New here? Just sign up with Google — your account includes Matilda, our gift book, forever.
The Sea of Monsters · Garden Heights
Part 2
for The Sea of Monsters · Part 2 · Chapters 4–5
8 Parts40 min
What Happens in Part 2
Part 2 drops Percy, Annabeth, and Tyson straight into a battle. Two enormous bronze bulls have crossed the weakened border and are burning Half-Blood Hill, where Clarisse La Rue is holding the Ares cabin in a shield formation. Thalia’s pine, poisoned, is visibly dying above the fight. Percy pulls Annabeth clear of a charge, and Tyson — untouched by fire — stops the second bull and ends the attack; the Mist can no longer hide that he is a Cyclops. At the dining pavilion the losses continue. Chiron has been dismissed because his father is Kronos and the council suspects him of poisoning the tree, and Mr. D presents his replacement: Tantalus, a spirit from the Fields of Punishment whose food slides away whenever he reaches for it. Camp rules turn harsh. Chiron says goodbye. Then Poseidon claims Tyson with a glowing trident, and Percy, who has just been saved by him, has to admit in front of everyone that this Cyclops is his brother.
Rising action, situational irony, and a symbol that identifies a character
Cross-Curricular
Ocean currents and gyres: the rivers that run inside the sea
Chapter Summary
Ch.
What happens
Ch.4
Fire on Half-Blood Hill — the three arrive to find Camp Half-Blood already under attack. Two enormous bronze bulls have come through the weakened border and are burning the hillside while Clarisse La Rue holds the Ares cabin together in a locked-shield formation. Thalia’s pine is visibly sick. Percy fights one bull and pulls Annabeth clear when she is knocked down, and Tyson wades into the flames untouched, takes hold of a charging bull, and ends the attack. Fire cannot mark Tyson because he is a Cyclops, something the campers can see once the Mist stops hiding it.
Ch.5
A New Cabin Mate — at the dining pavilion Percy learns that Chiron has been dismissed. Because Chiron’s father is Kronos, the council suspects him of poisoning the tree, and Mr. D introduces the replacement activities director: Tantalus, a spirit brought up from the Fields of Punishment, whose ancient curse makes food and drink slide away before he can reach them. Tantalus rewards obedience and punishes complaint, and camp discipline turns harsh. Chiron says goodbye to Percy and tells him to trust himself. Then a glowing trident appears above Tyson: Poseidon has claimed him, he moves into cabin three, and Percy has to face the fact that this Cyclops is his half-brother.
Part 1
Vocabulary
Study 10 key words from Chapters 4–5, then answer each question.
🌊Knowledge Bank · The Words for Water That Moves
Language · Terms of Ocean MotionOcean motion has its own vocabulary, and the terms are not interchangeable. A current is a continuous, directed flow of water that keeps roughly the same path over long periods. A gyre is a very large system of currents that has closed into a rotating loop across an entire ocean basin. An eddy is a smaller spinning parcel of water that peels away from a main current, sometimes hundreds of kilometers across and lasting for months. Upwelling describes deep water rising toward the surface, usually along a coast where wind pushes the surface layer aside, carrying nutrients that support enormous fisheries. Drift is the slow travel of a floating object under the combined push of current and wind, which is why a bottle released off Japan can reach Alaska. Tide is separate again: a rise and fall of the whole sea surface caused by the moon and sun. Choosing the right term tells a listener the scale, the cause, and the duration.
rampagen.Ch.4
A period of wild, violent, destructive behavior
“The bulls go on a rampage across the burning hillside.”
breachv.Ch.4
To break through a wall, border, or defense
“Monsters can breach the boundary now that the tree is failing.”
formationn.Ch.4
An arranged pattern in which a group takes up position
“Clarisse holds her cabin in a tight shield formation.”
imperviousadj.Ch.4
Unable to be harmed or penetrated by something
“Tyson appears impervious to flames that scorch the grass.”
witherv.Ch.4
To dry up and lose strength or freshness
“The poisoned pine begins to wither where everyone can see it.”
dismissv.Ch.5
To remove someone from a job or position
“The council votes to dismiss Chiron without hearing much evidence.”
suspicionn.Ch.5
A belief that someone has done wrong, held without proof
“Suspicion falls on Chiron because of who his father is.”
eternaladj.Ch.5
Lasting forever, without any end
“Tantalus was given an eternal punishment long before this summer.”
acknowledgev.Ch.5
To admit or accept publicly that something is true
“Percy is slow to acknowledge the brother standing beside him.”
kinshipn.Ch.5
The relationship between members of the same family
“The trident announces a kinship Percy did not expect.”
