Information and IdeasEasyMain idea of how popcorn pops
Information and Ideas practice question
Popcorn pops because each kernel holds a drop of water sealed inside a hard shell. When the kernel is heated, the water turns to steam, the pressure builds, and the shell bursts; the starch inside puffs outward and sets as it cools.
Which choice best states the main idea of the text?
- A. Popcorn pops when steam from the water inside a kernel bursts the kernel's shell.Correct
- B. Popcorn kernels contain no water.
- C. Popcorn is made by blowing steam into corn.
- D. A popcorn kernel's shell is soft.
Answer: A. Popcorn pops when steam from the water inside a kernel bursts the kernel's shell.
Water, steam, pressure, burst — the text explains the popping, and choice A sums it up.
Why the other answers are wrong
- B. Popcorn kernels contain no water.
- The text says each kernel holds a drop of water.
- C. Popcorn is made by blowing steam into corn.
- The steam comes from inside the kernel, not from outside.
- D. A popcorn kernel's shell is soft.
- The text calls the shell hard.
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