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24:

Algebra · Linear inequalities in one or two variables · Easy

For a psychology class, a student's research paper needs to have no more than 5,000 words. If a student has already written 3,051 words, what is the maximum number of additional words the student can write for the research paper?

8,051

5,000

3,051

1,949

8,051

5,000

3,051

1,949

Question 12 of 28nothing graded until the end

Next Next

Your starting test

Math: starting test

23 of 28 correct

Estimated Math score range 610–770

Algebra6 of 7 this timeFirst measurement
Advanced Math6 of 7 this timeFirst measurement
Problem-Solving and Data Analysis5 of 7 this timeFirst measurement
Geometry and Trigonometry6 of 7 this timeFirst measurement

This is your first Math measurement. The next check-in will show which areas moved.

← All lessons

Reading

Words in context

Work out what a word means from the sentence around it, and choose the word that fits a blank exactly.

22 min read

Four moves for a word in context

1
Find the clue
Cover the word and read around it. Look for a contrast, a reason, an example or a restatement.
2
Say your own word
Before you look at the choices, think of a word that fits the gap or means the same.
3
Match your word
Choose the one closest in meaning to yours, even if it is not the meaning you know best.
4
Test it in the sentence
Read the whole sentence with your choice in place. It must keep the meaning and sound natural.

Rule

The sentence picks the meaning

A word does not have one meaning. It has several, and the sentence around it picks one. A choice can be a real meaning of the word and still be wrong here.

Try it yourself

“The new student was bright, and within a week her teacher was giving her harder work.” What does bright most nearly mean?

shiny

cheerful

clever

colorful

shiny

cheerful

clever

colorful

shiny

cheerful

clever

colorful

Check answerCheck answer

Correct — nice work.

Clever. The clue is what happens next: her teacher gave her harder work, which is what a teacher gives to a student who learns fast. The other three are real meanings of bright, but none of them explains the harder work.

Now try it

Practice the skill this lesson covers.

Words in Context →

← All topicsAdaptive practice

Mark for Review

Craft and Structure · Words in Context · Hard

In areas with mineral-rich water, mineral deposits may build up inside water heaters. If not treated or removed, these deposits can grow large enough to blank heat transfer, thereby undermining the main function of the devices.

Which choice completes the text with the most logical and precise word or phrase?

convert

require

isolate

impede

convert

require

isolate

impede

convert

require

isolateYour answer

impedeCorrect answer

Not quite — the answer is D.

Explanation

Choice D is the best answer. "Impede" means "to slow or obstruct the progress of something." The text explains that mineral deposits can build up inside water heaters and, if left untreated, can grow large enough to affect heat transfer, "thereby undermining the main function of the devices." Since a water heater's main function depends on heat transfer, deposits that obstruct that transfer would undermine the devices in exactly the way the text describes, so "impede" is the most logical and precise choice.

Still stuck? Ask Aidar

Change tutor

Why is it impede and not isolate?

The tell is the last phrase: "undermining the main function of the devices." A heater's main function depends on heat transfer. So the blank means: get in the way of heat transfer.

The trap is isolate. It sounds technical, so it feels right. But it means to set apart, and a process can't be set apart from a group. "Impede" means to slow or obstruct. Exact match.

So the clue is the last phrase?

Yes, that's the tell: "undermining the main function of the devices." The deposits get in the way of heat transfer, so the blank needs a word for slowing or blocking it. That's impede.

e.g. “Why is ‘however’ wrong here?”Why is it impede and not isolate?So the clue is the last phrase?

AskAsk

Enter to send · Shift + Enter for a new line

Question 4 of 123 of 3 correct so far3 of 4 correct so far

Check answerCheck answerNext question

Flashcards

Learn the words first, then prove you know them in the quiz.

Example

Flashcards Quiz

14 cards remaining13 cards remaining✓ 46 · ✗ 3✓ 47 · ✗ 3

Ubiquitous

adjective

Tap to reveal the definition

Ubiquitous

Present, appearing, or found everywhere

“Smartphones have become ubiquitous in modern classrooms.”

Pragmatic

adjective

Tap to reveal the definition

Pragmatic

Dealing with things sensibly and realistically

“She took a pragmatic approach, focusing on what could actually be accomplished.”

Think of the definition, then flip the card.