ⓘ The vocabulary words in this list are selected to help you understand and complete this workbook. Some may not appear verbatim in the original novel.
1To break through a wall or a defense is to ___ it.Ch.4
2‘Impervious’ means easily damaged by heat, water, or pressure.Ch.4
3A plant that dries up and loses its strength begins to ___.Ch.4
4Fill in each blank with the correct word.Ch.4
Word choices:formationrampagebreachwither- some words will not be used
The Ares cabin locks shields into a tight .
Two bronze bulls go on a across the hill.
5‘Dismiss’ can mean to remove a person from a position of responsibility.Ch.5
6A belief that someone has done wrong, held without proof, is ___.Ch.5
7‘Eternal’ describes something that lasts for only a short season.Ch.5
8Fill in each blank with the correct word.Ch.5
Word choices:eternalacknowledgekinshipsuspicion- some words will not be used
Tantalus is serving an punishment.
Percy is slow to his brother in public.
9The family connection between Percy and Tyson is their ___.Ch.5
10Something that fire cannot damage is ___ to it.Ch.4
Part 2
Comprehension
Show you understood what happens in Chapters 4–5.
🌌Knowledge Bank · How a Gyre Turns
Oceanography · Surface CirculationA gyre begins with wind. Steady belts of wind — the trade winds near the equator and the westerlies farther north and south — drag on the ocean surface and set the top layer moving. Because the planet rotates, moving water is deflected, an effect named for Gaspard-Gustave Coriolis: to the right in the Northern Hemisphere and to the left in the Southern. That deflection curves each wind-driven flow until it meets a continent, turns along the coast, and eventually closes a loop. Five major gyres result, two in the Pacific, two in the Atlantic, and one in the Indian Ocean. The loops are not symmetrical. On the western side of a basin the current becomes narrow, deep, and fast, producing western boundary currents such as the Gulf Stream and the Kuroshio, while the return flow on the eastern side is broad, shallow, and slow. The middle of each loop stays comparatively calm, which is why a gyre both moves water and traps.
1What is attacking Camp Half-Blood when Percy arrives?Ch.4
2The camp’s magical border stops the attackers before they reach the hill.Ch.4
3How does Clarisse organize the Ares cabin against the bulls?Ch.4
4What does Tyson’s survival in the flames reveal about him?Ch.4
5Write the numbers 1–5 in the boxes to show the correct order of events in Chapters 4–5. Number 1 = what happens first.Ch.4–5
Clarisse holds the Ares cabin in a line of locked shields.
A glowing trident marks Tyson as a son of Poseidon.
Tantalus is introduced as the new activities director.
Tyson stops a charging bronze bull without being burned.
Percy, Annabeth, and Tyson reach a hill that is already on fire.
6Chiron leaves the camp after admitting that he poisoned the tree.Ch.5
7Why does the council suspect Chiron of poisoning the tree?Ch.5
8What makes Tantalus an unusual choice as director?Ch.5
9Percy is immediately proud to share cabin three with Tyson.Ch.5
10What does the glowing trident above Tyson mean?Ch.5
Part 3
Literary Elements
Understanding HOW and WHY Rick Riordan tells the story across Chapters 4–5.
📚Knowledge Bank · The Shape of a Voyage Story
Literary Craft · Structure and IronyPart 2 is rising action: the stretch of a story in which pressure increases before the central journey begins. Riordan applies that pressure from several directions at once. The border fails, the trusted mentor is removed, a punished spirit takes charge of the camp, and the character Percy is least willing to claim publicly turns out to be his brother. That last turn is situational irony, a result that reverses what everyone expected. The campers look down on Tyson and then survive because of him. Percy hopes for a quest and receives a family problem instead. Voyage narratives have used this arrangement since the Odyssey, because a hero who leaves home comfortable has very little to lose at sea. The story therefore takes away the safe harbor before it puts anyone on the water. Every protection in these two chapters is weakened deliberately, and the direction the plot has already chosen is outward.
