In chemistry class, I learned about acidic oxides.

Bioweapons are a major threat to humanity.

In this experiment, we will use various inorganic compounds.

In this experiment, we will observe the reaction of organic compounds.

Protists are being studied in a branch of biology.

Arthropods are a large group of animals that include insects, spiders, shrimp, and crabs.

Carbohydrates are important as a source of energy.

The ejecta from volcanoes help to elucidate the geological history of the Earth.

We should always remember the power of Kannon in difficult times.

Demography is an important tool for understanding various aspects of society.