Chapter 7 of 15
Chapter 7: Jugs and Mugs
Lemon Drink Stall, Measuring Liquid Volume, The Thirsty Crow | CBSE Session 2026–27
Core Pedagogical Competencies & Concepts
- Understanding liquid capacity (volume) using non-standard units (glasses, mugs, spoons, jugs).
- Setting up a Lemon Drink (Nimbu Paani) stall: calculating ingredients for multiple glasses.
- Comparing capacity of containers: which holds the most, which holds the least.
- The Thirsty Crow experiment: water level rises when stones/pebbles are dropped in.
All Textbook Exercises & In-Text Tasks (19 Questions)
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Q1
Textbook Exercise • Nimbu Paani Ingredients
To make 1 glass of lemon drink, you need 2 spoons of sugar. How many spoons of sugar are needed to make 5 glasses of lemon drink?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Calculation:
• Sugar for 1 glass = 2 spoons
• Sugar for 5 glasses = 5 × 2 = 10 spoons of sugar.
• Sugar for 1 glass = 2 spoons
• Sugar for 5 glasses = 5 × 2 = 10 spoons of sugar.
CBSE Step-by-Step Marking Scheme
Multiplication 5 × 2 shown
1 M
10 spoons calculated correctly
1 M
Q2
Textbook Exercise • Filling Containers
Sunaina and Jaspreet brought different vessels from their kitchen: a cup, a glass, a small pot, and a jug. Which vessel holds the least water? Which vessel holds the most water?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Answer:
• The cup holds the least water.
• The jug (or large pot) holds the most water.
• The cup holds the least water.
• The jug (or large pot) holds the most water.
CBSE Step-by-Step Marking Scheme
Cup identified as holding least
1 M
Jug/pot identified as holding most
1 M
Q3
Textbook Exercise • Glasses to Fill a Jug
Jaspreet found that 1 jug can be filled completely with 8 glasses of water. How many glasses of water are needed to fill 2 such jugs?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Calculation:
• 1 jug = 8 glasses
• 2 jugs = 8 × 2 = 16 glasses of water.
• 1 jug = 8 glasses
• 2 jugs = 8 × 2 = 16 glasses of water.
CBSE Step-by-Step Marking Scheme
Multiplication 8 × 2 shown
1 M
16 glasses correct
1 M
Q4
Textbook Exercise • Capacity Comparison
A small bowl takes 3 cups of water to fill. A soup bowl takes 5 cups of water to fill. Which bowl has greater capacity and by how many cups?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Solution:
• Small bowl = 3 cups
• Soup bowl = 5 cups
• Since 5 > 3, the soup bowl has greater capacity.
• Difference = 5 - 3 = 2 cups more.
• Small bowl = 3 cups
• Soup bowl = 5 cups
• Since 5 > 3, the soup bowl has greater capacity.
• Difference = 5 - 3 = 2 cups more.
CBSE Step-by-Step Marking Scheme
Soup bowl identified
1 M
Difference of 2 cups calculated
1 M
Q5
NCERT Story • Thirsty Crow Experiment
Chirpy the crow was very thirsty. There was very little water in the pitcher at the bottom, and his beak could not reach it. Chirpy picked up pebbles one by one and dropped them into the pitcher. What happened to the water level?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Explanation:
• As pebbles sank to the bottom of the pitcher, they took up space (volume).
• This displaced the water and pushed the water level up until Chirpy could drink easily and fly away happily.
• As pebbles sank to the bottom of the pitcher, they took up space (volume).
• This displaced the water and pushed the water level up until Chirpy could drink easily and fly away happily.
CBSE Step-by-Step Marking Scheme
Pebbles taking up volume explained
1 M
Water level rising stated
1 M
Q6
Textbook Activity • Drops in a Spoon
Using an eye dropper, guess how many drops of water will fill a teaspoon. If it takes about 20 to 25 drops, will a tablespoon take more drops or fewer drops?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Answer:
• A tablespoon is much bigger than a teaspoon.
• Therefore, it will take more drops (around 60 to 75 drops) to fill a tablespoon.
• A tablespoon is much bigger than a teaspoon.
• Therefore, it will take more drops (around 60 to 75 drops) to fill a tablespoon.
CBSE Step-by-Step Marking Scheme
More drops identified
1 M
Tablespoon size comparison explained
1 M
Q7
NCERT Investigation • The Milkman Mystery
Rani's mother takes milk from Shyamu the milkman every day. Shyamu uses his metal mug 3 times to fill Rani's pot. One day, Rani brought a wide flat vessel, and the milk reached only halfway up. Did the milkman give less milk that day? Explain.