Rising action
Riordan removes one protection after another — the border, then Chiron, then Percy’s comfort — so pressure builds before the voyage begins.
Situational irony
The camp scorns Tyson and is then saved by him; Percy wants glory and receives a brother he is embarrassed to claim.
Symbol
The glowing trident above Tyson and the yellowing pine on the hill both turn an idea into an image a reader can see at a glance.
1Poseidon’s claiming of Tyson mainly creates ___.Ch.5
2Fill in each blank with the correct literary term.Ch.4–5
Word choices:symbolironysonnetsimile- some words will not be used
An object that stands for a larger idea is a .
An outcome opposite to what was expected creates .
3Why is it ironic that Tyson is the one who stops the bulls?Ch.4
4Rising action refers to the events that build tension before a story’s climax.Ch.4–5
5What does the dying pine tree stand for in these chapters?Ch.4
6Chiron’s dismissal advances the plot mainly by ___.Ch.5
7Tantalus is presented as a fair replacement who improves life at camp.Ch.5
8Fill in each blank with the correct literary term.Ch.4–5
Word choices:conflicttensionrhythmchorus- some words will not be used
A struggle inside a character is an internal .
Rising action steadily builds .
9Situational irony depends on an outcome that differs from what was expected.Ch.4–5
10How does the novel present Percy’s shame about Tyson?Ch.5
Part 4
Think Deeper
Four deeper challenges — no single-word recall. Read, weigh the evidence, and reason it out.
🔍Knowledge Bank · Reading a Pattern Before You Can Explain It
Critical Thinking · Observation and TheoryPolynesian navigators, Arab traders, and North Atlantic whalers all used ocean currents for centuries with no theory of planetary rotation. They had something else: a long record of what happened. Repeated voyages produce observation, and observation can reveal a dependable pattern well before anyone can say why the pattern exists. Whaling captains could find the edge of the Gulf Stream by the color and the temperature of the water, and they used it to shorten a crossing. Explanation arrived later, and it supplied something observation alone could not: the ability to predict a case nobody had ever sailed. That is the practical difference between a rule of thumb and a theory. A rule of thumb repeats what has worked before; a theory says what should happen in a situation never tried. Both are valuable, and confusing them is a common mistake. Experience is strong evidence about the past and weak evidence about anything genuinely new.
Think back over these chapters. The taxi pulls away and the hill is already burning, with two bronze bulls loose inside a border that should have stopped them. Clarisse holds a line of shields together while the pine that protects everything turns yellow above her. Percy fights, drags Annabeth out of the way, and then watches the boy from school walk into the flames as though they were warm air. The camp learns what Tyson is in the same moment it learns it has been saved by him. At dinner the news gets worse: Chiron is gone, suspected because of his father, and a cursed spirit is now in charge of the camp. Then the trident lights up over Tyson’s head, and Percy discovers that the hardest thing in the chapter is not a bull.
Original passage written for Garden Heights — not a quotation from the novel.
1Claim: “Ocean currents behave like rivers running inside the sea rather than like water drifting at random.” — choose the two details that best prove it.Claim & Evidence
2Wind-driven surface current, or Deep thermohaline circulation? Tap each detail to send it left or right.Sort into two
3Match each cause to its result. For each cause, pick its result.Cause & Effect
Wind blows steadily across the ocean surface→
Earth’s rotation deflects the moving water→
Curving currents meet continents and close a loop→
Floating material drifts toward that calm center→
4Fill both blanks to complete the reasoning.Build the Argument
Sailing crews could use ocean currents long before science explained them because , which shows that .
Part 5
Standardized Test
Reading passage · Rivers in the Sea · Central Ideas & Prose Summary · SAT & TOEFL-style practice
🎯 What this section practices
You already have these skills from the sections above — here they appear in the exact question types the SAT and TOEFL use. Read the passage (the highlighted words are tested below), then answer. Tap an answer to select it, then tap it again to confirm — you can change your choice until you confirm.