✗ Didn't know it✓ Knew it

A starting test finds your level.
A timed test for each section that resembles the real exam. It shows where you stand in every area of the SAT.
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DashboardPracticeAnalyticsHistoryLessonsFlashcardsSettings
Mark for Review
24:
Algebra · Linear inequalities in one or two variables · Easy
For a psychology class, a student's research paper needs to have no more than 5,000 words. If a student has already written 3,051 words, what is the maximum number of additional words the student can write for the research paper?
Option A.8,051
Option B.5,000
Option C.3,051
Option D.1,949
Option A.8,051
Option B.5,000
Option C.3,051
Option D.1,949
Question 12 of 28nothing graded until the end
Next Next
Your starting test
Math: starting test
23 of 28 correct
Estimated Math score range 610–770
Algebra6 of 7 this timeFirst measurement
Advanced Math6 of 7 this timeFirst measurement
Problem-Solving and Data Analysis5 of 7 this timeFirst measurement
Geometry and Trigonometry6 of 7 this timeFirst measurement
This is your first Math measurement. The next check-in will show which areas moved.
Lessons teach the strategy.
Interactive lessons, each built around a method that works on the real test: the steps, the rule, the traps, and quick checks as you read. Each one ends in practice on its skill.
PlusPoint
DashboardPracticeAnalyticsHistoryLessonsFlashcardsSettings
← All lessons
Reading
Words in context
Work out what a word means from the sentence around it, and choose the word that fits a blank exactly.
22 min read
Four moves for a word in context
1
Find the clue
Cover the word and read around it. Look for a contrast, a reason, an example or a restatement.
2
Say your own word
Before you look at the choices, think of a word that fits the gap or means the same.
3
Match your word
Choose the one closest in meaning to yours, even if it is not the meaning you know best.
4
Test it in the sentence
Read the whole sentence with your choice in place. It must keep the meaning and sound natural.
Rule
The sentence picks the meaning
A word does not have one meaning. It has several, and the sentence around it picks one. A choice can be a real meaning of the word and still be wrong here.
Try it yourself
“The new student was bright, and within a week her teacher was giving her harder work.” What does bright most nearly mean?
shiny
cheerful
clever
colorful
shiny
cheerful
clever
colorful
shiny
cheerful
clever
colorful
Check answerCheck answer
Correct — nice work.
Clever. The clue is what happens next: her teacher gave her harder work, which is what a teacher gives to a student who learns fast. The other three are real meanings of bright, but none of them explains the harder work.
Now try it
Practice the skill this lesson covers.
Words in Context →
Practice like the real SAT with questions picked specifically for you.
More than 6,500 questions written like the real test. Adaptive practice serves the skills where you are weakest right now, and every answer comes with a full explanation.
← All topicsAdaptive practice
Mark for Review
Craft and Structure · Words in Context · Hard
In areas with mineral-rich water, mineral deposits may build up inside water heaters. If not treated or removed, these deposits can grow large enough to blank heat transfer, thereby undermining the main function of the devices.
Which choice completes the text with the most logical and precise word or phrase?
Option A.convert
Option B.require
Option C.isolate
Option D.impede
Option A.convert
Option B.require
Option C.isolate
Option D.impede
Option A.convert
Option B.require
Option C.isolateYour answer
Option D.impedeCorrect answer
Not quite — the answer is D.
Explanation
Choice D is the best answer. "Impede" means "to slow or obstruct the progress of something." The text explains that mineral deposits can build up inside water heaters and, if left untreated, can grow large enough to affect heat transfer, "thereby undermining the main function of the devices." Since a water heater's main function depends on heat transfer, deposits that obstruct that transfer would undermine the devices in exactly the way the text describes, so "impede" is the most logical and precise choice.
Still stuck? Ask Aidar
Change tutor
e.g. “Why is ‘however’ wrong here?”
Ask
Enter to send · Shift + Enter for a new line
Question 4 of 123 of 3 correct so far3 of 4 correct so far
Check answerCheck answerNext question
Ask the tutor anything, in any amount, and any time you want!
Say your question out loud or type it, at midnight or five times in a row. The tutor trained specifically for answering SAT questions never gets tired of you and can answer with any of the 6 voices you choose.
Choice A is incorrect because "convert" means "to change into a different form." The text describes deposits that interfere with heat transfer, not deposits that change heat transfer into something else. Choice B is incorrect because "require" means "to have need of." Deposits that need heat transfer wouldn't undermine the main function of a water heater, so this choice doesn't fit the consequence the text describes. Choice C is incorrect because "isolate" means "to set apart from others." Heat transfer is a process rather than something that can be set apart from a group, and this choice wouldn't convey the interference with the devices' functioning that the text describes.
Still stuck? Ask Aidar
Change tutor
Why is it impede and not isolate?
The tell is the last phrase: "undermining the main function of the devices." A heater's main function depends on heat transfer. So the blank means: get in the way of heat transfer.
The trap is isolate. It sounds technical, so it feels right. But it means to set apart, and a process can't be set apart from a group. "Impede" means to slow or obstruct. Exact match.
So the clue is the last phrase?
Yes, that's the tell: "undermining the main function of the devices." The deposits get in the way of heat transfer, so the blank needs a word for slowing or blocking it. That's impede.
e.g. “Why is ‘however’ wrong here?”Why is it impede and not isolate?So the clue is the last phrase?
AskAsk
Enter to send · Shift + Enter for a new line
Learn the words the SAT uses.
Flashcards and quizzes with the words that come up in SAT passages. Words you miss come back sooner; words you know come back later.
Flashcards
Learn the words first, then prove you know them in the quiz.
Example
Flashcards Quiz
14 cards remaining13 cards remaining✓ 46 · ✗ 3✓ 47 · ✗ 3
Ubiquitous
adjective
Tap to reveal the definition
Ubiquitous
Present, appearing, or found everywhere
“Smartphones have become ubiquitous in modern classrooms.”
Pragmatic
adjective
Tap to reveal the definition
Pragmatic
Dealing with things sensibly and realistically
“She took a pragmatic approach, focusing on what could actually be accomplished.”
Think of the definition, then flip the card.
✗ Didn't know it✓ Knew it
Every 10 days, a check-in shows what moved.
A short timed test shows which areas got stronger, updates your range, and points your practice at what is still weak.
Start for free
PlusPoint
DashboardPracticeAnalyticsHistoryLessonsFlashcardsSettings
Your check-in, day 50
Math check-in
19 of 20 correct
Estimated Math score range 760–790
Algebra5 of 5 this timeStronger
Advanced Math5 of 5 this timeStronger
Problem-Solving and Data Analysis4 of 5 this timeStronger
Geometry and Trigonometry5 of 5 this timeStronger

