Page 4: Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples: Forms.

Practice Problems

A baseball with a mass of 0.15kg is moving at a speed of 40m/s. What is the baseball’s kinetic energy?

A sprinter has a mass of 80kg and a kinetic energy of 4,000 J. What is the sprinter’s speed?

A car with a mass of 1,500kg doubles its speed from 50km/h to 100km/h. By how many times does the kinetic energy of the car increase?

Page 5: Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples: Forms.

Lab

Read the mini lab found on page 103.

Create a table of your results and be ready for a discussion.

How did the take off speed of the nickel depend on the distance that you stretched the rubber band?

How did the KE of the nickel depend on the distance the rubber band was stretched?

Page 6: Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples: Forms.

Potential Energy

Energy doesn’t have to involve motion. Motionless objects have energy.

Potential energy (PE) is stored energy due to position. Examples:

Page 7: Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples: Forms.

3 Types of PE:

Elastic potential energy is energy stored by something that can stretch or compress Rubber band or spring

Chemical Potential Energy is energy stored in chemical bonds Food and gasoline

Page 8: Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples: Forms.

Gravitational Potential Energy (GPE) is energy stored by objects due to the position above Earth’s surface. Depends on the objects mass and height

above the ground.

GPE (j) = mass (kg) X 9.8 (m/s2) X height (m)

Page 9: Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples: Forms.

Practice Problems

Find the GPE of a coffee mug with a mass of 0.3kg that is on a counter top 1m high above the ground.

How high above the ground is a baseball with a mass of 0.15kg that has a GPE of 73.5J?

A rock climber is 200m above the ground and has a GPE of 117,600J. What is the rock climber’s mass?

Page 10: Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples: Forms.

Lab: Bouncing Balls

Why do bouncing balls stop bouncing?

Refer to page 106

Measure tennis ball vs. bouncy ball

Include a table of results

Page 11: Ms. Moore 10/1/12. Energy is required for any change that occurs, no matter how small. Energy is the ability to cause change. Examples: Forms.

Gas Exchange in Plants. Reactions that involve gasses Photosynthesis Photosynthesis Occurs in the chloroplast Occurs in the chloroplast Energy produced.

Gas Exchange in Plants. Reactions that involve gasses Photosynthesis Photosynthesis Occurs in the chloroplast Occurs in the chloroplast Energy produced.

Chapter 5 Work and Machines. WORK The transfer of energy that occurs when a force makes an object move The transfer of energy that occurs when a force.

Chapter 5 Work and Machines. WORK The transfer of energy that occurs when a force makes an object move The transfer of energy that occurs when a force.

Climate Change, Energy, and Developing Countriesvjel.vermontlaw.edu/.../Climate-Change-Energy-and-D… ·  · 2013-07-01Climate Change, Energy, and Developing Countries ... interactions

Climate Change, Energy, and Developing Countriesvjel.vermontlaw.edu/.../Climate-Change-Energy-and-D… ·  · 2013-07-01Climate Change, Energy, and Developing Countries ... interactions

Energy What is Energy? The ability to make things move/cause change or to do work Any change Every change that occurs involves energy….changes REQUIRE.

Energy What is Energy? The ability to make things move/cause change or to do work Any change Every change that occurs involves energy….changes REQUIRE.

Chemical Reactions and Enzymes. Energy and Matter Energy The ability to do work or cause change Occurs in various forms Can be converted to another form.

Chemical Reactions and Enzymes. Energy and Matter Energy The ability to do work or cause change Occurs in various forms Can be converted to another form.

1 Energy Occurs in Many Forms TEKS 5.8A. 2 The student knows that energy occurs in many forms. The student is expected to: A. Differentiate among forms.

1 Energy Occurs in Many Forms TEKS 5.8A. 2 The student knows that energy occurs in many forms. The student is expected to: A. Differentiate among forms.

