One block. Three surfaces. Evidence.

Use repeated results to explain what happened in this setup.

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Find Monday’s prediction. Do not erase it.

Which surface do you think will stop the block sooner?

Choose a role: tester, observer, director or recorder.

Adult checks the low ramp and padded stop.

Use the same block, release mark and ramp height.

Keep each surface level and the ramp join fixed.

Hands clear. Release gently; never add a push.

Name the surface in your results table.

Release from the mark without a push.

Measure the stopping distance in cm.

Reset everything and run Trial 2.

Keep both results, even if they differ.

Replace the level surface sample.

Keep the block, ramp, release and join the same.

Measure Trial 1 and Trial 2 from the same zero.

Write a note if the method changed.

Check the controls before the first release.

Record two trials if time and access allow.

Which results are close? Which need checking?

Record unfinished trials honestly.

Pause the equipment and compare your repeats.

Check one control: release, slope or measuring zero.

Mark an uncertain run. Keep the original value.

Choose one specific method concern.

Correct that concern with the adult.

If time allows, repeat and label the new result.

Keep the first result and the reason for retrying.

In our setup, ___ stopped the block over a shorter distance: ___ cm and ___ cm.

This supports ___ because ___. A control or uncertainty to check is ___.

Name and date your record; keep the prediction.

Label any model data or unfinished trials.

Return samples, block and measuring tools safely.

What helped you test, observe or record?

What could make the next activity easier to access?

Point, sign, speak, write—or pass privately.

Adult: agree one change and explain any limit.

Supported: name one place friction helps.

Standard: explain how a car’s brakes help it stop.

Stretch: explain a helpful and a harmful effect.

Brake friction transfers movement energy to heat. It helps slow the wheel.

Rubbing in moving engine parts can cause unwanted heating and wear.