Educational worksheet on alternating and direct current, designed to teach the differences between AC and DC power.
A worksheet titled "Alternating and Direct Current" with fill-in-the-blank questions about AC and DC electricity, featuring a logo with a red and green question mark.
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Step-by-step solution for: Alternating and direct Current - Cloze Test Worksheet ...
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Show Answer Key & Explanations
Step-by-step solution for: Alternating and direct Current - Cloze Test Worksheet ...
Okay, let's solve this worksheet together. We need to fill in the blanks using the words from the box at the top. I will go through the text paragraph by paragraph and find the correct word for each blank.
Paragraph 1: Alternating and Direct current
1. Blank 1: The sentence says "_______ comes in two forms...". Looking at the word box, the word "Electricity" fits perfectly here because electricity is the general term for the two types mentioned (AC and DC).
2. Blank 2: The sentence lists the two forms: "alternating current (AC) and _______ current (DC)". The full name for DC is "Direct current". So, the word is "direct".
3. Blank 3: The sentence says "Both are _______ to enable the functioning of our electronics...". We need an adjective that means "necessary" or "very important". The word "essential" from the box fits this context perfectly.
4. Blank 4: The sentence ends with "...what they _______ to?". We need a verb that means "do". The word "apply" is in the box, but "do" isn't. Let's look at the context. It's asking what they apply to? Or perhaps what they are used for? Wait, looking at the word list again. Is there a better word? "apply" fits grammatically ("what they apply to"). Let's keep that in mind. Actually, looking closer at the sentence structure "do you know the difference between the two and what they _______ to?", the word "apply" makes sense here as in "what do they apply to?".
Paragraph 2: What is AC power?
5. Blank 5: "Alternating current (AC) power is the _______ electricity that comes out of power outlets...". We need an adjective to describe the electricity from outlets. "standard" is a good fit here, as AC is the standard form of electricity for homes.
6. Blank 6: "...and is _______ as a flow of charge that exhibits a periodic change in direction." We need a verb in the past participle form. "defined" fits well here. It is *defined* as a flow of charge...
7. Blank 7: "AC's current flow changes between _______ and negative...". The opposite of negative in electricity is "positive". This word is in the box.
8. Blank 8: "...this wave is _______ when alternators at power plants create AC power." We need a verb in the past participle form. Alternators *generate* or *create* power. The word "generated" is not in the box, but "generate" is. Wait, the sentence structure "this wave is [verb-ed]". Let's look for other words. "created"? Not in the box. "caused"? Maybe. Let's re-read. "this wave is _______ when alternators... create AC power." Perhaps "generated" is intended but the base form "generate" is in the box. Let's look for other options. Is there a word like "formed"? No. Let's look at the next paragraph for clues or come back. Actually, "generated" is the most logical, but since only "generate" is in the box, maybe the worksheet expects the student to conjugate it, or perhaps there's another word. Let's look at the word "caused". "this wave is caused when..." - that works grammatically. Let's tentatively choose "caused".
Paragraph 3: How AC is created
9. Blank 9: "Alternators create AC power by _______ a wire loop inside a magnetic field." We need a verb ending in -ing. The word "spinning" is in the box and describes the action of an alternator.
10. Blank 10: "...the current changes _______ when the wire spins from one of the magnetic field's poles to the other." We need an adverb or adjective describing the change. The word "direction" is in the box, but we need an adverb? No, "changes direction" is a common phrase. Wait, the blank is "changes _______". If the word is "direction", the sentence would be "the current changes direction". That makes perfect sense.
11. Blank 11: "This wave-like motion means that AC power can travel farther than DC power, a huge advantage when it comes to delivering power to consumers via power _______." We need a noun related to power delivery. "pylons" (the tall towers that hold power lines) is in the box and fits perfectly.
Paragraph 4: What is DC power?
12. Blank 12: "Direct current (DC) power... is a linear electrical current-it moves in a _______ line." We need an adjective to describe the line. "straight" is in the box and contrasts with the "wave-like" motion of AC.
