Skip to content
Your progress

Checking your sign-in…

Who's learning?

Each profile keeps its own read lessons, badges, streak, and practice scores on this device.

Lesson 2 of 9

Ask a question you can check

Show on a big screen

5 min

Text size

Two questions. Why do plants lean toward the sun? Is mango the tastiest fruit? Only one can be tested.

Loading lab…

A checkable question and an opinion question.
Step 1 of 4
  1. A checkable question and an opinion question.
  2. The checkable one has a test. A test can check it.
  3. The opinion one has no test. Nothing can check it.
  4. Checkable means you can test it.

Checkable question — a question you can test. You watch, measure or try it.

Example: does a plant lean more toward a bright window? Move the plant, watch it, and measure the lean.

"Is mango the tastiest fruit?" has no test. Two people can answer it differently. That is an opinion: what one person thinks or likes.

Try the lab to finish this lesson.