Everyday Science MCQs

Roots physically hold soil together.
Vegetation also reduces the impact of rain and surface runoff.

A balanced diet supplies energy, building materials, vitamins, minerals, fiber, and water.
Needs vary with age and activity.

Cholera is caused by Vibrio cholerae.
Safe water, sanitation, and rapid rehydration are essential.

Renewable resources are naturally replaced relatively quickly.
Examples include sunlight, wind, and flowing water.

Carbohydrates are broken down mainly into glucose.
Cells use glucose to produce ATP.

Dengue is transmitted mainly by Aedes aegypti and related mosquitoes.
These mosquitoes often bite during daytime.

Photovoltaic materials release charge carriers when illuminated.
The device generates direct electric current.

Proteins supply amino acids for building and repairing tissues.
They also form enzymes, antibodies, and many hormones.

Cool running water removes heat and limits tissue damage.
Direct ice can worsen injury by causing cold damage.

Hydropower turbines are driven by flowing or falling water.
Generators convert the turbine's motion into electricity.

Oxygen concentration is higher in alveolar air than in incoming blood.
It diffuses across the thin respiratory surface.

Skin covers the entire external body surface.
It protects tissues and helps regulate temperature.