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Chapter Analysis
Beginner14 pages • EnglishQuick Summary
The chapter 'How Big? How Heavy?' introduces the concepts of measuring weight and volume using practical examples such as comparing the weights of coins, estimating the weight of animals, and finding volume using marbles. It engages students with real-world scenarios, such as banking with weights instead of counts and estimating the food requirements in a trek to Gangotri. Activities encourage students to get hands-on experience through experiments and problem-solving exercises.
Key Topics
- •Measurement of volume using marbles
- •Weight comparison of different objects
- •Practical applications of weight and volume
- •Real-life problem solving using estimates
- •Understanding of mass through coins and common objects
Learning Objectives
- ✓Understand the concept of volume and how it is measured
- ✓Learn to compare weights of different objects practically
- ✓Develop skills to estimate weights and volumes in real-life situations
- ✓Engage in hands-on activities to measure and compare objects
- ✓Apply mathematical concepts to solve real-world problems
Questions in Chapter
Can you hold these coins and say which is the heaviest?
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How many coins are there in a sack of 5 rupee coins if it weighs: a) 18 kg? b) 54 kg? c) 4500 g? d) 2 kg and 250 g? e) 1kg and 125 g?
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A 2 rupee coin weighs 6 g. What is the weight of a sack with: a) 2200 coins? b) 3000 coins?
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If 100 one rupee coins weigh 485 g then how much will 10000 coins weigh?
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Additional Practice Questions
If you have a bag weighing 10 kg filled with objects weighing 100 g each, how many objects are in the bag?
easyAnswer: Approximately 100 objects are in the bag because 10 kg is 10000 g and 10000 g ÷ 100 g/object = 100 objects.
What volume of water will 50 five-rupee coins displace if 9 coins displace 10 mL?
mediumAnswer: 50 five-rupee coins will displace about 55.56 mL of water. (Since 9 coins displace 10 mL, each coin displaces approximately 1.11 mL: 50 coins × 1.11 mL = 55.56 mL)
Estimate the number of one gram marbles needed to match the weight of a 1 kg object.
easyAnswer: Approximately 1000 marbles are needed as 1 kg equals 1000 g, and each marble weighs 1 g.
How much food will a grown-up elephant eat in one year if it eats 136 kg in a day?
hardAnswer: An elephant will eat approximately 49640 kg in a year (assuming 365 days: 136 kg/day × 365 days = 49640 kg).
If you have a measure of 250 mL, how many 50 mL portions can you extract from it?
mediumAnswer: You can extract 5 portions since 250 mL divided by 50 mL per portion equals 5.