This is because elements are pure substances with only one atom. When two or more elements are combined, you get compound elements; which allows for more substances to be created.
Answer:
All the water that is on earth today is the water that has been on the planet. Freshwater is a million years old. The same water is flowing in a continuous loop in the form of falling as rain and snow from the clouds to the earth’s surface. Running in rivers and ponds. This is due to the water cycle. The cycle where the water evaporates in the atmosphere and is from the atmosphere and then cloud loses the water as rain or snow.
D replace toxic chemicals
If there is no oxygen...many cells die....but some can perform cellular respiration without oxygen too.....they are anaerobic. they usually use organic substance to survive !!!
as acidophilic bacteria survive without oxygen in acids ...so !!!
The northern states, or the Union states.