[3 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Explanation:
• No, the milkman gave the exact same amount of milk (3 full mugs).
• Reason: The wide flat vessel has a broader bottom, so the same volume of milk spreads out sideways and appears lower in height. Liquid changes its shape to match the container without changing its quantity.
• No, the milkman gave the exact same amount of milk (3 full mugs).
• Reason: The wide flat vessel has a broader bottom, so the same volume of milk spreads out sideways and appears lower in height. Liquid changes its shape to match the container without changing its quantity.
CBSE Step-by-Step Marking Scheme
Affirmative confirmation: same milk given
1 M
Wider container bottom spreads liquid explained
1 M
Volume conservation concept
1 M
Q8
Ordering Containers by Capacity
Arrange these 4 containers in order from LEAST capacity to GREATEST capacity: Bucket, Teaspoon, Water Bottle, Mug.
[2 Marks]
✅ Step-by-Step Solution & Working
Arrangement (Least to Greatest):
1. Teaspoon (holds smallest amount)
2. Mug
3. Water Bottle
4. Bucket (holds largest amount).
1. Teaspoon (holds smallest amount)
2. Mug
3. Water Bottle
4. Bucket (holds largest amount).
CBSE Step-by-Step Marking Scheme
Correct order from teaspoon to bucket
2 M
Q9
Everyday Math • Drinking Water Goal
Doctor uncle advises Rahul to drink 8 glasses of water every day. If Rahul drinks 2 glasses in the morning, 3 glasses in the afternoon, and 2 glasses in the evening, has he reached his goal? How many more glasses should he drink?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Solution:
• Water drunk so far = 2 + 3 + 2 = 7 glasses.
• Daily target = 8 glasses.
• Rahul has not reached his goal yet. He needs to drink: 8 - 7 = 1 more glass.
• Water drunk so far = 2 + 3 + 2 = 7 glasses.
• Daily target = 8 glasses.
• Rahul has not reached his goal yet. He needs to drink: 8 - 7 = 1 more glass.
CBSE Step-by-Step Marking Scheme
Sum of 7 glasses calculated
1 M
1 more glass needed correct
1 M
Q10
Practical Conservation • Water Waste
A leaking bathroom tap drips 1 cup of water every hour. How many cups of clean water are wasted in 6 hours?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Calculation:
• Water wasted in 1 hour = 1 cup
• Water wasted in 6 hours = 6 × 1 = 6 cups of water.
• Water wasted in 1 hour = 1 cup
• Water wasted in 6 hours = 6 × 1 = 6 cups of water.
CBSE Step-by-Step Marking Scheme
Multiplication 6 × 1 shown
1 M
6 cups answer correct
1 M
Q11
Capacity Unit Sense
Which unit would be more suitable to measure the water in an overhead water tank: mugs or buckets?
[1 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Answer:
• An overhead water tank holds hundreds of litres of water.
• Buckets are much more suitable than tiny mugs to measure such a large volume.
• An overhead water tank holds hundreds of litres of water.
• Buckets are much more suitable than tiny mugs to measure such a large volume.
CBSE Step-by-Step Marking Scheme
Buckets selected with reason
1 M
Q12
Comparative Problem • Water Bottle Capacity
Arun's water bottle holds 4 glasses of water. Geeta's water bottle holds 6 glasses of water. If both pour their full bottles into an empty jug, how many glasses of water are in the jug?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Calculation:
• Arun's bottle = 4 glasses
• Geeta's bottle = 6 glasses
• Total water in jug = 4 + 6 = 10 glasses of water.
• Arun's bottle = 4 glasses
• Geeta's bottle = 6 glasses
• Total water in jug = 4 + 6 = 10 glasses of water.
CBSE Step-by-Step Marking Scheme
Addition 4 + 6 shown
1 M
10 glasses answer correct
1 M
Q13
Hands-on Science • Marble Displacement
A transparent glass is filled halfway with water. If you gently drop 5 glass marbles into the water, what happens to the water level?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Answer:
• The water level rises higher.
• The solid marbles take up space at the bottom and push the water upwards.
• The water level rises higher.
• The solid marbles take up space at the bottom and push the water upwards.
CBSE Step-by-Step Marking Scheme
Water level rises stated
1 M
Displacement explanation
1 M
Q14
Everyday Cooking • Rice Pot
To cook 1 cup of rice, mother adds 2 cups of water. How many cups of water must she add to cook 3 cups of rice?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Calculation:
• 1 cup rice = 2 cups water
• 3 cups rice = 3 × 2 = 6 cups of water.
• 1 cup rice = 2 cups water
• 3 cups rice = 3 × 2 = 6 cups of water.
