1. which of the following shows laterally inversion?
(a) plane mirror (b) concave mirrror (C) convex mirror (d) all of them
2. A ________ image is formed by the actual meeting of reflected rays.
3. what is lateral inversion?
Differntiate between the following-:
4. lense and mirror
5. concave mirror and concave mirror
6. luminous and non- luminous body
Give reason for the following
7. convex mirror is used as a rear view mirror.
high order thinking skills (hots)
8. how wil you distinguish between plane concave and convex mirror without touching them?
WHY LEAF IS CALLED FOOD FACTORY OF THE PLANT ?
Q.1 Fill in the blanks:-
Why are acids not stored in metal containers? Containers/vessels made from which materials are safe to store acids?
why is copper wire not used in the filament of a bulb or as a heating element of heater?what will happend if we use a thick tungsten wire in a electric bulb?
Test solution Effect on red litmus paper Effect on blue litmus paper Inference
Lemon juice No change Red Acidic
Tap water No change No change Neutral
Detergent solution Blue No change Basic
Aerated Drink Blue No change Basic
Soap solution Blue No change Basic
Shampoo Blue No change Basic
Common Salt solution No change No change Neutral
Sugar solution No change No change Neutral
Vinegar No change Red Acidic
Baking soda solution Blue No change Basic
Milk of magnesia Blue No change Basic
Washing soda solution Blue No change Basic
Lime water Blue No change Basic
Test solution Effect on turmeric solution Remarks
Lemon juice No colour change Acidic
Orange juice No colour change Acidic
Vinegar No colour change Acidic
Milk of magnesia Red Basic
Baking soda Red Basic
Lime water Red Basic
Sugar No colour change Neutral
Common salt No colour change Neutral
What about sugar and common salt with turmeric solution? How do we conclude about the nature?
identify from the following plants having unsexual or bisexual flowers:
papaya , mustard , rose , corn , petunia , cucumber.
1. which of the following shows laterally inversion?
(a) plane mirror (b) concave mirrror (C) convex mirror (d) all of them
2. A ________ image is formed by the actual meeting of reflected rays.
3. what is lateral inversion?
Differntiate between the following-:
4. lense and mirror
5. concave mirror and concave mirror
6. luminous and non- luminous body
Give reason for the following
7. convex mirror is used as a rear view mirror.
high order thinking skills (hots)
8. how wil you distinguish between plane concave and convex mirror without touching them?
1. A combination of two or more cells is called a _____________ .
2. The working of a an electric bulb, electric iron and the fuse is based on the
__________________ effect of current.
3. The filament of an electric bulb is made of ______________ and has
______________ (high/low) melting point.
4. Instead of electric bulbs, it is advisable to use ______________ and
__________________, in order to reduce wastage.
5. __________ is a safety device which prevents fires and damage to electricalQ1.Fill in the blanks:
1. A combination of two or more cells is called a _____________ .
2. The working of a an electric bulb, electric iron and the fuse is based on the
__________________ effect of current.
3. The filament of an electric bulb is made of ______________ and has
______________ (high/low) melting point.
4. Instead of electric bulbs, it is advisable to use ______________ and
__________________, in order to reduce wastage.
5. __________ is a safety device which prevents fires and damage to electrical appliances.
6. A current carrying coil wrapped around a piece of iron is called an __________.
7. ________________ performed experiments to prove the magnetic effect of
current.
8. _________________ and _____________ are devices which have
electromagnets in them.
Q2. Draw the symbols for the following:
WHY LEAF IS CALLED FOOD FACTORY OF THE PLANT ?
