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: To study the effect of heat on a substance.
Apparatus : You are given a bottle with a rubber balloon fixed at its mouth. You are also given hot water in one beaker and cool
water in another beaker.
Proceed as follows, take observations and answer the questions given below.
Procedure : (1)
What happens when the bottle is held in the cool water ? What happens when the bottle is held in the hot water ? Briefly Explain the difference in observation in (1) to (2).
Instead of holding the bottle in hot water, if you heat the bottle itself willthere be any change in your observarion ? Why ? (5) State the property verified by the above experiment.
: To study the physical property of a substance.
Apparatus : Spoons of aluminium, steel and plastic, a piece of cloth, a light substance hanging from a stand (or a pith ball
pendulum)Proceed as follows and answer the questions.
Procedure and Questions :
(1) Take the aluminium spoon near the hanging substance but do not allow it to touch it. What is its effect on the (2) Rub the same spoon well against the piece of cloth and take it again near the hanging substance. What is its (3) Taking the steel spoon repeat the activities (1) and (2) above. Write down the effect of steel spoon on the (4) Taking the plastic spoon repeat the activities (1) and (2) above and write down the effect of plastic spoon on (5) When the three spoons rubbed against the piece of cloth are taken to the hanging substance do you notice any change in their effect on the substance? If so, mentionit.
(6) From the above observations what are the two substances that show identical properties ?(7) A magnet attracts a piece of nail. Do you find any such phenomemon in this experiment ? If so, mention it.
: To study properties of two liquids.
Liquids A and B are given in two bottles / beakers, same liquids are given in test tube A & B Procedure : (1)
Take one pea in each hand and bring it close to top of the test tube. Drop both peas simultaneously in thetest tubes. Observe the peas.
Take liquid A in test tube C.
Pour some liquid B from the bottle / beaker in that test tube observe both the liquids.
Write answers of the following questions in your answer paper.
(1) a) In procedure 1, In which solution pea reaches bottom of the test tube first?b) From the above answer find in which solution pea has more velocity ? Difference in the velocity of the peas in liquid A & B is related to whichproperty of the liquid ? a) From Observation in procedure 2, state, out of A & B which solution has more density ?b) Give reason for above answer.
a) If liquid A & B are poured on the top of a slope, which liquid will reach first at the bottom.
b) Give reason for the above answer.
: To identify the nature of the gas present in the exhaled air.
Procedure : (1)
Take a little coloured water, given to you in test tube. Blow air from your mouth in it with the help of a straw/glass tube for 2-3 minutes. Do you observe any change in the colour of the water ? Again take some coloured water in another test tube. Add to it the given acid drop by drop. Do you noticeany change ? Take the coloured water in a third tube and add to it some plain water. Do you notice any change ? Questions : (1)
Write down your observation in Activity (1) Write down your observation in Activity (2) Write down your observation in Activity (3) What are the additional constituent present in the exhaled air ? Which of these constitutents might have a affected the coloured water in activity (1)? From your observations in activity (1) and activity (2), do you find any similarity between an acid and someconstituent of the exaled air ? If so, name that constituent.
: To study the propertise of the given substance.
Procedure & Questions :
Proceed as follows using the apparatus and material given to you and answer the quesions on the basis of yourobservations.
(1) Take a pinch of the substance and feel it. Does it like maida (Wheat flour) or common salt ? Take a little water in a test tube. Add to it a pinch of the substance. Shake the test tube and see whether itdissovle in water.
Dip your fingers in the liquid and feel it. Is it cool, soapy or oily ? Add blue and red litmus papers to the liquid in the test tube. What colour-change to your notice ? Drop a little acid in the liquid in the test-tube, using a dropper and note down your observation.
: To Study Changes.
Procedure : (1)
Take some water in the test tube. Add pinch of salt in it. Shake the test tube and dissolve the salt.
Take pinch of Calcium Carbonate / Piece of chalk in the given test tube. Add hydrochloric acid to it observethe change.
Tear the given piece of paper into two. or Brake the given chalk.
