Study/Learn:
Kinetic Energy
Chemical Energy
Electricity
Remember Vision Days? We worked with stored energy in molecules to make a chemical reaction, which is kinetic energy. Think back to what we did. We put an alka-seltzer tablet in a small container, this tablet had molecules stored in it, when it reacted with the molecules in water, it created pressure and converted from potential energy to kinetic energy. The same thing happens with vinegar and baking soda, or gasoline in your car, or eating food. So...
Chemical Energy is energy inside atoms and molecules. When a chemical reaction occurs, chemical energy is released from the atoms and molecules. Sometimes, chemical energy is converted into ELECTRICAL ENERGY, or ELECTRICITY.
Electricity comes from ELECTRONS. An electron is part of an atom.
Look at your body. Notice that your body has different parts. You have eyes for seeing, legs for walking, and arms and hands for picking things up. You also have lots of organs that all do different things. In a similar way, an atom has different parts. The 3 main parts are called protons, neutrons, and electrons. The protons and neutrons are in the center of the atom, and the electrons move around the outside.
I know you have all learned this at some point! This is a fun review! There will be kahoot questions on all the information you learn here. If you haven't learned this before, now is the time!
Watch this video about an atom.
Watch this video about a molecule.
Watch this video about atom. Because it's pretty cool. (I can't figure out why it's starting in the middle of the video. Just start it at the beginning.)
The electrons are what make atoms stick to each other to form molecules during a chemical reaction. The electrons can jump back and forth during a chemical reaction. That is, atoms can exchange electrons. It is the moving of these electrons that causes electrical energy.
Watch this video about static electricity.
Ok, so we have learned how electrical energy comes from the movement of electrons. Everything that is made of atoms has electrons. Many kinds of materials will allow a small number of electrons to move through them, like marshmallows, wood, teddy bears, and popcorn. Only some types will allow lots of electrons to move through them. These types of materials conduct electricity. This means that lots of electrons can flow through them, like water flowing through a garden hose. The things in your house that you have to plug in use electricity. The appliance is connected to a cable, the cable is plugged in and connects with another cable that runs through the house and then connects with another cable outside the house that bring electricity into the house. Most of these cables have a copper metal at the center of them. Copper allows electrons to flow because they are "loosely" attached. They can easily jump from one atom to the next. The materials that don't allow for flow don't conduct electricity, they are called insulators. Insulators keep the electrons from moving through your body when you touch them. This is why all the wires that you plug in are covered in plastic. Plastic is an insulator. Your body will conduct electricity, and if you touch a wire used for moving electricity, you will get shocked!
Watch this video about conductors and insulators.
Know/Understand:
1. In the physics book on pages 120 and 121. Look at the timeline and choose one of those people or events and learn more about them. Come prepared to teach us what you learned. All of the things/people on the timeline are in the physics book. Find the blurb about them and then find a few more things to share with us.
2. Choose an experiment to do that has to do with electricity, chemical energy or kinetic energy. (Next time we will be doing more magnetism stuff, so try to stick with the electricity experiments.). You can use these experiments, or find your own. Make a video of what you did and explain your results. You may of course work with a friend or a sibling. Or, bring your experiment to do in class.
Become and Serve:
Listen to or read this talk by President Nelson. It's kind of fun to see him as a young Elder in the quorum of the 12 apostles. Especially pay attention the section called "Source of Spiritual Power."