Reviewing the choices:
- Blank 1: Electricity
- Blank 2: direct
- Blank 3: essential
- Blank 4: apply
- Blank 5: standard
- Blank 6: defined
- Blank 7: positive
- Blank 8: caused (or generated, but 'caused' is in the box)
- Blank 9: spinning
- Blank 10: direction
- Blank 11: pylons
- Blank 12: straight
Let's double-check Blank 4 and 8.
- Blank 4: "what they apply to?" - This is a bit awkward. Is there another word? "used"? Not in the box. "caused"? "what they caused to?" No. "apply" is the best fit from the list.
- Blank 8: "this wave is caused when alternators..." - This works. "this wave is generated when..." would be better, but "generate" is in the box as a base verb. The worksheet might have a slight error, or expects "generated" from "generate". However, "caused" is also in the box and fits grammatically. Let's stick with "caused" as it's explicitly in the box in the correct form.
Wait, let's re-examine Blank 10. "the current changes _______". If I put "direction", it becomes "the current changes direction". This is correct. The word "direction" is in the box.
Let's re-examine Blank 1. "Electricity comes in two forms...". Yes, this is correct.
Let's re-examine Blank 12. "moves in a straight line". Yes, this is correct.
The solution seems solid. I will now format the final answer.
Final Answer:
Alternating and Direct current
Electricity comes in two forms-alternating current (AC) and direct current (DC). Both are essential to enable the functioning of our electronics, but do you know the difference between the two and what they apply to?
What is AC power?
Alternating current (AC) power is the standard electricity that comes out of power outlets and is defined as a flow of charge that exhibits a periodic change in direction.
AC's current flow changes between positive and negative because of electrons-electrical currents come from the flow of these electrons, which can move in either a positive (upward) or negative (downward) direction. This is known as the sinusoidal AC wave, and this wave is caused when alternators at power plants create AC power.
Alternators create AC power by spinning a wire loop inside a magnetic field. Waves of alternating current are made when the wire moves into areas of different magnetic polarity-for example, the current changes direction when the wire spins from one of the magnetic field's poles to the other. This wave-like motion means that AC power can travel farther than DC power, a huge advantage when it comes to delivering power to consumers via power pylons.
What is DC power?
Direct current (DC) power, as you may suss from the name, is a linear electrical current-it moves in a straight line.
Paragraph 1: Alternating and Direct current
1. Blank 1: The sentence says "_______ comes in two forms...". Looking at the word box, the word "Electricity" fits perfectly here because electricity is the general term for the two types mentioned (AC and DC).
2. Blank 2: The sentence lists the two forms: "alternating current (AC) and _______ current (DC)". The full name for DC is "Direct current". So, the word is "direct".
3. Blank 3: The sentence says "Both are _______ to enable the functioning of our electronics...". We need an adjective that means "necessary" or "very important". The word "essential" from the box fits this context perfectly.
4. Blank 4: The sentence ends with "...what they _______ to?". We need a verb that means "do". The word "apply" is in the box, but "do" isn't. Let's look at the context. It's asking what they apply to? Or perhaps what they are used for? Wait, looking at the word list again. Is there a better word? "apply" fits grammatically ("what they apply to"). Let's keep that in mind. Actually, looking closer at the sentence structure "do you know the difference between the two and what they _______ to?", the word "apply" makes sense here as in "what do they apply to?".
Paragraph 2: What is AC power?
5. Blank 5: "Alternating current (AC) power is the _______ electricity that comes out of power outlets...". We need an adjective to describe the electricity from outlets. "standard" is a good fit here, as AC is the standard form of electricity for homes.
6. Blank 6: "...and is _______ as a flow of charge that exhibits a periodic change in direction." We need a verb in the past participle form. "defined" fits well here. It is *defined* as a flow of charge...
7. Blank 7: "AC's current flow changes between _______ and negative...". The opposite of negative in electricity is "positive". This word is in the box.
