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science · sec 1

study sciencewith SoraK

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hello, nice to meet you

meetSoraK

Secondary 1 student.
Professional daydreamer.
Has never once given up.

hi, i am sorak

Hi, I'm SoraK!

I'm in Secondary 1, and my brain runs about 47 tabs at the same time.
Forty-six of them are playing Roblox, livestreaming with my besties, watching YouTube and chatting online.
The last one is the homework, and it keeps getting closed by accident.

My attention loves taking tiny holidays, usually right when the teacher says the important bit.
It does not mean I'm lazy, and it does not mean I'm not clever.
It just means my brain needs study tricks that fit it.

SoraK's story

Made by my mum, a Singapore parent who saw a gap in how students study.

Sec 1 came fast.
First came Weighted Assessment 1, 2 and 3.
These are three rounds of tests, spread across Terms 1 to 3.
Each test counts towards the year's final grade.
My school decides how much.
Then came the End-of-Year exam in Term 4.
It is a test on everything learnt that year.

Each time, I rushed to revise.
Each time, I carried stacks of notes everywhere.
Then I noticed something.
The short, clear notes were the ones I actually read.
So my mum built this around that idea, for me and for you.

Why short notes matter

Long notes are hard to start and easy to skip.
Short notes are quick to read and easy to repeat.
They are light enough to carry.
Reading them again and again helps the key ideas stick.

My superpowers

Can spot a crunchy squishy through a crowded pasar malam in Tampines.
Has searched the whole house for my HELIX maths set.
My family found it under my table drawer.
Thinks of twelve brilliant ways to start homework, which is a very busy way to not start homework.
Falls off the plan.
Climbs back on.
Every single time.

A typical revision session

Open textbook.
Feel very proud.
Notice a message from my besties on WhatsApp.
Can't help but glance over.
Twenty minutes later, my whole WhatsApp is full of stickers from my friends and me.
No actual chatting.
Close textbook.
Open it again.
Whisper: "Okay, for real now."
Actually study.
(Yes, this part happens, and it works!)

The trick was never "try harder".
It was finding the way that works for me.

So I built this site my way

Wandering brains like small bites, so everything here is short.

Tiny topics

One idea at a time.
No walls of text.

Flip cards

Quick questions.
Flip, check, done.

Instant quiz

Answers come straight away, so nothing stays a mystery.

SoraK's tips for wandering brains

Ten-minute sprints.
Study for ten minutes, then a tiny break.
Repeat.
The parking lot.
Keep a scrap paper for random thoughts.
Write them down, then come back to them later.
Study beside a buddy.
Starting is easier when someone is working next to you.
Keep the study video playing and SoraK studies right beside you.
Wandered off?
Flip one card.
It's the easiest way back in.

My mottoI get distracted.
I come back.
Every.
Single.
Time.

More subjects are coming soon.
Join our free Telegram study channel.

basicsShort, clear and in order.
Use the chips to jump to a topic.

01Sc

What science is

Science is the study of natural phenomena: anything that happens in the world around us.
It is not locked inside the lab.
Cooking rice, charging a phone and a rainy sky all involve it.

Remember these

Many civilisations built up scientific knowledge over centuries.
It rests on evidence, so it can change when new evidence is widely accepted.
Science is a human activity.
It starts with curious people asking questions.

02Ev

Evidence: words or numbers

Qualitative

Described in words, using the senses: colour, smell, texture, sound.

The liquid turned cloudy and smelled sour.

Quantitative

Measured with instruments.
Always a number and a unit.

The ice melted in 6 min.

We collect evidence with our senses, or with instruments that extend them, such as a thermometer or a stopwatch.
The same evidence can sometimes be explained in more than one way, so scientists keep testing and debating.

03Fi

A fair investigation

Ask a question
Make a testable hypothesis
Plan a fair test
Collect data
Analyse the data
Conclude and share

A hypothesis is a possible explanation you can test.
After you conclude, repeat the experiment to check that the results are reliable.

