A lava lamp (or Astro lamp) is a decorative novelty item, invented in 1963 by British accountant Edward Craven Walker, the founder of the British lighting company Mathmos. The lamp consists of a bolus of a special coloured wax mixture inside a glass vessel, the remainder of which contains clear or translucent liquid, the vessel…
Preface Science is always evolving and progressing very rapidly, in accordance with the times and the development of human thinking. The Indonesian nation as one of the developing countries will not be able to advance as long as it has not improved the quality of our nation’s human resources. The quality of life of the…
Preface Marriage is a matter of bonding marriage that is done in accordance with the provisions of law and religious teachings. In a marriage relationship, the child is the thing most couples look forward to. Pregnancy is a process experienced by almost all women. If the egg met with sperm it will occur fertilization that…
Preface Car exhaust contribute a lot to air pollution. And also contribute to global warming by releasing carbon dioxide and water vapor. Global warming is not from exhaust heat (some contribute) but from the fact that carbon dioxide and water absorb heat from the sun and from heat radiating from the ground. In this experiment…
Preface Detergent is a compound that is close to the life of the community. Detergent is often used by the community for various activities, including washing household furniture, washing dishes, and for various industrial activities. The existence of detergent that is very close to the life of society is inseparable from the large share of…
Purpose To detect and obtain fingerprint patterns from our fingers Application Forensic and criminal investigations Basic theory Fingerprints are a unique identity that differs from one person to another. This is a pattern, or trace of the friction region, or lifting the epidermis on the palm of the hand of the finger. The print can…
This teapot is not just any ordinary teapot, created by Okti Nurhidayah, a student from SMA Negeri 1 Sampang, Cilacap Regency, Central Java, Indonesia, can change the contaminated water to be consumed, even salty sea water into fresh water that can be drunk. Teko is a container of drinking water made of clay, this household…
Preface Elephant toothpaste is a term for a very large foam, resembling an elephant’s trunk, or because so many foams are produced so that pas made elephant toothpaste so that his elephant can brush his teeth. Elephant toothpaste experiments show that the hydrogen peroxide decomposition/decomposition reaction can be accelerated with a yeast catalyst. Hydrogen peroxide…
Preface Electricity can be made when certain chemicals react together. We usually use chemicals to make electricity for example on a flashlight, a clock battery or sometimes a car battery. There are cars that run on electricity! Devices that store electricity are called batteries. Instead electricity can also be used to produce chemical changes or…
Preface A snowball is a ball-shaped ball made of snow. The simplest snow ball is made by snowmaking by hand and condensing it into a fist-sized ball. Snowballs are widely used in various games such as snowballing, and snowman making. Compacting it with high pressure will make the snow ball as hard as ice so…