Main-Idea Radar
What is the main idea?
Maya visited the library to research volcanoes. She borrowed three books and used an encyclopaedia to take notes for her science project.
Maya researched volcanoes at the library for a science project.
A text explains how elephants communicate. Which detail should be removed from its summary?
A. Elephants use low-frequency sounds.
B. They communicate across long distances.
C. One elephant at the zoo is called Daisy.
D. They also communicate through movement.
C — One elephant at the zoo is called Daisy.
Paraphrase:
“The match was cancelled because of heavy rain.”
The game was called off due to severe rainfall.
What is wrong with this summary?
“I think the character made a ridiculous decision to leave home.”
It includes the summariser’s personal opinion rather than remaining objective.
Summarise in one sentence:
“Bees carry pollen between flowers. This allows plants to reproduce and produce fruits and seeds. Without bees, many crops would become more difficult to grow.”
Bees pollinate plants and are essential to the production of many crops.
What is the main idea?
The school installed water fountains, gave students reusable bottles and stopped selling single-use plastic bottles.
⚡ Lightning Bonus Effect: Answer correctly within 15 seconds to earn 100 extra points.
The school introduced measures to reduce plastic waste.
A text describes the dangers of dehydration. Choose the two essential details:
A. Water bottles come in many colours.
B. Dehydration can cause tiredness and dizziness.
C. Drinking sufficient water helps prevent dehydration.
D. Some people prefer cold water.
🛡️ Summary Shield effect: Answer within ten seconds to gain a shield that blocks one future point-stealing effect.
B and C.
Paraphrase without using the words children, enjoyed or enormous:
“The children enjoyed exploring the enormous museum.”
🔄 Synonym Sprint effect: A correct answer within 10 seconds earns 100 extra points.
The young visitors had fun exploring the very large museum.
Remove the repetition:
“The team worked cooperatively as a group to complete the project together.”
✂️ Editing Bonus effect: Reduce it to 10 words or fewer to earn 100 extra points.
The team worked together to complete the project.
Summarise in 15 words or fewer:
“During the power cut, traffic lights stopped working, shops closed early and residents used torches and candles until electricity returned.”
⏳ Beat the Clock effect: A correct answer within 30 seconds earns 500 extra points.
A power cut disrupted transport, businesses and homes until electricity was restored.
What is the main idea?
Although the storm damaged several houses and blocked the roads, local volunteers distributed food, cleared fallen branches and provided temporary shelter.
Local volunteers helped the community recover from storm damage.
A biography explains that an inventor failed repeatedly before producing a successful machine. Should a summary include the dates of all failed experiments? Why or why not?
No. The repeated failures are relevant, but every date is unnecessary detail.
Combine these ideas into one sentence:
“The train was delayed. There was a mechanical problem. Hundreds of passengers arrived late.”
A mechanical problem delayed the train, causing hundreds of passengers to arrive late.
What important information is missing?
Original idea: “The factory closed last summer because demand had fallen below the minimum required, which made 200 workers go back to their homes with no job.”
Summary: “Last summer, two hundred workers became unemployed.”
The factory closed due to low demand.
Combine the information from both sources:
Online learning offers flexibility, but unreliable internet can prevent some students from benefiting.
Summarise the main idea in no more than twelve words:
Many teenagers sleep fewer than eight hours because of homework, screen time and early school schedules. Insufficient sleep can affect concentration, mood and physical health.
🎯 Precision Bonus effect: If the answer contains ten words or fewer, earn 200 extra points.
Insufficient sleep can negatively affect teenagers’ health and concentration.
Identify the two unnecessary details in this summary:
“After weeks of heavy rain, the river flooded the village on Tuesday morning. The mayor ordered an evacuation while wearing his trusty old raincoat. Within an hour, all residents had moved to a shelter beside a yellow supermarket.”
🕵️ Detail Thief effect: Identify both within 10 seconds to steal 300 points from the leading team (or the one in second place).
The mayor’s trusty old raincoat and the supermarket’s colour are unnecessary.
Summarise in one sentence:
“Rena practised the violin every evening. At first, her playing was uneven, and she often made mistakes. However, after several months, she performed confidently in the school concert.”
🎰 Double or Trouble effect: Before answering, you may activate Double or Nothing. A clear summary written entirely in your own words earns 800 points; an inaccurate answer loses 400 points.
Regular practice helped Rena improve her violin playing and perform confidently.
Find the factual error:
Original: “After the council introduced a small fee for plastic bags in the local supermarkets, their use fell by 60%.”
Summary: “The council introduced a fee for plastic bags, reducing purchases in supermarkets by 60%.”
🚨 Error Alarm effect: Explain how the error changes the meaning to remove 200 points from another team of your choice.
Purchases did not fall; fewer plastic bags were used.
Summarise the following in one objective sentence:
“The new park attracted many visitors and created space for exercise. However, nearby residents complained about noise, traffic and litter during weekends.”
👑 Summary Crown effect: If the response includes both perspectives, remains objective and contains 20 words or fewer, the team may swap their points with another team.
The new park provides recreational benefits but has also caused problems for nearby residents.
What central idea connects all these details?
Some cities are creating rooftop gardens. These provide fresh produce, reduce building temperatures, absorb rainwater and create habitats for insects.
Rooftop gardens provide cities with several environmental and practical benefits.
A four-paragraph article discusses the causes, effects and possible solutions to air pollution. A student’s summary lists what brought about pollution in three cities and how to solve the problem. What essential information is missing?
The effects of air pollution.
Paraphrase this idea without changing its meaning:
“While artificial intelligence can increase workplace efficiency, it may also replace certain jobs and require workers to develop new skills.”
AI can make work more efficient, but it may eliminate some jobs and force employees to learn new skills.
Repair this weak summary:
“The article is about exercise. Exercise is good for your health. It mentions running, swimming, cycling, football, basketball, tennis and walking. I personally prefer swimming.”
The article explains that different forms of regular exercise can improve health.
It should remove the list, repetition and personal opinion.
Summarise the following passage in 25 words or fewer:
“After coral reefs near the island began dying, scientists linked the damage to rising sea temperatures and water pollution. The government established protected areas, restricted waste disposal and worked with fishing communities to restore the reefs. Early surveys show some improvement, although full recovery may take decades.”
🔥 Final Fusion effect: A summary that includes the problem, response and limitation within 30 seconds earns double points.
The government and fishing communities are restoring coral reefs damaged by warming and pollution, but complete recovery may take decades.