Lecture on Static Electricity

Static Electricity when a material has an excess or a lack of electrons.

A Capacitor holds a charge on its plates.

Thermocouple (copper & nickel or copper & iron) Electrical Energy Induction Thermocouple (copper & nickel or copper & iron)

Circuits Series Parallel

Switch 1 Switch 2 Lamp 1 Lamp 2

Short circuit

Foil (glued onto bottom half of stick) ‘ El Motor Coil tube Wire coil (covered with glue) Wood shtick Wire ends (stripped) Foil (glued onto bottom half of stick)

Foil (through bottom of holes) Motor Box Magnets Foil (through bottom of holes)

Circuit Board

Integrated circuits

On a hot day, Jenny walked home with a bag of chocolate chips On a hot day, Jenny walked home with a bag of chocolate chips. When she arrived the chocolate chips had melted in the bag. Why did they melt? Heat transferred from the chocolate chips to the bag. Heat evaporated from the bag to the chocolate chips. Heat transferred from the environment to the chocolate chips. Heat condensed from her hand to the chocolate chips.

Energy appears in many forms. What form of energy is lightning Energy appears in many forms. What form of energy is lightning? electrical energy mechanical energy magnetic energy sound energy

A glass of water kept at room temperature long enough will become empty because water molecules slowly leak through the walls of the glass. water molecules move into the air as gas molecules. water left in a glass starts to boil and becomes a gas. water slowly combines with oxygen to become carbon dioxide.

Water that flows from behind a large dam can cause machines to produce electricity. What change takes place? Heat energy changes into mechanical energy. Sound energy changes into electrical energy. Chemical energy is used to produce electrical energy. Mechanical energy is used to produce electrical energy

When ice cream is left out of the freezer on a table for a long time, it melts. This change in state is caused by the ice cream absorbing heat. ice cream giving up heat. air absorbing heat. table absorbing heat

People in many places in California produce their electricity from wind energy. Which must be true about the winds in these places in California? The winds are cold. The winds blow very little. The winds blow most of the time. The winds blow mostly in the morning.

A block of ice on a glass plate is put on a metal shelf in a freezer A block of ice on a glass plate is put on a metal shelf in a freezer. Which could cause the ice to change to liquid water? putting a fan that blows on the ice inside the closed freezer raising the temperature inside the freezer wrapping a blanket around the ice inside the freezer putting the ice directly on the metal shelf inside the freezer

When water boils in a pan on a hot burner, heat gets to the water mainly by… conduction of heat through the pan. radiation of heat through the pan. reflection of heat from the burner. absorption of heat from the air in the room

When a hair dryer is being used, one of the energy transformations that takes place is electrical to chemical. electrical to mechanical. mechanical to electrical. chemical to electrical