Simple Circuits: Paths, Switches & Energy — Practice · Grade 6 Science

Chapter: Electricity, Magnetism & Light

What this practice covers

By the end of Simple Circuits: Paths, Switches & Energy you should be able to:

8 questions, written answer and multiple choice, each with a worked explanation.

Vocabulary used: circuit, parallel branch, evidence, system boundary, uncertainty.

Problem 1

Why does closing the switch matter?
Answer and explanation

It connects the conducting path so current can be sustained in the stated battery–lamp model.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 2

Is charge used up at the lamp?
Answer and explanation

No. The lamp receives energy and transforms its distribution; charge continues through the circuit under the model.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 3

Does every open switch necessarily turn off both lamps?
Answer and explanation

No. Its location matters: a branch switch and a switch in the shared path affect different routes.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 4

What must be checked beyond a diagram?
Answer and explanation

Actual connections, component ratings, source condition, and the intended switch positions. Paper evidence establishes the modeled logic, not a tested household appliance.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 5

Develop a complete response: Recommend a design for independent lamp control and explain a limitation. Include relevant evidence and one method or model limit.
Answer and explanation

The parallel branch design provides the modeled independent control: opening A does not interrupt B’s complete path. The common switch can still stop both. The records do not establish equal brightness, battery lifetime, or a safe real construction; those require a rated design and further evidence.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 6

Apply the unit independently: A lamp fails although the drawn loop is complete. Give two plausible checks without using wall electricity. Give a reason and a relevant qualification.
Answer and explanation

Inspect an approved kit’s contacts and source condition under adult guidance, or evaluate those possibilities in the supplied record. A complete drawing does not establish that every actual component functions.

Compare the scientific meaning and reasoning after an independent attempt. A different accurate supported response can be correct; human review is required.

Problem 7

Which statement correctly uses circuit in Simple Circuits: Paths, Switches & Energy?
  1. circuit: A connected path supporting charge flow and energy transfer under stated conditions.
  2. The lamp consumes the charge, leaving none in the return path.
  3. A picture of a closed circuit proves a real device is safe and functioning.
  4. One illustrative result establishes every real condition and needs no further evidence.
Answer and explanation

circuit: A connected path supporting charge flow and energy transfer under stated conditions.

A connected path supporting charge flow and energy transfer under stated conditions. The parallel branch design provides the modeled independent control: opening A does not interrupt B’s complete path. The common switch can still stop both. The records do not establish equal brightness, battery lifetime, or a safe real construction; those require a rated design and further evidence.

Problem 8

Which statement correctly uses parallel branch in Simple Circuits: Paths, Switches & Energy?
  1. The lamp consumes the charge, leaving none in the return path.
  2. parallel branch: A separate conducting route between shared connection points in a circuit.
  3. A picture of a closed circuit proves a real device is safe and functioning.
  4. One illustrative result establishes every real condition and needs no further evidence.
Answer and explanation

parallel branch: A separate conducting route between shared connection points in a circuit.

A separate conducting route between shared connection points in a circuit. The parallel branch design provides the modeled independent control: opening A does not interrupt B’s complete path. The common switch can still stop both. The records do not establish equal brightness, battery lifetime, or a safe real construction; those require a rated design and further evidence.

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