📏 Measurement System
Master the fundamental concepts of measurement
📏 Length - Distance & Measurement
What is Length?
Length is the measurement of how long, wide, or tall something is. It's the distance between two points.
Common Units of Length:
Millimeter (mm)
Very small measurements
Thickness of a coin
Centimeter (cm)
Small measurements
Width of your finger
Meter (m)
Medium measurements
Height of a door
Kilometer (km)
Large measurements
Distance between cities
Conversion Chart:
1 kilometer = 1,000 meters
1 meter = 100 centimeters
1 centimeter = 10 millimeters
Interactive Length Converter:
Real-World Examples:
Around the House
• Door height: ~2 meters
• Dining table: ~150 cm
• Textbook thickness: ~20 mm
Sports & Recreation
• Cricket pitch: 22 yards (20.12 m)
• Badminton court: 13.4 meters
• Hockey field: 91.4 meters
Travel & Geography
• Delhi to Mumbai: ~1,400 km
• School compound: ~200 meters
• Village to town: 10-20 km
Interactive Activities:
Length Estimation Game:
Estimate: How tall is a typical door in meters?
metersEstimate: How long is a cricket pitch in meters?
metersPractice Problems:
Problem 1: Convert 2.5 kilometers to meters.
metersProblem 2: How many centimeters are in 1.5 meters?
centimetersProblem 3: A textbook is 25 cm long. How many millimeters is this?
millimetersRelated Images:
Measuring Tools
Size Comparisons
Real World Examples
⚖️ Mass - Weight & Heaviness
What is Mass?
Mass is the amount of matter in an object. It tells us how heavy something is.
Common Units of Mass:
Milligram (mg)
Very light objects
A grain of salt
Gram (g)
Light objects
A paperclip
Kilogram (kg)
Heavy objects
A bag of sugar
Tonne (t)
Very heavy objects
A car
Conversion Chart:
1 tonne = 1,000 kilograms
1 kilogram = 1,000 grams
1 gram = 1,000 milligrams
Interactive Mass Converter:
Real-World Examples:
Food & Kitchen
• Mango: ~200 grams
• Bag of rice: 5 kg
• Teaspoon of turmeric: 3 g
Animals & People
• Indian cow: 300-400 kg
• Adult person: 50-70 kg
• Asian elephant: 3-5 tonnes
Objects & Vehicles
• Mobile phone: 180 g
• Hero bicycle: 18 kg
• Maruti car: 800 kg
Interactive Activities:
Mass Comparison Game:
Compare: Which is heavier - 5 mangoes (200g each) or 1 bag of rice (1kg)?
Estimate: How much does a mobile phone weigh in grams?
gramsPractice Problems:
Problem 1: Convert 3.2 kilograms to grams.
gramsProblem 2: How many kilograms are in 2,500 grams?
kilogramsProblem 3: An elephant weighs 4 tonnes. How many kilograms is this?
kilogramsRelated Images:
Weighing Scales
Weight Comparisons
Everyday Objects
⏰ Time - Duration & Intervals
What is Time?
Time is the measurement of duration - how long something takes or when something happens.
Common Units of Time:
Second (s)
Very short durations
Blink of an eye
Minute (min)
Short durations
Brush your teeth
Hour (h)
Medium durations
Watch a movie
Day
Long durations
Sleep and wake cycle
Conversion Chart:
1 minute = 60 seconds
1 hour = 60 minutes = 3,600 seconds
1 day = 24 hours = 1,440 minutes
Interactive Time Converter:
Real-World Examples:
Daily Activities
• Morning prayers: 15 minutes
• Cooking dal-rice: 45 minutes
• Night sleep: 7-8 hours
School & Work
• Class period: 40 minutes
• School day: 6 hours
• Tuition classes: 2 hours
Entertainment
• Bollywood song: 4-5 minutes
• Cricket match: 3-8 hours
• Hindi movie: 2.5-3 hours
Interactive Activities:
Time Estimation Challenge:
Estimate: How long does it take to cook dal-rice?
minutesEstimate: How long is a typical Bollywood movie?
hoursTime Calculator:
Calculate: If school starts at 8:00 AM and each period is 40 minutes with 5 breaks of 10 minutes each, what time does the 6th period end?
