Plant Kingdom Facts
1 / 15Fascinating facts about plants and trees
15 quick questionsNo sign-upFree to playTap an answer below to begin ↓
What is the tallest species of tree in the world?
About Plant Kingdom Facts
Give your memory a workout with Plant Kingdom Facts: 15 multiple-choice questions with a mix of 6 medium, 6 easy, 3 hard questions, free to play right in your browser. Fascinating facts about plants and trees Expect to spend about 7 minutes; every question comes with an explanation, so you learn something even when you miss.
A few sample questions
1. What is the tallest species of tree in the world?
Answer: Coast redwood
Coast redwoods (Sequoia sempervirens) are the tallest trees on Earth. The tallest known specimen, named Hyperion, stands at over 380 feet (116 meters) in California.
2. Which plant is known for having the largest flower in the world?
Answer: Rafflesia arnoldii
Rafflesia arnoldii produces the largest individual flower, measuring up to 3 feet (1 meter) across and weighing up to 24 pounds. It is found in the rainforests of Southeast Asia.
3. Approximately how old is the oldest known living tree, a bristlecone pine named Methuselah?
Answer: About 4,850 years
Methuselah, a Great Basin bristlecone pine in California's White Mountains, is approximately 4,850 years old, making it one of the oldest known living organisms on Earth.
4. What gas do plants primarily absorb from the atmosphere during photosynthesis?
Answer: Carbon dioxide
Plants absorb carbon dioxide (CO2) from the atmosphere during photosynthesis. They use sunlight energy to convert CO2 and water into glucose and oxygen.
5. Which tree produces acorns?
Answer: Oak
Oak trees produce acorns. A single mature oak tree can produce tens of thousands of acorns in a good year, though only about one in 10,000 will grow into a new tree.
Things you'll learn along the way
- Bamboo is the fastest-growing plant on Earth. Some species can grow up to 35 inches (91 cm) per day under optimal conditions, which is nearly 1.5 inches per hour.
- Chlorophyll is the green pigment in plants that absorbs light energy for photosynthesis. It absorbs red and blue light but reflects green light, giving plants their characteristic color.
- The Venus flytrap is native only to a small area within a 75-mile radius around Wilmington, North Carolina, in the coastal Carolinas of the United States.
Frequently asked questions
Will I lose my progress if I close the page?
Your overall progress — XP, streaks, and badges — is saved in your browser automatically. A quiz that's underway restarts if you leave mid-game, but at about 7 minutes, Plant Kingdom Facts fits comfortably in one sitting.
How many questions are in Plant Kingdom Facts?
Plant Kingdom Facts has 15 multiple-choice questions. Each one has four answer options and an explanation that appears after you answer, so you learn something even when you miss.
Is Plant Kingdom Facts free to play?
Yes. The entire SeniorBrainGames catalog — including Plant Kingdom Facts — is free, with no sign-up required, no time limits, and no ads on top of the game. It also works offline once the page has loaded once.
How long does Plant Kingdom Facts take?
Most players finish Plant Kingdom Facts in about 7 minutes. You can pause between questions, replay it as often as you like, and there is no penalty for taking your time — answers are explained after you submit them.
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