Negative terminal Positive terminal Anode Cathode

Science 9
Batteries and Voltage
Name ______________________
ELECTROCHEMICAL CELLS (Batteries) - pg. 306-307
Batteries are also known as electrochemical cells since they use a chemical reaction to produce
electricity. Due to this chemical reaction, electrons build up on the negative terminal of the battery. When
connected in a circuit, the electrons move from the negative terminal to the positive terminal (and power things
along the circuit).
1. Identify 8 different types of batteries …
2. Label the diagram below using the following terms…
Negative terminal
Positive terminal
3. On the diagram above, use arrows to show the direction the electrons flow thought the circuit.
4. When is a battery “dead”?
5. What is the difference between a dry cell and a wet cell?
6. What is the difference between a secondary cell and a primary cell?
7. Why is it unsafe to recharge primary cells?
Why do batteries have an expiry date on their label?
9. How do companies that produce devices which run on batteries ensure the batteries are installed
ELECTRIC POTENTIAL (Voltage) - pg. 302-303
When the chemical reaction occurs in a battery, it builds up a stockpile electrons. These electrons were
given a certain amount of energy from the chemical reaction. The electrons will carry this electrical potential
energy until they flow through a circuit and give up their energy to something that needs it (ex: light bulb).
10. Define “electrical potential”.
11. What is the unit of electrical potential?
12. How many volts is a …
a. Wall outlet in a house?
b. Square battery?