Write the types of changes observed in the above experiments in the given table.
Observation table : (1) Give example of a change which is natural but harmful to human being.
(2) Maize turning into popcorn is a controlled or uncontrolled change ? Give reason.
Observe the experiment. Fill in the blanks in the following sentence. (Write only proper words on the
answer sheet)
________________________ gas is evolved during _____________.
Observe the specimens. Write the alphabet for the following.
Specimen with nonfunctional mature ovary.
Complete the sequence to show the hierarchy of classification.
Observe the specimens. Write the alphabet for the following.
Write the division of the specimen A and B.
Identity the acid present in specimen A and B.
Find the odd one out with respect to the layers of the paricarp and state the reason for it.
Fill in the blanks with one word to describe the structure of the given specimen.
It is elongated.
The middle portion is ________
The extremities are _________
than the middle portion.
Identify the specimen and state the adaptation of the seeds.
Find out the density of the wheat grains per unit area.
(a) Classify the given specimen carefully on the basis of the growth of its STEM.
(b) Give reason for your classification.
(a) How long does the specimen kept before you, take to complete its Life Cycle ?(b) What are such plants called ? Observe the Specimen kept before you. Name the Tissue cells of the flag marked regions.
(a) Three Speciments are kept before you. Find the odd one out, based on its origin.
(b) Give reason for your answer.
Critically observe the Speciments Kept before you.
(a) Find the odd one out.
(b) Give Reasons for your answer.
In which part of the Alimentary Canal does the food stuff kept before you, starts getting digested first ? (a) State the body covering of the specimen kept before you.
(b) Name its Habitat (a) Where does the blood from the flag marked region get pumped ?(b) For what purpose ? Observe the given specimens. Which out of these cannot be degraded by Biological agencies ? Out of the given specimens which one is the Richest Source of Vitamin B ? SAMPLE - 3
Observe the pods. Find out the average number of speeds present.
Observe the specimens A, B and C Name the specimen having
(i) Highest Protein Content
State the aim of the experiment.
Classify the following specimens A and B based on the presence or absence of the spinal cord.
Observe the specimen.
(i) Name the part used to acquire food.
(ii) State whether the wings of the specimen are structurally simillar to the wings of the birds.
Find the odd man out considering the food intake.
Observe the following specimens A, B, C and D. Identify the specimen with meristem tissue.
Observe the following edible specimens A, B and C. Answer the following questions.
(i) How is A different from B and C ?
(ii) How is B different from A and C ?
Identify the following specimens A and B.
Birth date of the baby - 1st Jan. 2007
Observe the chart. Replace the following alphabets appropriately(i) A(ii) X Answers :
a) Sago b) Soyabean c) Oats i) Soyabean ii) oats Ganaung’s experiment : Light is necessary for phtosynthesis (A) Moss (B) Fungus (C) Molusca Shells; Moss is odd man out (A) Garlic twig without tip (B) Vinea taig (C) Goosberi (D) Flower (Zandu) (A) Honey (B) Jaggary (C) Date : A) is animal origin B) is man made (I) A - Vaccine (II) K - JaN 2007 at birth or immediately after birth Remember the following information regarding roots of plants with their examples.
Modifications of Tap Root for food storage :(a) Fusiform : (Tapering at the end) : Raddish, Carrot Napiform : (spherical at one end & tapering at other end) Turnip, beet.
(Tap root arises from radicle present in dicotylidous) Modifications of Adventitious roots : (Adventitious roots arise from any plantpart like stem, leaf)(a) Fasciculated i.e. food storing : Shatavari Epiphytic roots : (velamen tissue present) : Vanda, Orchids Climbing roots : (Arise from nodes of stem) : Piper, Money plant Prop roots : (Growing vertically down ward) : Ficus (Wad) Leaf roots : (Root arises from the marginal nodes of leaf) : Bryophyllum Respiratory roots : Pneumatophores in Rhizophora(Roots modified for respiration)


Microsoft word - terms of use_spanish_11-feb-2009.doc

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