SHAMROCK PRERNA SCHOOL

Subject- Science

Unit Test -II

M.M- 20

Name –

Q1.Multiple Choice Question:-                                     (2)

i)How many teeth does a child of age 3 have ?

a) 20

b)15

c) 32

d) 30

ii)The hardest part of teeth is

a) Enamel

b) Dentine

c) Pulp

d)Gum

iii)Which of these is made up of molecules ?

a) Solid

b) Liquid

c) Gas

d) All of these.

iv) The distance between the  molecules of which of these is the highest

a) Solid

b)Liquid

c) Gas

d) All of these

Q2Write True of False                                                       (2)

i)Air is not a matter since we cannot see it.

ii)Solids and liquids have definite volume .

iii) Every time a tooth falls off, a new tooth grows in its place.

iv) Microbes that causes disease are called germs.

Q3.Name these :-                                                                    (4)

i)The portion of a tooth above  the gum.____________

ii) The doctor who treats your teeth .____________

iii) The solid that is dissolved in a solvent.___________

iv) Atoms combine in various ways to form them._________

Q4Mention any one disease each caused by the following:-       (2)

i)Bacteria ____________

ii) Viruses_____________

iii)Protozoans___________

iv) Fungi______________

Q5.What are each of these useful for?                           (2)

i)Incisors ________________________

ii)Canines________________

iii)Premolars and molars________________________________________

Q6.Answer the following questions .                            (8)

i)List two  ways in which microbes are  useful to us.

ii) Is air matter? Why ?

iii) Why do gases  not have definite shape or volume ?

iv) What is matter made up of ?

 

 

 

 

 

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