# Electricity And Magnetism Post-test Nalepa

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fourth grade pretest trimester three Magnetism and electricity

• 1.

### To pull toward one another, as opposite poles of two magnets pull toward one another.

• A.

Push

• B.

Attract

• C.

Magnetic field

• D.

Repel

B. Attract
Explanation
When two magnets have opposite poles (for example, north and south), they will attract each other. This attraction occurs due to the magnetic field produced by each magnet. The magnetic field lines from one magnet interact with the magnetic field lines from the other magnet, causing them to pull toward each other. Therefore, the correct answer is "attract".

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• 2.

### A pathway for the flow of electricity

• A.

Static

• B.

Switch

• C.

Circuit

• D.

Technology

C. Circuit
Explanation
A circuit is a pathway for the flow of electricity. It is a closed loop that allows electricity to flow from a power source, through various components such as switches and technology, and back to the power source. A circuit can be either static or dynamic, depending on whether the flow of electricity is constant or can be controlled. In this context, circuit is the correct answer as it best describes the pathway for the flow of electricity.

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• 3.

### A complete circuit through which electricity flows

• A.

Closed circuit

• B.

Series

• C.

Magnet

• D.

Lightning

A. Closed circuit
Explanation
A closed circuit is a complete pathway that allows electricity to flow continuously. In a closed circuit, there are no breaks or gaps, ensuring that the current can travel from the source to the load and back without interruption. This is in contrast to an open circuit, where there is a break in the pathway, preventing the flow of electricity. Therefore, a closed circuit is the correct answer as it describes a complete circuit that enables the flow of electricity.

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• 4.

### An individual item in a circuit

• A.

Key

• B.

Patent

• C.

Pole

• D.

Component

D. Component
Explanation
A component refers to an individual item in a circuit. It is a fundamental part of the circuit that performs a specific function. Components can include resistors, capacitors, transistors, and other electronic elements that contribute to the overall functioning of the circuit. They are interconnected to create a circuit and work together to achieve a desired outcome.

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• 5.

### A substance, commonly a metal such as copper or aluminum, through which electricity will flow.

• A.

Conductor

• B.

Prediction

• C.

Telegraph

• D.

Switch

A. Conductor
Explanation
A conductor is a material, often a metal like copper or aluminum, that allows electricity to flow through it easily. It has free electrons that are able to move and carry the electric charge. This makes conductors essential in electrical circuits as they provide a path for the current to flow. In contrast, insulators do not allow electricity to pass through them easily.

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• 6.

### The flow of electricity through a conductor

• A.

Filament

• B.

Force

• C.

Current

• D.

Detector

C. Current
Explanation
The correct answer is "current". Current refers to the flow of electricity through a conductor. It is the movement of electric charge, typically carried by electrons, in a circuit. The flow of current is measured in amperes and is essential for the operation of electrical devices.

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• 7.

### Something that helps you identify or locate something

• A.

Lodestone

• B.

Series

• C.

Electricity

• D.

Detector

D. Detector
Explanation
A detector is a device or instrument that helps identify or locate something. It can be used to detect the presence or absence of certain substances, signals, or phenomena. In this context, a detector can be used to locate or identify something, possibly referring to a specific object or element. The other options, such as lodestone, series, and electricity, do not necessarily have the same function or purpose as a detector in identifying or locating something.

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• 8.

### A form of energy that can produce light, heat, and magnetism.

• A.

Electricity

• B.

Code

• C.

Closed

• D.

Open

A. Electricity
Explanation
Electricity is a form of energy that can produce light, heat, and magnetism. When an electric current flows through a conductor, it generates heat and produces light in the form of incandescent bulbs or LED lights. Additionally, electricity can create magnetic fields when it flows through a wire wrapped around a magnet, which is the underlying principle behind electric motors and generators. Therefore, electricity is the correct answer as it encompasses the ability to generate light, heat, and magnetism.

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• 9.

### A component that uses the electricity from a source to make something happen.

• A.

Intersection

• B.

• C.

Key

• D.

Patent

Explanation
An electricity receiver is a component that is able to utilize the electricity from a power source to initiate or cause a specific action or event to occur. It acts as a device that receives and utilizes the electrical energy to perform a desired function or task. This could include various devices such as motors, appliances, or electronic circuits that rely on electricity as a source of power to operate and carry out their intended purpose.

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• 10.

### Something that provides electric energy to make something happen.

• A.

Magnetism

• B.

Repel

• C.

Telegraph

• D.

Electricity source

D. Electricity source
Explanation
An electricity source refers to something that provides electric energy to make something happen. In the context of the given options, magnetism and repel are not related to the generation of electric energy. The telegraph is a device used for long-distance communication, but it does not generate electricity. Therefore, the correct answer is electricity source, as it directly relates to the provision of electric energy.

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• 11.

### A push or a pull.

• A.

Force

• B.

Battery

• C.

Coil

• D.