Focus on Energy | Focus on Energy - Environmental and Economic … · 2015. 8. 20. · climate change will depend, in part, on the rate and magnitude at which climate change occurs.

Focus on Energy | Focus on Energy - Environmental and Economic … · 2015. 8. 20. · climate change will depend, in part, on the rate and magnitude at which climate change occurs.

CO + 2Hgreenall-physicalscience20.wdfiles.com/local--files/main...Chemical Bond Energy Whenever a chemical reaction occurs, there is always a change in energy. Where does this energy

CO + 2Hgreenall-physicalscience20.wdfiles.com/local--files/main...Chemical Bond Energy Whenever a chemical reaction occurs, there is always a change in energy. Where does this energy

Chapter Fourteen – Change and Innovation. Understand why change occurs Be familiar with the process of organizational change Will be able to discuss.

Chapter Fourteen – Change and Innovation. Understand why change occurs Be familiar with the process of organizational change Will be able to discuss.

Energy and Work. Energy Energy is the ability to change or cause change. If something has no energy, there can be no change.

Energy and Work. Energy Energy is the ability to change or cause change. If something has no energy, there can be no change.

Lesson 20 Any change that occurs requires energy Energy is the ability to do work or cause change 1.

Lesson 20 Any change that occurs requires energy Energy is the ability to do work or cause change 1.

BIOCHEMICALS PATHWAYS Photosynthesis PHOTOSYNTHESIS PHOTOSYNTHESIS OCCURS WITHIN CHLOROPLASTS RADIANT ENERGY (SUNLIGHT) IS CONVERTED TO CHEMICAL ENERGY.

BIOCHEMICALS PATHWAYS Photosynthesis PHOTOSYNTHESIS PHOTOSYNTHESIS OCCURS WITHIN CHLOROPLASTS RADIANT ENERGY (SUNLIGHT) IS CONVERTED TO CHEMICAL ENERGY.

What is energy? Energy is defined as; the ability to do work or cause a change. Energy occurs in many forms and is used in our everyday lives. It can be.

What is energy? Energy is defined as; the ability to do work or cause a change. Energy occurs in many forms and is used in our everyday lives. It can be.

Do Now #7 A physical change occurs when a substance changes form, but stays the same. A chemical change occurs when a substance changes into a new, different.

Do Now #7 A physical change occurs when a substance changes form, but stays the same. A chemical change occurs when a substance changes into a new, different.

LEARNING A systematic, relatively permanent change in behavior that occurs through experience. 2 types: 1. Associative learning: occurs when we make a.

LEARNING A systematic, relatively permanent change in behavior that occurs through experience. 2 types: 1. Associative learning: occurs when we make a.

Every change that occurs—large or small—involves energy.

Every change that occurs—large or small—involves energy.

Prague, Czech Republic. Energy (ATPADP) Energy from ATP causes actin molecules to change shape. When this occurs in a large array of actin molecules.

Prague, Czech Republic. Energy (ATPADP) Energy from ATP causes actin molecules to change shape. When this occurs in a large array of actin molecules.

Respiration Chapter 6. Cellular Respiration - Basics releases energy from glucose released energy is chemical energy occurs in cell cytoplasm mitochondria.

Respiration Chapter 6. Cellular Respiration - Basics releases energy from glucose released energy is chemical energy occurs in cell cytoplasm mitochondria.

Topic: Potential Energy Curve Do Now: p.26. Spontaneous Processes no outside intervention =physical or chemical change that occurs with no outside intervention.

Topic: Potential Energy Curve Do Now: p.26. Spontaneous Processes no outside intervention =physical or chemical change that occurs with no outside intervention.

Chapter 7 Chemical Reactions. Understanding Chemical Reactions A chemical reaction occurs when: A change in energy occurs Exothermic –gives off energy.

Chapter 7 Chemical Reactions. Understanding Chemical Reactions A chemical reaction occurs when: A change in energy occurs Exothermic –gives off energy.