List conditions under which combustion can take place.
The conditions under which combustion takes place are as follows: Presence of combustible substance. Presence of supporter of combustion –... View Article
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What are the causes and consequences of deforestation?
Deforestation refers to the decrease in forest areas across the world that are lost for other uses such as agricultural... View Article
Electric current can flow through metals. (True or False)
True Explanation Metals are good conductors of electricity. So, an electric current can easily flow through them.Metals are an excellent... View Article
The contraction of the _____________ pulls the bones during movement.
The contraction of the muscle pulls the bones during movement. Each skeletal muscle consists of hundreds or even thousands of... View Article
An image that cannot be obtained on a screen is called ____________.
An image that cannot be obtained on a screen is called a virtual image. Explanation For example, virtual image is... View Article
The process of water seepage into the ground is called ________.
The process of seeping of water into the ground is called infiltration. Explanation The infiltration capacity is the maximum rate... View Article
List the differences between clayey soil and sandy soil.
Clayey soil Sandy soil Contains finer particles Contains larger particles Particles are tightly packed Particles are loosely packed It is... View Article
What will happen if there are no platelets in the blood?
If there are no platelets, the blood would not clot in case of an injury. Explanation Platelets, also known as... View Article
Similar poles of a magnet repel each other. (True or False)
True Explanation Magnets are objects, which can attract, or pull, on some metals, like iron and steel. All magnets have... View Article
Which gas in the atmosphere is essential for respiration?
Oxygen gas in the atmosphere is essential for respiration. Respiration is defined as a metabolic process wherein, the living cells... View Article
The height of a person is 1.65 m. Express it into cm and mm.
Height of the person = 1.65 m We know that 1 m = 100 cm ∴ 1.65 m = 100... View Article
A notebook has lustre while eraser does not. (True or False)
False. Explanation Notebook and eraser do not have any lustre because they are not metals. Lustre is gentle shining light... View Article
No rainfall for a year or more may lead to _________________ in that region.
No rainfall for a year or more may lead to drought in the region. A drought is a period of... View Article
The process of changing water vapour into water is called _________________.
The process of changing water vapour into water is called condensation. Explanation Condensation is simply the process of change of... View Article
The weaving of yarn makes a piece of fabric. (True or False).
The weaving of yam makes a piece of fabric – True Explanation Fibres are first converted into yarn by the... View Article
State two differences between a convex and a concave lens.
A convex lens or converging lens focuses the light rays to a specific point whereas a concave lens or diverging... View Article
Explain the differences between pure air and polluted air.
Difference between pure air and polluted air Pure air Polluted air Pure air consists of a mixture of gases in... View Article
Artificial magnets were discovered in Greece. (True or False)
False Explanation Natural magnets were discovered in Greece. Magnets always have two poles; the north pole and the South Pole.... View Article
The process of changing of water into its vapour is called _________________.
The process of changing water into its vapour state is called evaporation. The evaporation of water takes place only in... View Article
From which parts of the plant cotton and jute are obtained?
Cotton is obtained from the fruit of the cotton plants. The cottonseed, which is a fruit which on ripening splits... View Article
