Explanation

• Over-eating can lead to obesity.
• While consuming spicy food can irritate the stomach lining.
• It potentially causing ulcers in susceptible individuals.

Explanation

• A black hole is a region of space where matter has collapsed in on itself.
• It creating an incredibly dense and gravitational field so strong that not even light can escape.

Explanation

• Blue stars are hotter than red and orange stars.
• The temperature of stars increases from red to orange to yellow to white to blue, with blue stars being the hottest.

Explanation

• When a sound wave travels from one place to another, it transports energy from the source of the sound to the surrounding environment.
• Sound waves are a form of mechanical energy that is transferred through the vibration of particles in a medium, such as air or water.

Explanation

• Dispersion of light refers to the splitting of white light into its component colors, which are also known as the visible spectrum.
• This occurs when light passes through a medium with a refractive index that varies with wavelength, such as a prism.

Explanation

Reflecting prisms work on the principle of total internal reflection, where light is completely reflected back into the prism material rather than passing through the interface.

Explanation

• Convection is the primary mode of heat transfer in liquids and gases, where heat is transferred through the motion of fluids.
• This motion creates circulation currents that carry heat energy from one location to another.

Explanation

• Burning process is a chemical process.
• But it is not a physical process.

The characteristics of the burning process are:

• It is a chemical process.
• It takes place in all living cells.
• It release energy.
• Various enzymes are required.

Explanation

The large intestine (colon) is responsible for absorbing:

• Water
• Mineral salts (electrolytes)
• Some vitamins (like vitamin K and biotin)

Explanation

• Filtration is a process that removes suspended sand particles and insoluble physical impurities from water.
• By passing it through a filter medium, such as sand, gravel, or a membrane.