Search results for “Natural radioactive substances”

How to find radioactive substances in humans

Radioactive substances are found everywhere in our environment. They can enter the human body through inhalation or food. In the video, Dr. Udo Gerstmann explains how to measure radioactivity in the body with a whole-body counter and when it is used. Original: "Federal Office for Radiation Protecti

How to find radioactive substances in the air

There are various methods for measuring radioactivity in the air. With the help of trace analysis, even very low concentrations of radioactivity in the air can be detected. In the video, Jacqueline Bieringer explains how to detect radioactive substances in the air. Original: "Federal Office for Rad

What is radioactivity

You don't see it, and you don't feel it: radiation. Nevertheless, humans are always exposed to radiation. Shielding makes sense. Natural radioactive substances in soils and rocks emit radiation. And it comes not only from the earth, but also from heaven. The higher, the stronger the cosmic rays. I

Substance Abuse and Its Consequences

Learn about what substance abuse is, and the consequences that result from it. Sources: https://www.drugabuse.gov/related-topics/trends-statistics https://www.summitbehavioralhealth.com/resources/articles/consequences-of-addiction/ This video was created by one of our volunteer authors to support

08 Classification of Substances

In chemistry, substances are divided into different groups. This screencast gives a short and theoretical overview of this classification. An initial relationship between elements and compounds is essential. Original: "Wolfgang Dukorn" Original: German. All translations in this video have been don

The natural water cycle

The natural water cycle is powered from solar energy. Its thermal radiation evaporates water from oceans, lakes and rivers into water vapour. As precipitation, the water enters lakes, rivers and groundwater and eventually flows into the sea. Author: 3sat/nano, mirror TV, Christine Voges, R. Engelk