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(01) What is the name of the microbial activity based on foods like fish and meat ?
(02) An example for a plant which is adapted to absorb atmospheric water vapour is,
(03) Plant leaf that helped to water conservation and propagation is,
(04) A plant which stored food in aerial stem is,
(05) What is the correct answer that shows radially symmetrical and bilaterally symmetrical animals in order ?
(06) The non – observable microorganism group under light microscope is,
(07) What is the group of animals which shows both forms of polyps and Medusa ?
(08) A harmful effect of the microorganism is,
(09) The factors which can be considered as the factors that control the functioning of microbes on the foods keep in the refrigerator are,
(10) The elements of the carbon dioxide are,
(11) The mass of a unit volume of a given substance is,
(12) The answer which containing both element and compound is,
(13) A physical property that can be used to determine the purity of a solid is,
(14) When hammered a piece of sulfur after putting it into a cloth bag, it was broken into small particles. The physical property of sulfur could be,
(15) The states of the matter with high density are,
(16) Which one hasn’t a constant composition,
(17) The diagram shows the outline of a leaf that occurs in photosynthesis.
A and B respectively are,
(18) What is the correct answer of the following statements on the mass of the equal volume of water and salt ?
(19) The non – metal with electrical conductivity is,
(21) Here are some observations on the melting point of a liquid.
A. Solid becomes liquid.
B. Temperature is gradually increasing.
C. Temperature does not change.
What can be the correct observations ?
(22) Mercury is used as a liquid in thermometers. Here are some statements made by a student about mercury.
A. It is a pure substance.
B. It is a non – metal.
C. It expands when heated.
The correct statements from the above are,
(23) Some of the statements about musical tones are given below.
A. It will never be oppressive.
B. It will be a rhythmical play or songs.
C. It is used to promote the quality of life.
The correct statements from the above are,
(24) What is the correct statement about the noise made by the saw blade when applying a force at the B end and when gradually increasing the AB length ?
(25) What is the correct answer only with matters ?
(01) Below diagrams show some animals which are used for animal classification.
(i.) Earthworms and Rat snakes are classified into two main groups. What is the main internal character used for that?
(ii). Snail belongs to the group mollusca.
a) Which is the character that can be observed in some organisms of that group as in the figure?
b) Name an organism belonging to Mollusca which is not having the above character.
c) What is the locomotive organ of the snail?
(iii). Rat snake is a vertebrate which is well adapted for the terrestrial environment .
a) What is the class that rat snake belongs to?
b) Select other common characteristics of above class except having lungs for gas exchange.
(iv.) The animals of the group which earthworm belongs to are named as segmented worms.
What is the reason for naming them as ” segmented worms ” ?
(v.) Select the animals from above for the following characters.(Drag and drop)
a) Segmented body with jointed appendages
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b) Gills for respiration
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c) Forelimbs are modified into wings
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(02.)
(A) Experiment is given below to study about the structure of a matter. Structure of the matter is shown by the glass marbles in the beaker.
(i.) What is the part of the matter represented by glass marbles?
(ii.) What is the physical state of this matter according to the arrangement of the glass marbles?
(iii.) Write an observation which can be obtained by this activity.
(B) Physical properties of the matter can be varied with the structure of the matter. Experiment given below is designed to study about a physical property of matter and observations are mentioned below. X and Y both have the ability to flow.
(i.) Write examples for the things which is used for X and Y
(ii.)
a) Explain the reason for the observations of B
b) Select the property of that matter according to the above reason.
(iii.) Select an equal physical property of X and Y except the ability to flow.
(03.)
(A) The concept map which is used to classify the matter is given below.
(i.) Use the most suitable words for P, Q, R and S(drag and drop)
P
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Q
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R
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S
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(B) Below experiment has been designed to show a physical property of a metal.
(i.) What observation can be taken after a few minutes?
(ii.) What is the main physical property of margarine which is used to obtain the above observation?
(iii.) What is the observation when using a coconut-shell spoon instead of a metal spoon?
(iv.) What is the reason for the above observation in part ” V”?
(v.) What is the elemental composition of water?
(04.)
(A) Following is a banyan tree.
(i.) What could be the root system of this plant among the two main root systems?
(ii.) Select a characteristic which can be used to determine the above answer with the help of the image.
(iii.) What is the function of prop roots to the plant for the plant given by the prop roots?
(iv.) Select a name of an adventitious root except prop root and mention the function of it.
(B) Following are some of the plants identified by the students.
( Carrot, Ginger, Sweet potato, Kithul, Rose, Cactus, Akkapana, Curry leaves )
Give one example for each of the following among the above plants.
(i.) Stored foods in the tap root.
(ii.) Stored foods in the underground stem.
(iii.) Plant which adapted to perennation.
(iv.) Stored water in the stem.
(v.) Plant which does propagation by roots.
(05.)
A) The following diagram shows a gadget created by a student at home in order to observe the microbial activity on food.
(i.) What is the microbial group used as “P”?
(ii.) What is the method used by the student to speed the microbial activity?
(iii.) Mention the observations of the following after a few minutes.(Drag and drop)
a) Inside the bottle.
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b) of the balloon.
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(iv.) After removing the balloon, a saline tube was inserted into the lime water.
a) What could be the observation?
b) What could be the released gas according to the above observation?
B) Microbes affect well and adversely for both man and human activities.
(i.) Among the changes of the foods due to microbial activity,
a) Select a change that can be observed.
b) Write a change that cannot be observed.
(ii.) Mention the group of pathogens which cause the following diseases.
a) Amoebiasis.
b) pityriasis
(iii.) Write a beneficial effect of micro – organisms in the medicinal field.