• #### Class 7 Science Study Material

An Educational platform for Preparation and Practice Class 7. Kidsfront provide unique pattern of learning Science with free online comprehensive study material in the form of QUESTION & ANSWER for each Chapter of Science for Class 7. This study material help Class 7, Science students in learning every aspect of Heat . Students can understand Heat concept easily and consolidate their learning by doing Online Practice Tests on Science ,Heat chapter repeatedly till they excel in Class 7, Heat . Free ONLINE PRACTICE TESTS on Class 7, Heat comprise of Hundreds of Questions on Heat , prepared by the highly professionals team. Every repeat test of Heat will have new set of questions and help students to prepare themselves for exams by doing unlimited Online Test exercise on Heat . Attempt ONLINE TEST on Class 7,Science ,Heat in Academics section after completing this Heat Question Answer Exercise.

Unique pattern

• Topic wise:Heat preparation in the form of QUESTION & ANSWER.
• Evaluate preparation by doing ONLINE TEST of Class 7, Science ,Heat .
• Review performance in PRACTICE TEST and do further learning on weak areas.
• Attempt repeat ONLINE TESTS of Science Heat till you excel.
• Evaluate your progress by doing ONLINE MOCK TEST of Class 7, Science , All TOPICS.

##### To search for targets and threats in the surrounding sea and air, submarines make use of

a) Kaleidoscopes.
b) Periscopes.
c) Magnifying glass.
d) Rear view mirror.

##### Convex mirror

a) Has a reflecting surface that bulges inward.
b) Has a reflecting surface that bulges outward.
c) Is also called a converging mirror.
d) Is also called a plane mirror.

##### Image formed by a plane mirror is

a) Real in nature.
b) Virtual in nature.
c) Diminished compared to the object size.
d) Enlarged compared to the object size.

##### An image formed by a plane mirror is

a) Upside down.
b) Equidistant from
c) Smaller than the object.
d) Bigger than the object.

##### By using a convex mirror, we can see an image that is

a) Real, inverted and enlarged.
b) Virtual, erect and diminished.
c) Real, erect and diminished.
d) Virtual, erect and enlarged.

##### Transparent glassses which are thicker in the middle than at the edges are

a) Concave lenses.
b) Used in kaleidoscope.
c) Used in periscope.
d) Convex lenses.

##### The nature and size of an image depend upon the

a) Time of conducting the experiment.
b) Position of the object.
c) Kind of the object.
d) Position of the object in case of mirrors only.

##### Concave lens is also known as

a) Diverging lens.
b) Converging lens.
c) Plane lens.
d) Magnifying lens.

##### Sunlight consists of

a) Black colour only.
b) Five colours.
c) Seven colours.
d) Blue colour.

##### The correct sequence of seven colours of a rainbow is

a) Blue, Orange, Red, White, Purple, Yellow, Green.
b) Violet, Blue, Indigo, Green, Red, Yellow, Orange.
c) Violet, Indigo, Blue, Green, Yellow, Orange, Red.
d) Violet, Red, Orange, Yellow, Green, Indigo, Blue.

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