NEW ST.
JOSEPH’S ENGLISH PRIMARY & HIGH SCHOOL
BTM LAYOUT, BANGALORE -76.
DATE:24 /03/25 SUMMATIVE ASSESSMENT II-2025-26 TIME: 3Hrs
CLASS:IX SUB: SCIENCE
MARKS: 80
PHYSICS
I. Choose the correct answer from the given options. [3x1=3]
1. What would be the displacement of a particle moving in a circular path of radius r
after a displacement of half a circle?
a. 2πr b. πr c. 2r d. Zero
2. The formula to find the work done is
a. W = F+s b. W = F.s c. W = F-s d. W = F/s
3. Which of the following is the SI unit of force
a. kg m/sec2 b.kg m c. Newton metre d. newton
II. Answer the following questions. [3x1=3]
4. Write the formula to find the magnitude of the gravitational force between the
earth and an object on the surface of the earth.
5. When do we say that work is done?
6. What is sound and how is it produced?
III. Answer the following questions. [2x3=6]
7. Why does an object float or sink when placed on the surface of water?
8. What are wavelength,frequency, time period and amplitude of sound wave
IV. Answer the following questions. [3x3=9]
9. A bus decreases its speed from 80 km/ h to 60 km/ h in 5 s. Find the
acceleration of the bus.
10. An object of mass 40 kg is raised to a height of 5 m above the ground. What is its
potential energy?
11.a. Define Newton's second law of motion
b. why do you fall in the forward direction when a moving bus breaks to a stop and fall
backwards when it accelerates from rest
V. Answer the following questions. [1x4=4]
12. a. What do you mean by buoyancy?
b. Define thrust and pressure and give its SI units
c. Define Archimedes principle.
13. a. What is the audible range of hearing for human beings
b. Which wave property determine pitch
c. Calculate the wavelength of sound wave whose frequency is 220Hz and speed is 440
m/s in a given medium.0
Chemistry
I. Choose the correct answers
(3X1=3)
1. Tyndall effect can be observed in which of the following solution a
a) colloidal solution b) alcoholic solution c) electrolytic solution
d) none of these
2. which of the following elements give polyatomic molecules
a) Ne b) P c) Ni d) Si
3. Isotopes differ in
a) Electrons b) Protons c) Neutrons d) all of these
III. Write the answer in two or three sentence – any four
(4X1=4)
1. What are canel rays?
2. State law of conservation of mass illustrate with an example
3. Define molecule , give two example.
4. What is suspension , colloid ?
5. Name the SI unit of the following
a) Mass b) Volume
IV. Write the answer in one or two sentence
(2X2=4)
1. A) Give two points of different between physical change and chemical
change , give two examples of each.
(OR)
B) On the basis of Rutherford’s model of an atom which sub atomic
particle is present in the nucleus of an atom?
2. A) With the help of alpha particle scattering experiments, explain that an
atom has lots of empty space inside it
(OR)
B) How was matter classified by early Indian philosophers?
IV. Answer the following question
(3X3=9)
1. a) Describe JJ Thomson’s model of the atom with diagram
b) Explain the Rutherford’s model of the atom write its drawback
2. Give Reason
a) A Wooden table should be called a solid
b) A gas exerts pressure on the wall of the container
c) Water at room temperature is a liquid
3. a) Is it possible to see atoms with present days modern technology?
Explain your answer
b) find the ratio by number of the atoms for a water molecule
(OR)
a) How are sol, solution and suspension different from each other?
IV. Write the answer question
(4X1=4)
1. a) What is a mixture? Write homogenous, heterogeneous mixture with
suitable examples of each
b) Explain with examples Isotopes and Isobars and two uses of Isotopes
Biology
I. Choose the correct answers
(3X1=3)
1.Which cell organelles that are only present in plant cell is
a. Mitochondria b) Nucleus c) Endoplasmic reticulum d) Plastid
2.Voluntary muscles are found in
a) uterus b) legs c) iris of the eye d) ear
3.Inland fisheries is referred to
a) Culturing fish in seawater b) culturing fish in fresh water c) extraction
of oil from fish d) Deep Sea fisheries
III. Write the answer in two or three sentence - (4X1=4)
1. Name any two foreign breeds of cow and hen in India
2. Define cell division how does an amoeba obtain its food
3. Name the type of simple tissue ?
4. What are the functions of the stomata?
IV. Answer the following question (3X2=6)
1. a) Draw a neat labelled diagram of a neuron
b) How is water transported from root to the leaves
2. How is prokaryotic cell different from eukaryatic cell with examples
3.What is different between PER and SER?
IV. Answer the following (3X3=9)
1. Give three points of difference between mitotis and meiotic division of
cells and draw a diagram
(OR)
Define conductive tissue of plants How are they different from each other
2. a) What are the advantages of intercropping and crop rotation?
b) How do stage grain losses occur?
3. a)Why is plasma membrane called a selectively permeable membrane
b)Name a type of connective tissues.
IV. Write the answer question
(4X1=4)
1. a) Draw a neat labelled diagram of a plant cell
b)Difference between animal cell and plants
V. Passage based questions
(5X1=5)
Due to excessive use of chemicals Raghuveer noticed that the
productivity of his field has some what decreased. He discussed this with his
son Gopal . Gopal obtained the information from kisan channel and asked his
father to go for intercropping and crop rotation. The used farm wastes as
manure instead of fertilisers and had a good yields.
Answer the following question based on the above information.
1. Gopal suggested a farming practice with number no or minimal use of
chemicals what is it called?
2. How can the recycling of organic wastes being done in the fields?
3. Why are manure and fertilisers used in field?
4. Why is organic matter important for crop production especially for clayey
soils?
