1. 5. Transformation in matter: Energy
Humanitas Bilingual School. 2nd ESO. Physics and Chemistry. Ana Rupérez.

2. Physical and chemical changes
Physical changes
Chemical changes
Change in physical properties, but substance stay with the same chemical composition
Change of shape
“ of state
“ of mass
“ of volumen
“ of temperature
Change of the chemical characteristics. After the change we obtain a different substance.
Burning: combustión
Rusting: oxidation
Bleaching or adding a chemical
Spoiling food
Most of the cooking procedures

3. Some examples and exercises
Find a video about the difference between physical and chemical changes in youtube and watch it.
Quiz physical or chemical change

4. What is energy Watch this video Brainstorming from the video:
Energy is everything
It is here since the beginning of the Universe.
It can´t be created nor destroyed, only transformed.
DEFINITION: Energy is the ability to do work or transfer heat. Work is the displacement of something applying a force.

5. Types of energy Chemical: stored in chemical bonds.
Thermal: related to the movement of the particles (kinetic particle theory)
Nuclear: inside the nucleus.
Fusion: in stars. Two hydrogen converge to form one Hellium atom.
Fision: big nucleus (as Uranium) that are unstableare, when shooted with particles that liberate more particles (nuclear reaction that can produce nuclear explossions if they´re not controlled)
Electrical: related to the movement of electrons.
Mechanical:
Kinetic: related to object in motion
Potential: related to position
Gravitational: position above the ground (height)
Elastic: in elastic material that are not at rest.
Electromagentic (light): contained in electromagnetic waves

6. Nuclear energy

7. Mechanical energy

8. Electromagnetic energy

9. E sources vs. E types Renewable: Non renewable: Chemical Electrical
Solar: sun
Eolic: wind
Hydraulic: wáter
Geothermal: internal heat
Tidal: from tides
Biofuel?
Non renewable:
Fossil fuels: gas, petrol, coal
Nuclear
Chemical
Electrical
Mechanical
Nuclear
Electromagnetic
thermal

10. Resources for understanding the Energy problem
Carbon lab: this shows a simulation that relates the Carbon dioxide emisions with the use of fossil fuels. By changing the inputs in the simulator, we can run the decay of CO2 emisions. The objective is not to pass the red line in year Can we sucess in this?? Link to website with the Project. Link to the Carbon lab simulator.
Energy lab: Using this simulator, you'll try to find the best mix of energy sources in order to keep the total atmospheric CO2 under 550 ppm. Link to website with the project. Link to the energy lab simulator
Can we rely on Solar and Wind energy? Video
Resources for understanding the Energy problem

11. Energy sources In groups, investigate about a source of energy.
Explain how it Works
Write advantages and disadvantages
Explain this to the class.
Energy sources

12. Reduce, reuse, recycling
Energy problem
Greenhouse effect
Global warming
Reduce, reuse, recycling