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WorksheetsScience Quiz
Total questions: 20
Worksheet time: 20mins
A body covers half of its journey with a speed of 60 m/s and the other half with a speed of 40 m/s . Then average speed during whole journey is
0
50 m/s
48 m/s
52 m/s
A man covers 72 kilo meter distance in 2 hr. Find his speed
36 m/s
50km/ hr
10m/s
144km/hr
The to and fro motion of a pendulum is which type of motion
Rectilinear motion
Circulatory motion
Periodic motion
None of these
The time taken by Renu to reach her school from her home was 15 minutes. If her speed is 2 m/s ,then the distance between her home and her school is
1.8 km
1km
3km
2.5 km
Time period of a simple pendulum depends upon its
Mass of its bob
Length
Both a and b
None of these
The direction of flow of heat is
Always from hotter body to a cooler body
Always from cooler body to a hotter body
Always from a body of a lower temperature to a body at higher temperature
All the above are correct
In which of the following ways can heat flow from one body to another ?
By Conduction
By convection
By radiation
By all these
Birds glide effortlessly in the air with the help of
Conduction of heat in the air
Radiation of light through the atmosphere
Convection currents of air
Their strength
Acid present in vinegar is
Formic acid
Acetic acid
Sulphuric acid
Nitric acid
Reaction of an acid with base is
Decomposition
Combination
Redox
Neutralusation
Bases are
Have slippery feel
Tastes sour
Turn blue litmus red
All these are correct
Starch is a kind of
Carbohydrate
Fat
Protein
Vitamin
Which of the following parts of a plant are called "food factory"
Flowers
Seeds
Leaves
None of these
The function of the acid secreated by inner lining lining of stomach
Kills many bacterias
Makes the medium in the stomac acidic
Helps the digestive juices to act
All the above
Which one is incorrect about liver ?
It stores proteins and fats
It purifies blood
It removes and stores irons from dead red blood cells
It helps in digestion by producing bile
Green plants take in carbon dioxide from the air through
Root hair
Flower
Stem
Stomata on leaves
If a student rides his cycle on a straight road and does not speed up or slows down,he is travelling with a
Constant acceleration
Constant velocity
Positive acceleration
Negative acceleration
A glass tumbler cracks when a very hot water is poured into it because
It is not a strong metal
It expands equally from inside and outside
Glass is a bad conductor of heat
It does not expand much on heating
Nights are cooler in the desert because
Sand radiates heat less quickly as compared to earth
The sky is generally clear
Sand radiates heat more quickly as compare to earth
The sky generally cloudy
The intestinal juice changes fats into
Fatty acids
Glycerol
Both the above
None of these
