10 Questions about Science for kids | For Children

Answer: Water

A compound is usually formed by the combination of two or more elements. Water is formed by the combination of hydrogen and oxygen i.e H2O.

Answer: Oxygen

Inert gases (sometimes called noble gases) are gases whose outermost shell is filled with 8 electrons thus they can't take part in reactions. Oxygen has 2 electrons in its outermost shell hence it is not inert.

Answer: Copper sulphate in water

A mixture is a combination of two or more substances in any proportion. We can mix copper sulphate and water in any proportion; thus it is a mixture.

Answer: Leaf

A leaf is a part of tree. The liver, hand and spleen are human body parts and organs.

Answer: All of these

One can prevent diseases by regular exercise that strengthens our bodies. Eating a balanced diet helps in improving body immunity and provides energy. Regular check ups of our body keep us aware about any disease that may attack us.

Answer: Centripetal force

Centripetal force acts on a body when it is in circular motion. While we are running on a straight road, no centripetal force acts on us but gravitational force acts on us so that we remain on the ground and don't fly off into space. Frictional force helps us to move forward. Muscular force is exerted by our body to run.

Answer: Due to lack of atmosphere

There are no particles in space like we have in the upper layers of our atmosphere which scatter light. The particles reflect the wavelength of light equal to their own size and that's why the sky looks blue because the size of the particles lies between the wavelengths of blue and indigo.

Answer: Specific gravity

Specific gravity is also called relative density. It is the ratio of the density of an object to the density of water. As it is a ratio of two quantities with the same units, it doesn't have any units.

Answer: Gravitational force

Due to its enormous mass, the Earth exerts a gravitational force on the moon that makes it revolve around the Earth. The moon also exerts this force on Earth but the effect is negligible because the moon is much smaller.

Answer: Liver

The human respiratory system consists of the nose, trachea and lungs. The liver is a part of the digestive system. It secretes bile that helps in the digestion of fats.