lesson
Water moves between places and states
1 · Learn
Energy from the Sun helps water evaporate from surfaces. Water vapour can cool and condense into tiny droplets in clouds. Water can return as precipitation, collect in rivers or lakes, or soak into the ground.
These processes form connected cycles, not a single route followed by every drop. Warmer conditions often increase evaporation when other conditions are comparable; airflow, humidity and exposed area also matter.
2 · Worked example
To compare drying in two temperatures, I keep the material, starting wetness and exposed area as similar as possible. I also note airflow rather than pretending only temperature matters.
3 · Your turn
Which process changes water vapour into cloud droplets? Why keep the starting wetness similar in a drying comparison?
Check your answer
Condensation. Similar starting wetness makes the comparison fairer; otherwise one sample may dry sooner simply because it began with less water.
4 · Apply your learning
Draw a labelled water-cycle model, then plan a safe adult-supervised comparison of drying conditions. Record limitations as well as results.
Adult guidance and safety
No dangerous heat sources. Do not collect or drink environmental water; use drawings and safe small samples.
Open your writing and drawing pad
Write, draw or show your working. Use a mouse, pen or finger. This pad is not a submitted answer.
Not saved to your account. Download your drawing as PNG and your typed notes as TXT before leaving or refreshing. They are separate files. Do not enter private information.
Open a picture saved on this device to draw on it again. Opening replaces the drawing, but Undo can restore it. PNG only, up to 4 MB and 4096 × 4096 pixels. The picture stays in this browser; it is not uploaded. Paper lines in a saved picture become part of that picture.
Clear the drawing? Your typed notes will stay. You can undo this action.
Your pad is empty.
Open a UTF-8 TXT file from this device, up to 40 KB and 10,000 characters. It stays in this browser. Opening can be undone until you type again. Downloads keep a new copy; they do not change the file you opened.
Replace the notes on this page with the opened file? Download the current notes first if you want to keep them.
Typed notes are not submitted answers.
My observation notebook
With an adult, look at a safe real example or a checked photograph. Name the example and say which you used. Record what you actually notice. Do not taste plants or materials, approach unknown animals or invent missing observations.
Ask your teacher for support with the method and recording. A prediction is what you think might happen; an observation is what you actually see, hear or feel safely.
Keep your notebook: use Download notebook before leaving. Nothing is sent to the website or saved to your account. Reopen the downloaded notebook here to add another day's record. Do not include names, addresses or other private information.
Your records on this page
No observations recorded yet. Look first, then add one.
Reopening adds records; it does not replace your current records. Up to 50 records per notebook. Keep your downloads somewhere private. Editing this notebook does not submit work or complete a lesson.
Practice this lesson
Lesson resources
Browse the available practice activities and worksheets for this lesson.
Your progress