|Physical Science||Transformation of Energy 6C2.00||Process Of Science||Observing 1.1 ab|
CONTENT STANDARD: Physical Science
CONTENT TOPIC: Transformation of Energy
CONCEPT: Electricity involves the movement of electrons.
CONTENT OBJECTIVE: 6C2.00 To understand the structure of batteries and how the changing of chemical to electrical energy is useful
INSTRUCTIONAL OBJECTIVES: The learner will:
TN COMPONENT OF SCIENCE: Process Of Science
BENCHMARK: By incorporating prior knowledge with the process of observations a better understanding of one's environment may develop.
1.1b The human senses and technological instruments are used to gather information from the environment.
BENCHMARK: Scientific investigation is enhanced through the use of technology.
The dry cell is a closed container, usually a can, made of zinc with a carbon rod in the center surrounded with a wet part containing ammonium chloride with particles of manganese dioxide and powdered carbon. The wet cell has a zinc and a copper pole placed in a liquid, while the dry cell has a zinc and a carbon pole placed in a paste. The dry cell is easier to handle. Wet cells are used in car batteries.
1. Place a copper strip in one end of a lemon and a zinc strip in the other end. Use a meter to check for current in a complete, closed circuit.
2. Cut open a spent dry cell battery with a hacksaw. Label the parts that are exposed. Compare the dry cell to the wet cell. WARNING: Wear rubber gloves while cutting the battery.
3. Expose the inside of the lemon in the same way as the dry cell battery. Make a chalkboard list of the differences.)
1. A closed container, usually a can made of zinc with a carbon pole placed in paste is a ________ (Dry Cell).
2. A ____ _____ (Dry Cell) is easier to handle than a _____ _____ . (Wet cell)
1. Name some uses of wet cell batteries.
2. Name some uses of dry cell batteries.
3. Find out what materials can be used as electrolytes and what materials can be used as electrodes.
4. Recall the previous lesson where chemical energy was converted to electrical? Name examples where this takes place in our environment.
5. Name some ways that batteries can be used to replace burning fossil fuels.
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