Electric Charge, Attraction & Materials — Practice · Grade 6 Science

Chapter: Electricity, Magnetism & Light

What this practice covers

By the end of Electric Charge, Attraction & Materials you should be able to:

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

Vocabulary used: net charge, conductor, evidence, system boundary, uncertainty.

Problem 1

Does losing electrons make the object negative?
Answer and explanation

No. It leaves more positive than negative charge in the stated model, so its net charge becomes positive.

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

Problem 2

Can repulsion occur without touching?
Answer and explanation

Yes. Electric interaction acts through a field; contact is not required for the modeled force.

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 attraction uniquely identify the paper’s net charge?
Answer and explanation

No. A shifted distribution in neutral material can also produce attraction; additional evidence is needed.

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

Problem 4

Why should handling be recorded?
Answer and explanation

It can affect charge movement and the observed interaction, so a difference cannot be assigned to material alone without comparable conditions.

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: Find each net imbalance and explain the total charge account. Include relevant evidence and one method or model limit.
Answer and explanation

A has ten positive and eight negative units, a net positive two. B has ten positive and twelve negative, a net negative two. The combined twenty positive and twenty negative units remain; charge is transferred, not created. These are model units, not measured coulombs or a rule for every rubbed material.

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 charged object attracts a neutral water stream in a supplied model. Must the stream have acquired an opposite net charge? Give a reason and a relevant qualification.
Answer and explanation

No. Polarization can shift the interaction without requiring an opposite total net charge. Explain the modeled distribution rather than infer net charge from attraction alone.

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 net charge in Electric Charge, Attraction & Materials?
  1. One illustrative result establishes every real condition and needs no further evidence.
  2. Rubbing creates electric charge from nothing.
  3. Attraction always proves two objects have opposite net charges.
  4. net charge: The imbalance between positive and negative charge in the chosen system.
Answer and explanation

net charge: The imbalance between positive and negative charge in the chosen system.

The imbalance between positive and negative charge in the chosen system. A has ten positive and eight negative units, a net positive two. B has ten positive and twelve negative, a net negative two. The combined twenty positive and twenty negative units remain; charge is transferred, not created. These are model units, not measured coulombs or a rule for every rubbed material.

Problem 8

Which statement correctly uses conductor in Electric Charge, Attraction & Materials?
  1. conductor: A material in which charge can move relatively readily under stated conditions.
  2. Rubbing creates electric charge from nothing.
  3. Attraction always proves two objects have opposite net charges.
  4. One illustrative result establishes every real condition and needs no further evidence.
Answer and explanation

conductor: A material in which charge can move relatively readily under stated conditions.

A material in which charge can move relatively readily under stated conditions. A has ten positive and eight negative units, a net positive two. B has ten positive and twelve negative, a net negative two. The combined twenty positive and twenty negative units remain; charge is transferred, not created. These are model units, not measured coulombs or a rule for every rubbed material.

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