SATCentral Ideas — the main point of the passage as a whole
TOEFLFactual Information×2 — a fact stated directly in the passage
SATWords in Context×2 — what a word means the way this passage uses it
TOEFLVocabulary — the meaning of a tested word as this passage uses it
SATCommand of Evidence — which detail best supports a given claim
TOEFLProse Summary — choosing the three sentences that capture the main ideas
SATInference — a conclusion the passage supports without ever stating it outright
SATAuthor’s Purpose — what the author is trying to accomplish by writing this
Seawater is never still. Wind dragging across the surface pushes the top layer forward, and the rotation of Earth bends that motion to the right north of the equator and to the left south of it. The result is a set of steady flows that behave less like scattered ripples and more like rivers running inside the ocean. The Gulf Stream carries warm tropical water up the American coast and out toward Europe at a pace no swimmer could match.
Because that bending is consistent, the major surface currents close into enormous loops called gyres. Five of them turn in the Atlantic, Pacific, and Indian Oceans, clockwise in the north and counterclockwise in the south. Along the western side of each ocean basin the flow narrows and speeds up; along the eastern side it spreads out and slows. Sailing crews mapped these patterns centuries before anyone could explain them, riding one current outbound and a different one home. A captain who ignored the prevailing flow could add weeks to a voyage.
A gyre also gathers whatever floats. Water spiraling toward a calm center carries drifting seaweed, driftwood, and, in the modern ocean, plastic that continues to accumulate far from any coast. Below the surface a second system moves for different reasons: cold, salty water sinks near the poles and creeps along the seafloor, returning to the surface only after hundreds of years. Together the two systems redistribute heat, oxygen, and nutrients across the planet. Weather, fisheries, and shipping routes all depend on water that is quietly going somewhere.
Original passage written for Garden Heights — not a quotation from the novel.
1What is the main idea of the passage?SAT · Central Ideas
2According to the passage, what bends the moving surface water?TOEFL · Factual Information
3In the second paragraph, prevailing most nearly means ___.SAT · Words in Context
4What does the passage say happens on the western side of an ocean basin?TOEFL · Factual Information
5The word accumulate in the passage means that plastic ___.TOEFL · Vocabulary
6Which detail best supports the claim that currents are predictable?SAT · Command of Evidence
7In the third paragraph, redistribute most nearly means ___.SAT · Words in Context
8Prose Summary (TOEFL).The passage explains how large-scale ocean currents form and why they matter. This TOEFL task lists six sentences; choose the THREE that best capture the passage’s main ideas. The other three do not belong — they state minor details or ideas the passage does not present.TOEFL · Prose Summary
9What can be inferred about a route that ignores the prevailing flow?SAT · Inference
10Why does the author mention weather, fisheries, and shipping at the end?SAT · Author’s Purpose
Part 6 · Optional
Creative Writing
A bonus challenge to practice your English. Take your time and have fun with it.
About This Section
This writing task is optional and is not part of your auto-graded score. The feedback below checks only the basics — length, spelling, and grammar — not whether your ideas are right or wrong. It is meant for classroom discussion and creative practice, so feel free to use your imagination!
Writing Task — Part 2 “Something Carried a Long Way”
A gyre can carry a floating object thousands of miles from where it entered the water. Imagine one object — a sandal, a crate, a message in a bottle — dropped into the sea and picked up by a current. Trace its journey: where it started, which forces moved it, what it passed, and who finds it in the end. Use at least three accurate ideas from this part, such as wind, rotation, a gyre, or a calm center. Write 6–10 sentences. End with what the finder decides to do with it.
You can start with: “Nobody meant to send it anywhere, but...”
0 / 40 words minimum
🗣 Teach It · Just for Fun (optional)
No right or wrong — close the screen and tell someone nearby what happened in this part. Can’t find anyone? Tell yourself out loud. The moment you teach it, you truly understand it.
Part 2 Complete!
You finished Chapters 4–5 of The Sea of Monsters.
Here are your auto-graded results:
-
points out of 100
Your Writing
Your writing was checked automatically for length, spelling, grammar, and whether you included the key parts of the scene. Scroll back to Part 5 anytime to read your feedback and improve your work.
Independent study guide by Garden Heights. Not affiliated with or endorsed by Rick Riordan. Contains original analysis only; no text from the novel is reproduced. Reference text: This workbook follows Rick Riordan’s classic text (the standard Puffin edition sold worldwide). Revised 2023 UK editions change some wording and may not match the vocabulary studied here.