Core

A. Force
Explanation
The given options are force, battery, coil, and core. Out of these options, force is the only one that can be described as a push or a pull. A force is a physical interaction between objects that can cause them to accelerate or deform. It can be either a push or a pull, depending on the direction in which it acts. Therefore, force is the correct answer in this context.

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• 12.

### The influence of a permanent magnet’s magnetic field on a piece of iron, which makes the iron act like a magnet.

• A.

Compass

• B.

Filament

• C.

Induced magnetism

• D.

Gap

C. Induced magnetism
Explanation
When a permanent magnet's magnetic field comes into contact with a piece of iron, it can induce magnetism in the iron. This means that the iron temporarily becomes magnetized and exhibits magnetic properties. This phenomenon is known as induced magnetism. The magnetic field of the permanent magnet aligns the magnetic domains within the iron, causing it to act like a magnet.

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• 13.

### A material that prevents the flow of electricity, commonly plastic, rubber, glass, or air.

• A.

Switch

• B.

Magnet

• C.

Gap

• D.

Insulator

D. Insulator
Explanation
An insulator is a material that does not allow the flow of electricity. It is commonly made of materials such as plastic, rubber, glass, or air. Unlike conductors, which allow the flow of electricity, insulators act as barriers and prevent the movement of electric charges. This property makes insulators useful in various applications, such as electrical wiring, where they help to prevent electrical shocks and short circuits.

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• 14.

### An object that sticks to iron

• A.

Magnet

• B.

Code

• C.

Filament

• D.

Insulator

A. Magnet
Explanation
A magnet is an object that sticks to iron due to its magnetic properties. It has a magnetic field that attracts iron and other magnetic materials. When brought close to iron, the magnet exerts a force on the iron, causing it to stick. This property of magnets is widely used in various applications, such as in magnetic compasses, magnetic storage devices, and magnetic closures.

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• 15.

### An incomplete circuit through which electricity will not flow.

• A.

Graph

• B.

Key

• C.

Open circuit

• D.

Pole

C. Open circuit
Explanation
An open circuit refers to an incomplete circuit where there is a gap or break in the path of the electrical current. This interruption prevents the flow of electricity, causing the circuit to be non-functional. In an open circuit, the electrical energy cannot reach its intended destination, such as a light bulb or motor, as there is no complete path for it to follow.

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• 16.

### A circuit that splits into two or more pathways before coming together at the battery.

• A.

Magnet

• B.

Static

• C.

Parallel circuit

• D.

Electricity

C. Parallel circuit
Explanation
A parallel circuit is a type of circuit that splits into two or more pathways before coming together at the battery. In a parallel circuit, each component is connected separately to the battery, creating multiple paths for the flow of electricity. This allows the current to divide and flow through each pathway independently. As a result, if one component fails or is removed, the other components in the circuit can still function properly. This is in contrast to a series circuit, where the components are connected in a single pathway, and the failure of one component can disrupt the entire circuit.

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• 17.

### To push away, as similar poles of two magnets push away from one another.

• A.

Attract

• B.

Switch

• C.

Graph

• D.

Repel

D. Repel
Explanation
The given correct answer is "repel". This term refers to the action of pushing away similar poles of two magnets from each other. When two magnets have the same polarity, they repel each other, causing them to move apart. This phenomenon is a result of the magnetic force between the magnets, which causes them to repel rather than attract.

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• 18.

### A circuit with only one pathway for current flow.

• A.

Intersection

• B.

Series circuit

• C.

Switch

• D.

Static

B. Series circuit
Explanation
A series circuit is a circuit that has only one pathway for current flow. In a series circuit, all the components are connected one after another, forming a single loop. This means that the current has no other options but to flow through each component in the circuit. Therefore, a series circuit is the correct answer because it accurately describes a circuit with only one pathway for current flow.

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• 19.

### Positive and negative electric charges that are separated from each other and are not moving.

• A.

Gap

• B.

Circuit

• C.

Parallel

• D.

Static electricity

D. Static electricity
Explanation
Static electricity refers to the accumulation of electric charges on an object that is not moving. This occurs when positive and negative charges become separated from each other. These charges can build up on an object, creating an imbalance of electrons. However, since the charges are not in motion, it is referred to as static electricity. This phenomenon can cause objects to attract or repel each other, and is commonly experienced when rubbing certain materials together, such as a comb through hair or a balloon against clothing.

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• 20.

### A piece of iron that behaves like a magnet when it is touching a permanent magnet.

• A.

Temporary magnet

• B.

Nail

• C.

Repel

• D.

Switch

A. Temporary magnet
Explanation
A piece of iron that behaves like a magnet when it is touching a permanent magnet is called a temporary magnet. This means that the iron piece only exhibits magnetic properties when it is in close proximity to a permanent magnet, but loses its magnetism once it is separated from the magnet. Unlike a permanent magnet, which retains its magnetism even without external influence, a temporary magnet requires the presence of another magnet to exhibit magnetic behavior.

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