Page 27 - ICSE Chemistry 8

B. Observe the given image carefully and answer the following
ques ons. + O 2

1. What does the image represent? What kind of change is
shown in the image?
2. What happens to the mass of ma er a er burning?
+ CO 2 + CO + NO 2
3. Jus fy the law of conserva on of mass in this change
shown.

APPLY YOUR LEARNING

A. Avni has been asked to infer the physical state of a substance in which par cles possess the maximum
intermolecular force of a rac on. Can you help her in iden fying the state of the substance?

B. Which of the following substances has the minimum intermolecular force of a rac on: air, table,
water?
C. Prateek is unable to understand why molecules in gases move away from each other. Can you tell him
the reason for the same?

LIFE SKILLS

Discuss various examples from your surroundings where change of state of ma er is observed.
(Observa onal skills)

Create a PowerPoint presenta on based on your observa ons and give it a suitable heading.
Present it in the class.

INTEGRATE YOUR LEARNING

Integrate with Physics

Name various measuring devices that can be used to weigh the chemicals during a chemical reac on to
jus fy the law of conserva on of mass. Also measure the mass of some ice cubes before mel ng and a er
some me when it changes to water. Record the masses using a measuring device and compare.

PROJECTS AND ACTIVITIES

Crea ng a Presenta on

Create a PowerPoint presenta on on the topic ‘Kine c molecular theory of ma er’. Insert related
informa on, images and videos using the Internet. Format the presenta on as per your choice.
Making a Chart
Make a chart to show the arrangement of molecules in solids, liquids and gases. Describe the images
properly and give a suitable heading.

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