Lena plans to time how long a toy rolls. Her timer never starts. What should she check before using its reading as evidence?

• Whether her prediction feels right.
• Whether the timer starts and measures time.
• Whether she likes the result she hoped to see.

Mia predicts that a rock will float. She puts it in water and watches it sink. What should she record?

• Her prediction: this rock floated.
• Her observation: this rock sank.
• Her wish: this rock floated.

A surprising result always proves that the test has a mistake.

Which child uses checked evidence to reconsider an idea?

• Ana checks the result and then changes her idea.
• Ben hides the surprising result.
• Cleo skips the test because her idea feels certain.

Tom predicts that his plant will grow faster in a dark closet. In his test, it grows more slowly there than before. Which statement stays close to his evidence?

• This plant grew more slowly in the closet.
• All plants grow faster in the dark.
• The closet's size caused this plant's slower growth.

A result that matches your prediction can still give you useful evidence.

Two friends predict that their big-wing paper plane will fly farther. Their small-wing plane flies farther in one test. What should they do next?

• Discard the result and report that their prediction came true.
• Decide small wings always make every paper plane fly farther.
• Keep the result and repeat the test in the same way.

Ravi's magnet pulls a steel clip but not a plastic spoon. He says the spoon result cannot count because he expected movement. What is the problem with his response?

• He checks the magnet on a clip before using the spoon.
• He dismisses a result because it surprised him.
• He records both results before reconsidering his idea.