To change things, we often use heat. Find out what happens to certain things when you heat them. Substance Method of heating Changes brought about by heating Egg Boiling Frying Water Sugar Milk

Substance Method of heating Changes brought about by heating Egg Boiling The liquid yolk hardens to solid Frying The clear liquid yolk turns white Water Boiling Water changes to gaseous vapour or steam Sugar Burning It first melts, then gets burnt or charred Milk Boiling The cream gets separated into a thin sheet

How may the following be separated? Mixture Method of separation a. Some grains of rice stuck in a ball of wax b. Some iron filings mixed with feathers c. Small stones mixed with wheat grains d. Some paddy husk mixed with paddy grains e. Some powdered chalk and powdered salt

Mixture Method of separation a. Some grains of rice stuck in a ball of wax Heating this mixture slightly will melt the wax. The rice grains can be separated. Washing these grains in hot water will wash away the wax stuck to them. b. Some iron filings mixed with feathers Moving a magnet above this will attract only the iron filings. c. small stones mixed with wheat grains The sieving method is used. The mixture is passed through a sieve. The small grains of wheat fall through the sieve holes, leaving behind the stones. d. Some paddy husk mixed with paddy grains Winnowing is used. The light husk gets blown away by the wind, separating from the paddy grains. e. Some chalk powder and salt powder When put in water, the salt gets dissolved. Chalk does not dissolve. This insoluble chalk is filtered out. Boiling and evaporating the salt solution leaves the salt behind.

E M B I B E

NEW INTEGRATED PRIMARY SCIENCE BOOK 4>Materials and Matter>Chapter 11 - The Study of Matter>EXERCISES

Lester Davidson Solutions for Exercise 2: EXERCISES

Author:Lester Davidson

Lester Davidson Science Solutions for Exercise - Lester Davidson Solutions for Exercise 2: EXERCISES

Attempt the free practice questions from Exercise 2: EXERCISES with hints and solutions to strengthen your understanding. NEW INTEGRATED PRIMARY SCIENCE BOOK 4. solutions are prepared by Experienced Embibe Experts.

Questions from Lester Davidson Solutions for Exercise 2: EXERCISES with Hints & Solutions

MEDIUM

4th CBSE

IMPORTANT

NEW INTEGRATED PRIMARY SCIENCE BOOK 4>Chapter 11 - The Study of Matter>EXERCISES>Q 1

To change things, we often use heat. Find out what happens to certain things when you heat them.

Substance	Method of heating	Changes brought about by heating
Egg	Boiling
Egg	Frying
Water
Sugar
Milk

MEDIUM

4th CBSE

IMPORTANT

NEW INTEGRATED PRIMARY SCIENCE BOOK 4>Chapter 11 - The Study of Matter>EXERCISES>Q 3

How may the following be separated?

Mixture	Method of separation
a. Some grains of rice stuck in a ball of wax
b. Some iron filings mixed with feathers
c. Small stones mixed with wheat grains
d. Some paddy husk mixed with paddy grains
e. Some powdered chalk and powdered salt

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