N.C.E.R.T Class 9 Science
Sample Paper 2
Duration:
3 hrs Total
Marks: 80
General Instructions:
●
The question paper
is divided into five sections – A, B, C, D, and E.
●
All questions are
compulsory and you should attempt all sections.
●
In sections B, C,
D, and E you have an option to answer any one question.
●
Questions 1 and 2
in Section A carry one mark.
●
Question 3 to 5 in
Section B carry two marks.
●
Question 6 to 15
in Section C carry three marks.
●
Question 16 to 21 in Section D carry five marks.
●
Question 22 to 27
in Section E are based on practical skills. Each question carries two marks.
You can answer the questions in brief.
Section
A (1 mark each)
Q1: What is Evaporation?
Q2: Which man-made compounds
cause ozone-layer depletion?
Section
B (2 marks each)
Q3: Describe how evaporation
causes cooling.
Or
Give two
differences between evaporation and boiling of a liquid.
Q4: A saline water solution
contains 50 grams of salt dissolved in 400 grams of water. Calculate the
concentration of the solution in terms of mass-by-mass percentage of the
solution.
Or
What is a solution? What are the components of a
solution?
Q5: what are plastids? What
are the types of plastids?
Section
C (3 marks each)
Q6: Give any 3 properties of
metals.
Or
Give any 3 differences between mixtures and compounds.
Q7: What are ions? Give two
examples of ionic compounds.
Q8: Give three observations
from Rutherford’s alpha-scattering experiment.
Q9: Describe tissues. Give
the two main types of plant tissues.
Q10: Beginning from rest,
Batman accelerates his Batmobile to reach a velocity of 60 meters per second in
10 seconds. Then he applies the brakes and the velocity of the Batmobile
decreases to 10 meters per second in the next 1 second. Calculate the
acceleration of the Batmobile in both cases.
Q11: What is the work that
must be done to increase the velocity of a bike that weighs 200 kg from 20 m/s to
30 m/s.
Q12: Draw and label a diagram
showing the auditory parts of the human ear.
Q13: What are acute and
chronic diseases? Give an example for both.
Or
What are infectious diseases? Give two ways that an
infectious disease may spread.
Q14: Draw a diagram to explain
the nitrogen cycle in nature.
Q15: Give 3 factors for which
crop variety improvement is done.
Section
D (5 marks each)
Q16: Give any 5 postulates of
Dalton’s atomic theory.
Or
(i)
Give the chemical formulae of (a) sodium oxide and (b)
sodium sulfide (c) MagnesiumHydroxide.
(ii)
Give the names of the following compounds (a) Al2(SO4)3 (b) KNO3
Q17: What are Neurons? Draw a
clear and labeled diagram of a neuron.
Q18: (i) What are the 7 chief
classification groups used to classify living organisms? (ii) Name the 5 kingdoms
into which all living organisms are classified.
Q19: (i) State Newton’s three
laws of motion.
(ii) Find the value of the constant force that is
applied for 1 second on a 10kg object to increase the velocity of the object
from 5 m/s to 10 m/s.
Q20: What is the Universal Law
of Gravitation? Obtain a Mathematical equation for it. Also, give two points
highlighting its importance.
Q21: List 5 Differences
between Potential energy and Kinetic energy.
Section
E (2 marks each)
Q22: We encounter many animals
on a day to day basis. Some of these animals are also kept as pets in human
homes, such as dogs. How can dogs be classified scientifically?
Q23: We come across a wide
range of motions every day. Give an example of acceleration which is in the
direction of motion and acceleration which is against the direction of motion.
Q24: Give two examples where
we experience inertia in our day to day lives.
Or
Q24: List two situations
wherein the third law of motion can be observed.
Q25: Describe any 2 situations in which we can feel
the effects of buoyancy.
Q26: In high-speed aircraft
testing zones, the windows of buildings are reinforced. Why is this important?
Q27: Give two examples of
diseases which may arise from the formation of puddles due to excessive rain
and poor drainage systems.
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