Practice Problems:
Problem 1: Convert 2.5 hours to minutes.
minutesProblem 2: How many seconds are in 5 minutes?
secondsProblem 3: A cricket match lasts 8 hours. How many minutes is this?
minutesRelated Images:
Clocks & Timers
Daily Activities
Time Management
📅 Calendar - Dates & Scheduling
What is a Calendar?
A calendar is a system for organizing days, weeks, months, and years. It helps us schedule events and track time.
Calendar Units:
Day
24 hours
Monday, Tuesday, etc.
Week
7 days
Sunday to Saturday
Month
28-31 days
January, February, etc.
Year
365 or 366 days
12 months
Calendar Facts:
1 week = 7 days
1 month = 28-31 days (average 30.4 days)
1 year = 12 months = 52 weeks = 365 days
Leap year = 366 days (every 4 years)
Days of the Week:
Weekdays: Monday, Tuesday, Wednesday, Thursday, Friday
Weekend: Saturday, Sunday
Real-World Examples:
Indian School Calendar
• Academic year: April-March
• Summer vacation: May-June
• School week: 6 days (Mon-Sat)
Indian Festivals
• Diwali: October/November
• Holi: March (Phalgun)
• Dussehra: September/October
Indian Seasons
• Summer: March-June
• Monsoon: June-September
• Winter: October-February
Interactive Activities:
Festival Date Calculator:
Calculate: If Diwali is on November 12th this year, what day of the week will it be next year (November 12th)?
School Calendar Planner:
Plan: If summer vacation starts on May 1st and lasts 8 weeks, when does school reopen?
Practice Problems:
Problem 1: How many days are in 3 weeks?
daysProblem 2: How many months are in 2 years?
monthsProblem 3: If today is Wednesday, what day will it be after 10 days?
Related Images:
Calendar Types
Seasons & Months
Event Planning
🥤 Capacity - Volume & Liquids
What is Capacity?
Capacity is the amount of liquid or substance that a container can hold. It measures volume.
Common Units of Capacity:
Milliliter (mL)
Small amounts
A teaspoon of medicine
Liter (L)
Medium amounts
A bottle of water
Kiloliter (kL)
Large amounts
A swimming pool
Conversion Chart:
1 kiloliter = 1,000 liters
1 liter = 1,000 milliliters
1 milliliter = 1 cubic centimeter (cm³)
Interactive Capacity Converter:
Real-World Examples:
Kitchen & Cooking
• Chai cup: 150 mL
• Steel glass: 200 mL
• Milk packet: 500 mL
Beverages
• Lassi glass: 250 mL
• Water bottle: 1 L
• Coconut water: 200 mL
Large Containers
• Water tank: 1,000 L
• Petrol tank: 40 L
• Village well: 10 kL
Helpful Tips:
Remember: 1 liter is about the size of a large water bottle
Tip: 1 mL of water weighs about 1 gram
Visual: A cube that is 10cm × 10cm × 10cm holds exactly 1 liter
Interactive Activities:
Kitchen Measurement Game:
Recipe Challenge: A recipe needs 250mL milk, 150mL water, and 100mL oil. How much total liquid?
mLWater Tank Problem: A 1000L tank is 3/4 full. How many liters of water are in it?
LBeverage Size Comparison:
Compare: Which holds more - 4 chai cups (150mL each) or 2 lassi glasses (250mL each)?
Practice Problems:
Problem 1: Convert 2.5 liters to milliliters.
millilitersProblem 2: How many liters are in 750 milliliters?
litersProblem 3: A water bottle holds 500mL. How many bottles fill a 2L jug?
bottlesRelated Images:
Measuring Cups
Bottles & Containers
Kitchen Applications
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