PHYSICS
Answer any two questions from 1 to 3.each question carries 1 score.
1.Which among the following is a derived quantity?
a)Mass b)Displacement c)Volume d)Temperature
2.Cheetah is the fastest animal on land. Its speed is given in different
ways. Which among these is correct?
a)25 Meter per s b)25 m/s c)25 m/s2 d)25 m/s
3.Which is the correct statement?
a)Distance travelled and displacement of a mango falling from a
mango tree are the same.
b)Objects moving with uniform speed will have uniform velocity too.
Answer any six question from 4 to 10.each question carries 2 score.
4.Identify the relation between the first pair of words and complete the
second pair suitably.
a)Length : Metre
Time : _______
b)Speedometer : Speed
Sundial : _______
5. Find the odd one out from the following. Justify your answer.
(Metre,Light Year,Second,Astronomical Unit)
6.write the following units in the ascending order of their value.
A)Millimetre, Nanometre, Centimetre, Micrometre.
B)Quintal,Kilogram,Milligram,Gram.
7.10 turns of wire are closely wound around a pencil as shown in the
figure.When measured using a scale as shown,the length of total
turns is obtained as 25 mm.Then
a) What is the thickness of the wire? b) Express the thickness of the wire in centimetre.
8.The conversation between two students standing on the road side about a person inside a moving bus is given below.
Student 1 : "That person is state of rest"
Student 2 : "No, he is in motion"
Explain the possibilities of the correctness of these statements based
on the concept of a reference body.
9.Velocity of a car started from rest reaches 24 m/s in 4 s.
a) What are the initial velocity and the final velocity of the car? b) Calculator its acceleration?
10.Tabulate the following motions into those with uniform velocity and those with non uniforn velocity.
a) A stone thrown vertically up. b) Light travels through vacuum. c) A ball rolled up on a floor. d) Motion of minute hand of a clock.
Answer any two questions from 11 to 13.each question carries 3 score.
11.Two imissible liquids with different densities 810 kg/m3 and 1000 kg/m3 are taken in a jar.
a) From the given details identify the liquid with the density 1000 kg/m3 from the figure. b) Explain the reason for your conclusion. c)”When the liquids like petrol or diesel are on fire, never try to extinguish the fire using water”- explain the statement based on your conclusion.
12) The following figure is of a traffic sign board placed near school for road safety.
a) What does the board indicate? b) A motor bike rider travels 180 km in 2 hour through the road near the school. Calculate his average speed .Does he cross the speed limits as per Kerala Road Safety Rules. c) Which is the device used to find the speed in vehicles.
13) Examine the figure below.A man starts from A and reaches D through he points B and C.
a) Find the displacement and the distance travelled from A to D. b) Among quantities distance and displacement identify the victor quantity. c) Write an example fore a scalar and a vector quantity.
CHEMISTRY
Answer any five question from 1 to 6 (1 score each)
1.In which of the following three states,the distance between the
particles is maximum?
(Solid,Liquid,Gas)
2.Choose the monoatomic molecule from the bracket.
(Hydrogen,Oxygen,Helium,Nitrogen)
3.The apparatus used for separating the components from a mixture of
water and kerosene is ____________
4.Some pure substances are given below.
{Carbon Dioxde,Nitrgen,Water,Sugar}
Identify the odd one among these substances.
5.One of the following elements is named on the basis of color.
Find out this element.
(Polonium,Neptunium,Chromium)
6.Choose the correct statement from the following.
i. Molecule formed from more than two elementary atoms are called diatomic
molecule.
ii. All atoms of the same element show identical properties.
iii. Mixtures are formed by the combination of only one type of particles.
Answer any three questions from 7 to 10 9 (2 scores each)
7.Find out the relation and fill in the blanks.
Separation of common slat from sea water : evaporation
Separation of components from black ink :______(a)______
Separation of iron powder from sand : by using magnet.
Separation of tea dreg from tea :______(b)_______
8.Molecular formula of ammonia is nh3
a) Find the number of hydrogen atoms in this molecule.
b) How can you represent two molecules of ammonia?
9. Some substance and their boiling points are given in the table.
(i). Which method can be adopted for the separation of components from a mixture of ethanol and methanol. [ Distillation,Fractional Distillation,Sublimation] (ii). Give the reason for choosing this method for the separation.
10. Organise an experiment to prove that air requires space to occupy,by
using the material given below.
[Materials:Trough,Small Tumbler,Water]
Answer any three question from 11 to 14 (3 scores each)
11.Match the following.
12.Examine the figure given.
i. GIVE THE NAME OF THIS APPARATUS?
ii. WHICH PROPERTY GIVEN IN THE BRACKET IS THE BASIS FOR CHOOSING THIS
APPARATUS FOR THE SEPARATION OF COMPONENTS OF MIXTURE?
(COLOUR DIFFERENCE,MASS DIFFERENCE)
iii. WRITE ONE INSTANCE IN WHICH THE COMPONENTS OF A MIXTURE ARE SEPARATED
USING THIS APPARATUS.
13. Complete the table.
14.The chemical equation of the reaction between zinc and hydrochloric acid is given below.
ZN+2 HCI-ZNCL2+H2
a) write down the reactants and products of this reaction. b) this chemical equation is not balanced.why? c) balance this equation.
BIOLOGY
Answer any 3 from question 1 to 4.each question carries 1 score.(3×1=3)
1.Identify the cell organelle.
2.Correct mistakes if any, in the underlined part of the given statements.
a. Collenchyma is seen in the soft parts of the plant. b. Sclerenchyma is made up of cells that are uniformly thick allover the cellwall. c. Muscular tissue can transform into other type of cells. d. Blood carries out the conduction of material and makes the body resistant to diseases.
3.From the pair of scientists given below,choose the correct pair related to the formulation of cell theory.
- Robert brown and robert hook
- M.J.Schleiden and theodor schwann
- Robert brown and rudolf virchow
- Theodor schwann and robert hook
4.Identify and name the connective tissues performing the following functions.
a.Connects other tissues. b.Provides support,protection and definite shape to the body.
Answer any 4 from questions 5 to 9.each question carries 2 score. (4×2=8)
5.’Nucleus is the regulatory centre of cell-evaluate the statement by giving reason.
6.Certain parts of a cell are given below. Choose suitable parts to complete the table.
- Cell Wall
- Nucleus
- Lysosome
- Cellmembrane
- Centrosome
- Vacuole
7.Analyse the given statement and answer the questions. “Consists of cells that can contract and regain the original state” a.Name the animal tissue mentioned here. b.Write its functions.
8.Complete the illustration related to plastid.
9.Identify the animal tissues a and b write any one function of each.
Answer any 3 from questions 10 to 13.each question carries 3 score.(3×3=9)
10.Various stage in the preparation of a slide to observe the plantain root cells through a microscope are given in the box. Arrange them in correct order.
A.Put the material to be observed in a petridish containing water. B. C. D. E. F. G. H.Wipe out excess glycerine and observe through a microscope.
11.A portion of the science diary of a student is given below.analyse it and answer the questions.
a)Name the cells indicated in the diary. b)How does they compensate the destruction of cells in the tissue? c)What is the importance of these cells in modern medicine?
12.Observe the diagram of vascular tissue and answer the questions.
- Identify (b)
- Why are they known as vascuar tissues?
- Write two peculiarities of each of them.
13.Observe the diagram and answer the question.
Name the parts a and b write their function.