The element lead has been known since ancient times and is sometimes found free in nature, but most lead on Earth is obtained by burning the ore galena in hot air. Today, lead is also obtained through the mining of ores ... More » Science Environmental Science

Lead is a metal element that is solid at room temperature. It has a boiling point of 3,180 degrees Fahrenheit, a melting point of 621.34 degrees F and a density of 11.342 grams per cubic centimeter. The element has an at... More »

According to Jefferson Lab and Chemistry Explained, it is not possible to tell exactly who discovered lead, however, it has been in use since before Roman times. According to Chemistry Explained, lead sulfide, PbS, is a ... More »

Pesticides, lead, contaminated water, mercury, carbon monoxide, tobacco smoke and asbestos are types of environmental hazards that pose health risks. Many people are exposed to environmental hazards at industrial work si... More »

The adaptability and interconnected nature of the organisms living in ecosystems helps to maintain the habitats in the natural world. For example, if one important species begins to disappear from a habitat, other specie... More »

Wildlife plays a significant role in maintaining the ecological equilibrium of nature. The presence of wildlife affects the character of its habitat by continually supporting the evolutionary adaptations of everything in... More »

Some ecology projects for kids are learning what nature recycles naturally and looking how pollution in water affects the world. To look at how pollution in water affects the food line, the child can place celery in wate... More » Science Environmental Science