Explanation- Odontology is a branch of science that is related to teeth, their structure, development, and diseases.

The inventor of the first practical telephone is Alexander Graham Bell. He received the first US patent for the telephone in the year 1876.

Central Food Technological Research Institute is in Mysore, Karnataka.

In holography technique, 3D images are created with the help of laser beams.

Matthew Maury is the father of modern oceanography. It is noteworthy that Professor Eugene LaFond is known as the 'father of modern oceanography in India'.

The outer surface of vehicle tires is made corrugated so that friction between the road surface and the wheels increases. The friction generated between the road surface and the vehicle's wheels acts as kinetic friction, which exerts an external force and controls the movement of the object.

Restriction enzymes were discovered by Werner Arber, Hamilton O. Smith, and Daniel Nathans. It is a protein produced by bacteria that cuts DNA at specific sites along the molecule.

Explanation- In Astronomy, a White Dwarf is called a small star made of 'electron degenerate matter'.

The principle behind seeing colors by shining white light on soap bubbles is interference. When rays of white light fall on soap bubbles, rays are reflected from both their outer and inner surfaces and return towards the observer's eyes. Due to minute differences in the phases of the wave groups of light reaching the eye from both surfaces, interference occurs, as a result of which colors are visible.

Various species of green algae, which have various pigments including red (Chlamydomonas nivalis - a unicellular red colored synthesizer), give red stains to the snow while going through the photosynthesis process. This is termed as the red snow phenomenon.

Liquefaction: This refers to all processes that start from solid or liquid and form gas. When an area of air cools down and turns steam into liquid.

Rearing of silkworms for silk production is called Sericulture.

Explanation- Aerometer is used to measure the weight and density of air and gases. Altimeter is used to measure the height of aircraft. The instrument used to measure electric current in Amperes is the Ammeter. Anemometer is used to measure the force, direction, and speed of wind.

Humidity (moisture content) in the air is measured by a Hygrometer.

Units that are completely independent are called base units, i.e., they are not derived with the help of any other base quantity or other quantity; these are the alphabet of base units. Base units of base quantities: The base unit of length or distance is the meter. The base unit of mass is the kilogram. The base unit of time is the second. The base unit of temperature is the Kelvin.

When boiling water falls on our body, the skin at that spot takes heat from the water. Since skin is a poor conductor of heat, the absorbed heat does not go to the whole body but remains at that spot. This raises the temperature of that spot higher than other places, and burning occurs. When steam comes in contact with our body's skin, it first turns into water at $100^{\circ}C$. In this process, 536 calories of heat is released per 1 gram of steam, which is called latent heat. This heat is not present in boiling water. It is due to this additional (latent) heat of steam that causes much more severe burns. Therefore, steam causes more burns than boiling water.

Explanation- See the explanation of the above question.

The density of an air-filled balloon, sodium, and potassium is less than water, so they float. The density of a gold ring and steel spoon is greater than water, so they sink.

Food energy is measured in kilocalories.

The velocity of sound is higher in solids than in gases. The velocity of sound is higher in steel, so the sound will reach through the rail track first and then through the air, due to which the boy standing at some distance hears the sound of the labourer hammering the track twice.