Explanation

In the temperate zone, the sun’s rays fall at a slant angle, not directly overhead.

This results in milder temperatures compared to the tropical zone.

Explanation

The area of a circular sector is given by the formula:

Area = (1/2) × r² × θ

where r is the radius and θ is the angle in radians.

This formula applies only when θ is in radians.

Explanation

Respiration and combustion are exothermic reactions because they release energy in the form of heat.

Photosynthesis, on the other hand, is an endothermic reaction as it absorbs energy to produce glucose.

Explanation

Rock candy forms when a supersaturated sugar solution cools and sugar crystals gradually crystallize out.

It shows crystallization from a supersaturated solution, not just a simple saturated one.

Explanation

Water is used for various recreational activities like swimming, rafting, and boating.

These activities promote physical health.

These are popular in tourism and leisure industries.

Explanation

Natural gas is a key feedstock for fertilizer production.

Approximately 29% of the country's natural gas consumption is utilized in the manufacture of fertilizers.

Explanation

Vaccination stimulates the immune system to produce antibodies, building resistance against specific viruses.

It prepares the body to fight off future infections by recognizing and attacking the pathogen.

Explanation

Temperature increases or decreases the kinetic energy of particles, leading to melting, boiling, or freezing.

Pressure affects the arrangement of particles, especially in gases, influencing condensation or compression.

Explanation

In a compound microscope, the final image is typically virtual and inverted.

The objective lens forms a real, inverted image, which is then magnified by the eyepiece, resulting in a virtual and inverted image seen by the observer.

Explanation

When an object is placed between F (focus) and 2F in a convex lens, the image is formed beyond 2F.

The image is real, inverted, and magnified because light rays converge beyond twice the focal length.