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Science Reviewer: 3rd Electricity Concepts

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Questions and Answers

What is the purpose of a conventional symbol in a circuit diagram?

To illustrate the circuit components (correct)
To represent the power source
To show the circuit is connected
To indicate the circuit is safe

What is the main function of a circuit breaker?

To facilitate chemical digestion
To melt when there is overloading of current
To turn off the circuit when there is overloading of current (correct)
To grind and juice the food

What is the purpose of a fuse?

To turn off the circuit when there is overloading of current
To transport nutrients through the circulatory system
To facilitate mechanical digestion
To act as a sacrificial device that melts when there is overloading of current (correct)

What is the main purpose of the digestive system?

To grind and juice the food to extract its nutrients (D) Signup and view all the answers

What are the two main processes of digestion?

Mechanical digestion and chemical digestion (A) Signup and view all the answers

How many stages of food processing are mentioned in the text?

Four (D) Signup and view all the answers

What is the relationship between voltage and current according to George Simon Ohm's law?

Voltage is directly proportional to current. (D) Signup and view all the answers

In a series circuit, what happens if one light bulb goes out?

All other light bulbs go out. (C) Signup and view all the answers

What flows in a conductor, measured in ampere?

Current (C) Signup and view all the answers

What is the main advantage of a parallel circuit over a series circuit?

One light bulb can go out without affecting others (D) Signup and view all the answers

What is the unit of resistance?

Ohm (A) Signup and view all the answers

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