7/25/2019 Science Hhw (Copy)

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Holiday Home workClass-VII

Subject Science1. Make a project on photosynthesis. Conduct the following experiment: Take a potted

plant with broad leaves. Take two strips of black paper and cut out a small suare in

their center. Cover a part of two leaves with these paper clips. !eep the plant in the

sunlight for "#$ days. %bserve the difference in the color of the uncovered and the

covered portion of the leaf. &erform iodine test on this leaf. 'id you observe any

difference in result( )ow take the second leaf. *emove its stripe and expose the covered

part to the sunlight for "#+ days and do the iodine test again. *ecord and explain your

observation.,-upport your project with suitable diagramspictures/

". Make a $ page report on green house effect.

+. Collect following information from at least 10 children,also mention their names andage/ and find the average at which children loose their milk teeth.

2ge at which their first tooth fell.

2ge at which last tooth fell.

)umber of teeth lost.

)umber of teeth replaced.,do this in your activity file/

3. Make a $ page report on silk route.

$. &repare a presentation on the life cycle of silkworm using proper content and

photographs.,4ring it in a C'/

5. &aste different types of natural fibers ,like wool6silk6cotton 7 jute/and name their

sources. ,'o this in activity file./

8. &aste $ real samples with proper names of good conductor of heat 7 $ bad conductors of

heat in your activity file.

9. *ead ch#+ :iber to fabric and ch#3:;eat and prepare one crossword &u