Challenger App

No.1 PSC Learning App

1M+ Downloads
What word is a synonym for "captivated" as used in the first paragraph?
What event marked the beginning of the space age?
Find an antonym for "accessible" as used in the passage.
What does "intermittency" refer to in the context of renewable energy?
Which form of renewable energy is still in the experimental stages?
What is one of the main benefits of solar energy mentioned in the passage?
Which of the following is a synonym for "replenished" as used in the passage?
What cultural and recreational values does biodiversity contribute to, according to the passage?
Which word from the passage is an antonym of "decline"?
Which term from the passage means 'variety of life on Earth'?
What potential benefit of biodiversity is highlighted in relation to medical discoveries?
Find a synonym for the word "mitigate" as used in the passage.
Which of the following human activities is NOT mentioned as a threat to biodiversity in the passage?
What does the word "resilient" most likely mean in the context of the passage?
What are some of the essential services provided by ecosystems mentioned in the passage?
Which region is highlighted in the passage as one of the most biodiverse on the planet?
Which technological innovation contributed to the growth of industrial capitalism during the 19th century?
What was a significant consequence of the mass migration to urban centers during the Industrial Revolution?
What term refers to the shift from agrarian economies to industrial economies during the Industrial Revolution?
What industry was one of the first to undergo mechanization during the Industrial Revolution?
Who is credited with developing the steam engine during the Industrial Revolution?
What are some challenges faced by electric cars despite their benefits?
When did Tesla introduce the Roadster, and what was significant about it?
Which company played a key role in the modern electric car revolution, and who was its founder?
What is one significant advantage of electric cars over traditional gasoline-powered cars?
What was one of the primary reasons for the renewed interest in electric cars in the early 21st century?
What was inside the small, rusted metal box?
Where did the friends find the hidden box?
What did the final entries in Mr. Thompson’s diary mention?
What did the friends find in the old office on the second floor?
Why did Sam, Alex, and Mia decide to explore the old mill?
What did Lucy do after finding the book?
Where did Lucy eventually find "The Magical Garden"?
Who did Lucy first ask about the missing book?
What was unusual about the book's absence?
Why did Lucy go to the library?
What did Mrs. Parker do to ensure Whiskers' safety after the incident?
How did Mrs. Parker finally find Whiskers?
Where did the Collins children last see Whiskers?
Who were the first people Mrs. Parker asked about Whiskers' whereabouts?
What was the first sign that something was wrong with Whiskers?
Where did the children ultimately find Mrs. Thompson’s necklace?
What did the children find caught in the wooden slats of the ring toss booth?
Where did the children find the first clue about the necklace's whereabouts?
Who helped Mrs. Thompson find her missing necklace?
Why was Mrs. Thompson at the town fair?
What was the title of the book they found?
What did the friends discover at the end of the tunnel?
What was the tunnel like inside?
How did the friends find the entrance to the secret tunnel?