Q.1 Fill in the blanks:-
(i) Light always travels in a ____________..(ii) Change in direction of light after striking a polished surface is called ____________.(iii) The phenomenon of left appearing right and right appearing left on reflection from amirror is called _____________.(iv) Real images are always ____________ while virtual images are always __________.(erect/inverted)(v) The reflecting side of a concave mirror curves ____________ while the reflecting sideof a convex mirror curves ______________ (inwards/outwards)(vi) Concave mirrors from ____________ and ____________ images whereas the imageformed by a convex mirror is always ____________ (real/virtual)(vii) ____________ mirrors are used as rear/side view mirrors and ____________ mirrorsare used as reflectors of headlights of vehicles.(viii) A ____________ lens converges rays of light falling on it hence it is also called a____________ lens.(ix) A concave lens always forms a ____________ (real/virtual) image which is____________ (erect/inverted) and ____________ (smaller/bigger) than the object.(x) Formation of shadows suggest that light travels in __________ lines.(xi) A __________ lens is thicker in the middle and tapering at the edges.Q.2 Multiple choice questions (Choose the correct option)(A) A virtual image formed by a plain or a spherical mirror(a) is always inverted (b) is always erect (c) is erect or inverted depending on thedistance of the object from the mirror(B) which of the following images can a convex lens not produce?(a) Real, Magnified (b) Virtual, magnified (c) erect, virtual (d) erect, diminished(C) which of the following is true for a convex mirror?(a) It can only form virtual images (b) It can only form real images (c) It can form realor virtual images depending on the distance of the object from the mirror (d) It canform real or virtual images depending on the size of the object.(D) which of the following can not split light into its seven colours?(a) diamond cut in a special way (b) Prism (c) Convex Lens (d) Water droplets suspendedin the air. (E) Sodium chloride will turn(a) Blue Litmus Red (b) Methyl orange yellow (c) Red Litmus blue (d) None of these1. How does a plane mirror differ from a spherical mirror?2. State the law of reflection.3. How many reflected rays can be for a given incident ray falling on a plane mirror?4. Two plane mirrors are placed 900to each other. An incident ray AB falls on one ofthe mirrors at 450. Draw the path of the reflected ray.5. Write down five English alphabets which do not show lateral inversion on reflectionfrom a plane mirror.6. You are standing at a distance of 1m. from a plane mirror (a) What is the distancebetween you and your image (b) By how much distance does your image move fromyou if you had walked 2m away from the original position.7. Under what conditions should a concave mirror, a plane mirror, a convex mirror formvirtual images?8. (a) What type of mirror is used in the following and why?(1) In a search light (2) as a side view mirror in a car (C) as a shaving mirror (4)vigilance mirror in a big shop.(b) Why is light not visible through a bent pipe?(c) If we want to make fire with the help of a lens using the rays of the Sun, what kind oflens should be used and why?(d) What kind of mirrors do the two surfaces of a spoon act as?HOTS QUESTIONSQ.1 What will be the difference in the size of the image (of the same object) formed by asmall and a large plane mirror?Q.2 Identity three letters of the English alphabet or of your mother tongue whose mirror 3.Q.3 Car rear view mirrors carry a warning message that objects in the rear view mirrorare closer than they appear. Why do you think this is so?Q.4 How many images do you think will be formed if an object is kept between two planemirrors parallel to each other?Why are acids not stored in metal containers? Containers/vessels made from which materials are safe to store acids?
why is copper wire not used in the filament of a bulb or as a heating element of heater?what will happend if we use a thick tungsten wire in a electric bulb?
Test solution Effect on red litmus paper Effect on blue litmus paper Inference
Lemon juice No change Red Acidic
Tap water No change No change Neutral
Detergent solution Blue No change Basic
Aerated Drink Blue No change Basic
Soap solution Blue No change Basic
Shampoo Blue No change Basic
Common Salt solution No change No change Neutral
Sugar solution No change No change Neutral
Vinegar No change Red Acidic
Baking soda solution Blue No change Basic
Milk of magnesia Blue No change Basic
Washing soda solution Blue No change Basic
Lime water Blue No change Basic
Test solution Effect on turmeric solution Remarks
Lemon juice No colour change Acidic
Orange juice No colour change Acidic
Vinegar No colour change Acidic
Milk of magnesia Red Basic
Baking soda Red Basic
Lime water Red Basic
Sugar No colour change Neutral
Common salt No colour change Neutral
What about sugar and common salt with turmeric solution? How do we conclude about the nature?
identify from the following plants having unsexual or bisexual flowers:
papaya , mustard , rose , corn , petunia , cucumber.