Variable	What it means	Example
Independent	The one thing you change	Amount of salt added
Dependent	What you measure	Time for the ice to melt (s)
Controlled	Kept the same so the test is fair	Mass of ice, water volume, starting temperature

Example question: does the amount of salt in water change how fast an ice cube melts?
Change only one variable at a time.

04Me

Measuring well

A measurement is a number plus a unit, such as 5.00 cm, 20 s or 100 g.

Quantity	SI unit	Other common units
Length	m	cm, mm
Mass	kg	g
Time	s	min, h
Volume	m³	cm³, mL
Temperature	K	°C

Accuracy vs precision

Accuracy is how close a reading is to the true value. Precision is how close repeated readings are to each other.

Two common errors

Zero error

The instrument reads something when it should read zero.
Press the tare button, or subtract the zero error from every reading.

Parallax error

Reading a scale from the wrong angle.
Put your eye level with the mark and look straight at the scale.

Worked example

An empty balance shows 0.2 g.
A stone shows 15.6 g.

true mass = 15.6 − 0.2 = 15.4 g

Random errors are unpredictable, so repeat the reading and take the average. Systematic errors are the same every time, such as a zero error, so correct each reading.

Gentle reminder"Human error" scores nothing by itself.
Name the error, for example parallax error when reading the measuring cylinder.

05Sf

Staying safe in the lab

Hazard symbols

Read the label before you use any chemical.
The symbol tells you the main danger.

CorrosiveEats away skin, eyes and metals.

FlammableCatches fire easily.

OxidisingGives out oxygen, so fires burn harder.

ExplosiveMay explode when heated or shocked.

ToxicCan poison if swallowed, breathed in or touched.

Harmful or irritantCan irritate skin, eyes or nose.

Health hazardCan harm the body over time.

Gas under pressureCylinder may burst if heated.

Environmental hazardHarms living things in water or soil.

Bunsen burner flames

	Luminous flame	Non-luminous flame
Air hole	Closed	Open
Colour	Yellow	Blue
Heat	Cooler	Hotter
Use	Safety flame, easy to see	Heating

Lighting it

Check the air hole is closed.
Turn on the gas tap.
Hold the lighter over the barrel and click it.
Open the air hole only when you need to heat.

Safe habits

Wear safety goggles when heating or using chemicals.
Point test tubes away from people.
Never taste chemicals.
Waft gases towards your nose.
Tie back long hair and never leave a flame alone.
Report spills and breakages to your teacher at once.

Scientific values

Good scientists show curiosity, creativity, perseverance, open-mindedness, objectivity, integrity and responsibility.

06So

Science in society

Science and technology improve lives, and they can also cause harm.
Weigh both sides before deciding.

Example	Benefit	Harm or issue
Plastics	Light, cheap, waterproof	Not biodegradable, so it pollutes land and sea
Pesticides	Protect crops, bigger harvests	Kill useful insects, can build up in food chains
Antibiotics	Treat bacterial infections	Overuse can make bacteria resistant

Science has limits too.
It cannot yet cure every disease or predict earthquakes exactly, so we must use it responsibly.

07Ck

Can you do these?

Tick each one when you can do it without peeking at the notes.

Welcome!

study sciencewith SoraK

How it works

Your chapters

Level 1 · 0%

meetSoraK

Hi, I'm SoraK!

SoraK's story

Why short notes matter

My superpowers

A typical revision session

So I built this site my way

Tiny topics

Flip cards

Instant quiz

SoraK's tips for wandering brains

What science is

Remember these

Evidence: words or numbers

Qualitative

Quantitative

A fair investigation

Measuring well

Accuracy vs precision

Two common errors

Zero error

Parallax error

Staying safe in the lab

Hazard symbols

Bunsen burner flames

Lighting it

Safe habits

Scientific values

Science in society

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