Solutions of PRACTICE WORKSHEET 1 (Class 7)
Solutions of PRACTICE WORKSHEET 1 (Class 7)
Acid turns blue litmus
Which of the following is a strong acid?
Which one is an organic acid?
Which one of the following is a natural indicator
Product of a neutralisation reaction are always
In case of indigestion, we use
Sodium hydroxide is found in
Turmeric is a natural indicator. On adding its paste to acid and base separately, which colour would be observed
Sour things contain
Sting of an ant contains
In insects, air enters the body through
During the process of exhalation, the ribs move ________.
Plants breathe through their stomata located in their
Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?
Breathing is a
Yeast is used in wine and beer industries because it respires
Blood is red coloured due to presence of
Inhalation is the
The opening of the pharynx to larynx is guarded by
Instant source of energy is
In plants, Water is transported through
The absorption of nutrients and exchange of respiratory gases between blood and tissues takes place in
The urine from kidneys passes to urinary bladder through
Which chamber of heart receives oxygenated blood from heart?
In a tall tree, which force is responsible for pulling water and minerals from the soil?
The function of the Blood is to transport
Blood circulation in human being was discovered by
Function of heart is
Water absorption through roots can be increased by keeping the plants
Some land animals like birds, lizards, snakes excrete a semi-solid, white coloured compound, that is
The process of fusion of the female and male gamete is called
In flowering plants, male gamete is formed inside
Mature ovary forms the
Lila observed that a pond with clear water was covered up with green algae within a week. By which method of reproduction did the algae spread so rapidly?
Which of the following do not produce unisexual flower?
Seeds of drumstick and maple are carried to long distance by wind because they possess
A spore producing plant is
Reproduction in Bryophyllum takes place by its
A bulb like projection coming out the yeast cell is called
Transfer of pollen grains from anther to stigma is called
Electric current is the flow of
Magnetic effect of electric current was observed by
A device which prevents or allows the current to flow through it
Electromagnet loses its magnetic property when
When two or more cells are joined together it forms a
MCB in electric circuit stand for
Electromagnet is used in
__________ is used for making the filaments of the bulb.
Coils of heating devices are made up of
Fuse wire is made up of alloys of
Bouncing back of light in same medium is called
A common magnifying glass is an example of
Shaving mirror are usually
Virtual image is always
If an object is placed at a distance of 0.5m in front of a plane mirror, the distance between the object and the image formed by the mirror will be
A rainbow can be seen in the sky
You are provided with a convex mirror, a concave mirror, a convex lens and a concave lens. You can get an inverted image from:
X is observing his image is Plane mirror. The distance between the image and plane mirror is 5 m. If X moves away from the plane mirror by 2 m, Then the distance between X and his image
The splitting of white light into seven colors on passing through a glass prism is called
What is true about Plane mirror?
