PPSC MCQs

Solar radiation drives weather, climate, and photosynthesis.
Other energy sources are much smaller for the surface system.

Wind turbines convert the kinetic energy of moving air into electricity.
It is a renewable energy source.

Severe vitamin C deficiency causes scurvy.
Symptoms include weak gums, bruising, and poor wound healing.

Carbon dioxide is a major greenhouse gas released by fossil-fuel use.
It traps heat in Earth's climate system.

Vitamin D deficiency can impair bone mineralization in children.
The resulting condition is called rickets.

Recycling processes used materials into new products.
It can reduce waste and demand for raw resources.

Iron is a key component of hemoglobin.
Insufficient iron can lead to iron-deficiency anemia.

Erosion removes and transports soil or rock.
Water, wind, ice, and gravity can cause it.

Specialized cells in the pancreas produce insulin.
Insulin helps regulate blood glucose.

Force is measured in newtons in the SI system.
The unit is named after Isaac Newton.

Plants use carbon dioxide and water to make glucose during photosynthesis.
Oxygen is released as a by-product.

The joule is the SI unit of energy and work.
It is named after James Prescott Joule.