Everyday Science MCQs

Artificial satellites orbit Earth or other bodies.
They support communication, navigation, weather, and research.

A receiver compares arrival times from several satellites.
It calculates distance and solves for location and clock error.

Fat provides about nine kilocalories per gram.
Carbohydrates and proteins provide about four each.

Direct pressure helps compress damaged vessels and promote clotting.
Emergency help is needed if bleeding is severe.

Earth's internal heat warms rocks and underground water.
It can provide heating or generate electricity.

Vitamin A supports retinal pigments and epithelial health.
Deficiency can cause night blindness.

Oxygen accounts for about 21% of dry air.
It supports respiration and combustion.

Tectonic stress builds in Earth's crust.
When rocks slip, seismic waves spread from the rupture.

Vitamin D promotes calcium and phosphate absorption.
It is important for healthy bones and teeth.

Stratospheric ozone absorbs much ultraviolet radiation.
This helps protect living organisms from DNA damage.

A seismograph detects and records vibrations of the ground.
The resulting record is called a seismogram.

Vitamin K is required to make several clotting factors.
Deficiency can increase bleeding risk.