8. Blank 8: "...this wave is _______ when alternators at power plants create AC power." We need a verb in the past participle form. Alternators *generate* or *create* power. The word "generated" is not in the box, but "generate" is. Wait, the sentence structure "this wave is [verb-ed]". Let's look for other words. "created"? Not in the box. "caused"? Maybe. Let's re-read. "this wave is _______ when alternators... create AC power." Perhaps "generated" is intended but the base form "generate" is in the box. Let's look for other options. Is there a word like "formed"? No. Let's look at the next paragraph for clues or come back. Actually, "generated" is the most logical, but since only "generate" is in the box, maybe the worksheet expects the student to conjugate it, or perhaps there's another word. Let's look at the word "caused". "this wave is caused when..." - that works grammatically. Let's tentatively choose "caused".
Paragraph 3: How AC is created
9. Blank 9: "Alternators create AC power by _______ a wire loop inside a magnetic field." We need a verb ending in -ing. The word "spinning" is in the box and describes the action of an alternator.
10. Blank 10: "...the current changes _______ when the wire spins from one of the magnetic field's poles to the other." We need an adverb or adjective describing the change. The word "direction" is in the box, but we need an adverb? No, "changes direction" is a common phrase. Wait, the blank is "changes _______". If the word is "direction", the sentence would be "the current changes direction". That makes perfect sense.
11. Blank 11: "This wave-like motion means that AC power can travel farther than DC power, a huge advantage when it comes to delivering power to consumers via power _______." We need a noun related to power delivery. "pylons" (the tall towers that hold power lines) is in the box and fits perfectly.
Paragraph 4: What is DC power?
12. Blank 12: "Direct current (DC) power... is a linear electrical current-it moves in a _______ line." We need an adjective to describe the line. "straight" is in the box and contrasts with the "wave-like" motion of AC.
Reviewing the choices:
- Blank 1: Electricity
- Blank 2: direct
- Blank 3: essential
- Blank 4: apply
- Blank 5: standard
- Blank 6: defined
- Blank 7: positive
- Blank 8: caused (or generated, but 'caused' is in the box)
- Blank 9: spinning
- Blank 10: direction
- Blank 11: pylons
- Blank 12: straight
Let's double-check Blank 4 and 8.
- Blank 4: "what they apply to?" - This is a bit awkward. Is there another word? "used"? Not in the box. "caused"? "what they caused to?" No. "apply" is the best fit from the list.
- Blank 8: "this wave is caused when alternators..." - This works. "this wave is generated when..." would be better, but "generate" is in the box as a base verb. The worksheet might have a slight error, or expects "generated" from "generate". However, "caused" is also in the box and fits grammatically. Let's stick with "caused" as it's explicitly in the box in the correct form.
Wait, let's re-examine Blank 10. "the current changes _______". If I put "direction", it becomes "the current changes direction". This is correct. The word "direction" is in the box.
Let's re-examine Blank 1. "Electricity comes in two forms...". Yes, this is correct.
Let's re-examine Blank 12. "moves in a straight line". Yes, this is correct.
The solution seems solid. I will now format the final answer.
Final Answer:
Alternating and Direct current
Electricity comes in two forms-alternating current (AC) and direct current (DC). Both are essential to enable the functioning of our electronics, but do you know the difference between the two and what they apply to?
What is AC power?
Alternating current (AC) power is the standard electricity that comes out of power outlets and is defined as a flow of charge that exhibits a periodic change in direction.
AC's current flow changes between positive and negative because of electrons-electrical currents come from the flow of these electrons, which can move in either a positive (upward) or negative (downward) direction. This is known as the sinusoidal AC wave, and this wave is caused when alternators at power plants create AC power.
Alternators create AC power by spinning a wire loop inside a magnetic field. Waves of alternating current are made when the wire moves into areas of different magnetic polarity-for example, the current changes direction when the wire spins from one of the magnetic field's poles to the other. This wave-like motion means that AC power can travel farther than DC power, a huge advantage when it comes to delivering power to consumers via power pylons.
What is DC power?
Direct current (DC) power, as you may suss from the name, is a linear electrical current-it moves in a straight line.
Parent Tip: Review the logic above to help your child master the concept of dc worksheet.
