Question

Q.1[A]Fillintheblanks. 2

1.Ofthetotalwateravailableontheearth,freshwaterforms_______percent.

2.________,___________and_________arethethreestatesofsubstances.

3.Naturalresourcesshouldbeusedcarefullyand____________.

4.__________crystalsdonotmeltonheating..

[B]Matchthepairs. 2

A B

1.Hardness a)Rain

2.Watervapour b)Combustion

3.Brittleness C)Ironnail

4.Oxygen d)Chalk

Q.2[A]Statewhethertrueorfalse. 2

1.Landandsoilarethesamething.

2.Thestateofasubstancechangesifitisheated.

[B]Completetheanalogy. 2

1.Boilingpoint:100℃::Freezingpoint:__________

2.Neon:Decorativelight::Xenon:____________

[C]Define.

1)Solubility. 1

Q.3Answerinonesentenceeach. 3

1.Whatisthechangeofstateofthesubstances?

2.Whatisatmosphere?

3.Whatarethenaturalsourcesofwater?

Q.4[A]Answerthefollowingquestions(any3). 6

1.Howissoilformed?

2.WhatisElasticity?

3.Writeshortnoteonfreezingpointofwater.

4.Drawaneatlabelleddiagramofproportionsofthevariousgasesintheair.

[B]Givereasons(any1). 2

1.Thescarcityofwaterhasbecomeaseriousproblem.

2.Itissaidthatwaterislife.​

Answer 1

In the body, there are three types of muscle: skeletal (striated), smooth, and cardiac.

Skeletal Muscle. Skeletal muscle, attached to bones, is responsible for skeletal movements. ...

Smooth Muscle. ...

Cardiac Muscle.