Question

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Part 2 - Conductivity, Electricity, Insulator, Solution, etc. Make sure you are reviewing Unit 4 Lessons 4-6 to help with portfolio concepts.
Review the recording and make sure you are reading Unit Lesson 5 (pages 2-8)





















Question 1
Electricity is energy that (1 point)
Responses

comes from the movement of charged particles.
comes from the movement of charged particles.

comes from covalent molecules
comes from covalent molecules

is always contained in solutions
is always contained in solutions

will not complete a circuit
will not complete a circuit
Question 2
The role of the battery in the circuit of a conductivity meter is(2 points)
Responses

to produce ions in solution
to produce ions in solution

to measure the amount of ions in solution
to measure the amount of ions in solution

to power the lightbulb in covalent and ionic solutions
to power the lightbulb in covalent and ionic solutions

the power source
the power source
Question 3
What needs to occur in a solution in order for it to conduct electricity?(2 points)
Responses

It needs to have a substance that separates into ions
It needs to have a substance that separates into ions

It needs to have a substance that is always covalent
It needs to have a substance that is always covalent

It needs to have a substance that contains chloride
It needs to have a substance that contains chloride

It needs to produce a chemical reaction
It needs to produce a chemical reaction
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Answer 1

Here are the answers with brief explanations:

1) comes from the movement of charged particles.
- Electricity is the flow of charged particles (usually electrons or ions).

2) the power source.
- The battery provides the voltage/potential that drives current through the conductivity meter circuit.

3) It needs to have a substance that separates into ions.
- Only solutions that produce free ions (electrolytes) can carry electric current.