Little Scientists: Observe and Find Evidence
FoundationInquiry starts with careful observation: ask questions, make guesses, then test with evidence — scientific conclusions must rest on evidence.
- Scientific inquiry begins with careful observation.
- Inquiry steps: observe, ask, guess, verify, conclude.
- Scientific conclusions must rest on evidence.
文體小知識：記敘文把探究過程像講故事一樣記下來。這一篇跟着小盈查葉子變黃的原因，學會觀察、猜想和找證據。
§Text Passage
1How do scientists discover new knowledge? It all starts with observation. Legend says Newton watched an apple fall from a tree, asked why, and finally uncovered the truth of gravity. Watch carefully, listen closely, think hard — anyone can explore the world like a scientist.
2Inquiry has clear steps: first observe and notice a phenomenon; second ask a why question; third guess possible causes; fourth verify — run experiments or keep observing to gather evidence; fifth conclude, letting the evidence speak. Follow the steps one by one and your thinking stays clear.
3Why must science rely on evidence? Because guesses may be wrong. I guess the cat knocked over the vase — that is only a guess; finding cat hairs and the direction the pieces scattered is evidence. However charming a guess sounds, without evidence it cannot be a conclusion. Evidence is the foundation stone of science.
4Evidence comes from careful observation and recording: eyes for colour changes, rulers for lengths, notes for dates and numbers, cameras for the scene. The more evidence, the more reliable the conclusion; if new evidence overturns an old conclusion, ideas must change — and that is exactly what makes science precious.
5Be a little scientist from today: pick a question around you, then observe, ask, guess, verify and record. Remember the rhyme: eyes ready, hands ready, mind ready — let the evidence speak. Build this habit, and you will find the world fascinating everywhere, with a reason behind everything.
1Summary 重點摘要
Inquiry starts with careful observation: ask questions, make guesses, then test with evidence — scientific conclusions must rest on evidence.
2Vocabulary cards Vocabulary
To watch things and their changes carefully.
To ask why about what you observed.
A possible cause or answer, waiting to be tested.
Facts that support or overturn a guess, like measurements and records.
To test a guess with experiments or gathered facts.
To write down or photograph what you observe.
The final answer drawn from the evidence.
To look at how two things are alike or different for clues.
Something observed or changed, like leaves turning yellow.
The process of asking, testing and finding answers like a scientist.
3Step by step Steps
- Step 1: Learn to observe carefullyObserving is not a casual glance but purposeful, orderly looking. Practise: pick a leaf — first its overall shape, then whether the edge is smooth or toothed, how the veins run, whether the two sides differ in colour; touch it — smooth or rough; smell it (only safe things!) — any scent? Use many senses: eyes, fingers, nose, and a magnifying glass when needed. Write down everything you observe — each detail is evidence for later.
- Step 2: Ask good questions from observationCareful observation turns up questions worth asking: Why do ants march in a line? Why are soap bubbles round? Why does the sunflower face the sun? Good questions are specific and checkable — why has the pot plant's leaves turned yellow is easier to start than why is the plant acting strange. Write your questions on the first page of a notebook and build your own question bank. Many great discoveries in science began with one small why — like Newton asking why the apple fell downwards.
- Step 3: Make sensible guessesWith a question, brainstorm possible answers — that is guessing. A question can have many guesses: yellowing leaves might mean too little water, too little sunlight, insect damage, or cooler weather. When guessing, ask: is it sensible? Does past experience support it? Remembering that the last watering was ten days ago makes the dryness guess likely. A guess is not random — it is a reasoned prediction based on observation and experience. Write every guess down and test them one by one.
- Step 4: Gather evidence with your handsTesting guesses needs evidence, gathered in several ways: keep observing, recording the leaves' changes over several days; run a comparison experiment — two identical pots of bean sprouts, one watered on schedule, one not, then compare; measure and record, using a ruler for the sprouts' height and noting numbers; consult books or teachers for what is already known. Remember: change only one condition at a time and keep everything else the same, or the results will not be convincing.
- Step 5: Conclude with the evidenceWith enough evidence, draw the conclusion: if the watered sprouts stay green and healthy while the unwatered ones wither, the dryness guess is confirmed — too little water turns leaves yellow. Watch for two situations: if evidence contradicts the guess, revise or discard it and test again — never dig in; if evidence is thin, leave room in the conclusion and run more trials. Scientists respect evidence and let it speak — the most precious part of science.
- Step 6: Record and share your inquiryGood inquiry needs good records: design a simple table with the date, what you did, what you observed, numbers and photos. Record honestly — write exactly what happened, never invent shortcuts. Then share with classmates: How did you observe? What did you guess? What was your evidence? What was your conclusion? Others may have new ideas that deepen the inquiry. Scientific knowledge grows exactly like this — many people observing, verifying and sharing, bit by bit.
5Worked example Example
Example: Ying finds several leaves on her windowsill pot plant turning yellow. How can she find the cause like a scientist?
- Observe: where are the yellow leaves, is the soil dry or wet, any insects on the leaves, where does the pot sit?
- Ask and guess: why are the leaves yellow? Perhaps too little water, too little sunlight, or insect damage.
- Gather evidence: feel the soil for dryness, note how many hours of sun the pot gets each day, check under the leaves for pests; record the changes for several days.
- Verify: the soil has been dry for ages — Ying forgot to water for over ten days. She waters on schedule, and new leaves slowly turn green again.
- Conclude: lack of water yellowed the leaves. Observation, guessing and evidence — a complete scientific inquiry.
- Answer: Ying observed the leaves and soil carefully, made three guesses — dryness, darkness or pests — then gathered evidence by feeling the soil, checking under leaves and recording daily, finally proving it was lack of water. Inquiry starts with observation and concludes with evidence.
6Common mistakes Mistakes
7Quick check Quick check
Q1What does scientific inquiry start with?
Q2What is needed between a guess and a conclusion?
Q3Name one way to gather evidence.
Q4What should we do when evidence overturns our guess?
Q5Which step is: why are the leaves turning yellow?
8Recap Recap
- Scientific inquiry begins with careful observation.
- Inquiry steps: observe, ask, guess, verify, conclude.
- Scientific conclusions must rest on evidence.
- When evidence contradicts a guess, revise your ideas.
- Record well and let the evidence speak.