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Question 4 · Craft and Structure · Words in Context

Example

Why is it impede and not isolate?

Aidar · The Strategist: calm, sharp, spots the traps.

The tell is the last phrase: "undermining the main function of the devices." A heater's main function depends on heat transfer. So the blank means: get in the way of heat transfer.

The trap is isolate. It sounds technical, so it feels right. But it means to set apart, and a process can't be set apart from a group. "Impede" means to slow or obstruct. Exact match.

Aibek · The Homie: casual, warm, hypes you up.

No worries, this one's lowkey tricky. The clue is hiding at the very end: "undermining the main function of the devices." A heater's whole job runs on heat transfer, so those deposits have to be getting in its way. "Impede" means to slow down or block something. That's your word.

Isolate sounds smart, I get it, but it means setting something apart, and you can't set a process apart from a group. You got this.

AkylAi · The Professor: precise, formal, explains the why.

Consider what the sentence demands. The deposits undermine the heater's main function, and that function depends on heat transfer, so the missing verb must describe interfering with the transfer. "Impede", to slow or obstruct, does precisely that.

"Isolate" fails on logic rather than vocabulary: it means to set apart from others, and heat transfer is a process. One cannot set a process apart from a group, however tidy the word sounds.

Aigul · The Big Sister: patient, gentle, reassuring.

Lots of students mix this one up, so please don't worry. Let's go one small step at a time. The sentence says the deposits end up "undermining the main function of the devices." A water heater's main job depends on heat transfer, so the blank is about getting in the way of it.

"Impede" means to slow or obstruct, so it fits. Isolate means to set apart from others, and heat transfer is a process, so it can't be set apart. Does that make sense?

Aizada · The Cheerleader: bubbly, high-energy, all encouragement.

Ooh, great question, you're so close! The secret is the end of the sentence: "undermining the main function of the devices." Heaters need heat transfer to do their job, so the deposits must be getting in its way. "Impede" means to slow or obstruct. YES, that's the one!

Isolate means to set apart from others, and heat transfer is a process, so you can't set it apart. You've totally got the next one!

Aidos · The Storyteller: explains with everyday examples.

Picture a straw slowly clogging up: you can still sip, but less gets through. That's what the deposits do here, and the sentence says it ends up "undermining the main function of the devices." A heater's main function depends on heat transfer, so the word you want means slowing or blocking it: "impede".

Isolate is setting something apart, like moving one friend out of a group chat. Heat transfer is a process, and a process can't be set apart like that.

Just the answer · No persona: clean, neutral, straight to the explanation.

The clue is at the end of the sentence: the deposits end up "undermining the main function of the devices." A water heater's main function depends on heat transfer, so the blank needs a word for getting in its way. "Impede" means to slow or obstruct, which fits exactly.

Isolate doesn't work because it means to set apart from others, and heat transfer is a process, not something you can set apart from a group.

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Digital SAT prep that gets you the most points.

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Math: starting test

Lessons teach the strategy.

Practice like the real SAT with questions picked specifically for you.

Ask the tutor anything, in any amount, and any time you want!

Learn the words the SAT uses.

Every 10 days, a check-in shows what moved.

Math check-in

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