CBSE Step-by-Step Marking Scheme
3 × 2 shown
1 M
6 cups of water correct
1 M
Q15
True or False
State True or False:
(a) A tea cup holds more liquid than a bucket.
(b) Pouring water from a tall thin bottle into a round bowl changes the total amount of water.
[2 Marks]
(a) A tea cup holds more liquid than a bucket.
(b) Pouring water from a tall thin bottle into a round bowl changes the total amount of water.
✅ Step-by-Step Solution & Working
Answers:
(a) False. A bucket holds much more liquid than a tiny tea cup.
(b) False. Pouring changes the shape of the liquid, but the total amount (volume) remains exactly the same.
(a) False. A bucket holds much more liquid than a tiny tea cup.
(b) False. Pouring changes the shape of the liquid, but the total amount (volume) remains exactly the same.
CBSE Step-by-Step Marking Scheme
(a) False with reason
1 M
(b) False with volume conservation reason
1 M
Q16
Bucket Bath vs Shower
Taking a bath with 1 bucket of water uses about 15 litres. A 10-minute running shower uses about 60 litres. Which uses less water and helps save water?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Answer:
• A bucket bath uses only 15 litres compared to 60 litres for a shower.
• Taking a bucket bath saves 45 litres of clean water every time and is very environment-friendly.
• A bucket bath uses only 15 litres compared to 60 litres for a shower.
• Taking a bucket bath saves 45 litres of clean water every time and is very environment-friendly.
CBSE Step-by-Step Marking Scheme
Bucket bath identified as using less water
1 M
Water saving calculation (60 - 15 = 45 litres)
1 M
Q17
Chapter Reflection
What does the word 'capacity' mean in simple words?
[1 Marks]
✅ Step-by-Step Solution & Working
Definition:
• Capacity is the maximum amount of liquid (like water, milk, or juice) that a container can hold inside it.
• Capacity is the maximum amount of liquid (like water, milk, or juice) that a container can hold inside it.
CBSE Step-by-Step Marking Scheme
Clear simple definition of capacity
1 M
Q18
Quick Math Problem
If 1 teapot fills 4 cups of tea, how many teapots are needed to serve 12 cups of tea to guests?
[2 Marks]
✅ Step-by-Step Solution & Working
Step-by-Step Solution:
• 1 teapot = 4 cups
• Teapots needed for 12 cups = 12 ÷ 4 = 3 teapots.
• 1 teapot = 4 cups
• Teapots needed for 12 cups = 12 ÷ 4 = 3 teapots.
CBSE Step-by-Step Marking Scheme
Division 12 ÷ 4 shown
1 M
3 teapots calculated correctly
1 M
Q19
Textbook Activity • Lemon Drink Stall
Sunaina uses 2 lemons and 4 spoons of sugar to make 1 big jug of sweet lemon drink. If she wants to make 3 jugs of lemon drink for the school fair, how many lemons and spoons of sugar will she need?
[2 Marks]
✅ Step-by-Step Solution & Working
Calculation:
• Lemons needed = 3 × 2 = 6 lemons.
• Spoons of sugar needed = 3 × 4 = 12 spoons of sugar.
• Lemons needed = 3 × 2 = 6 lemons.
• Spoons of sugar needed = 3 × 4 = 12 spoons of sugar.
CBSE Step-by-Step Marking Scheme
6 lemons
1 M
12 spoons of sugar
1 M
🌟 NEP 2020 Competency-Based Case Study
School Village Fair Nimbu Paani Stall
Chaitra, Nazma, and Shabnam set up a Lemon Drink stall at the village fair. To make 1 glass of lemon drink, they need: half a lemon, 2 spoonfuls of sugar, and 1 pinch of salt. They sell small glasses for ₹5 and big glasses for ₹10.
Analytical Task: How many whole lemons are needed to make 6 glasses of lemon drink? If they sell 8 small glasses and 4 big glasses, how much total money do they earn?
Evaluation & Model Answer:
1. 1 glass needs 1/2 lemon. For 6 glasses, they need: 6 × 1/2 = 3 whole lemons.
2. Money from small glasses: 8 × ₹5 = ₹40.
3. Money from big glasses: 4 × ₹10 = ₹40.
4. Total money earned = ₹40 + ₹40 = ₹80.
2. Money from small glasses: 8 × ₹5 = ₹40.
3. Money from big glasses: 4 × ₹10 = ₹40.
4. Total money earned = ₹40 + ₹40 = ₹80.
Rubric: 1 M for lemons calculation (3) + 1 M for glass sales breakdown + 1 M for total earnings (₹80)