Example 1: FOREST FIRES
September 24, 2015 - Forest Fire in Indonesia continue to cause smog and haze (Atmosphere) across the region, with air pollutants reaching hazardous levels overnight in Singapore.
The poor air quality shift in wind direction transporting smoke and haze from land and forest (Biosphere) fires in South Sumatra, Indonesia. Their District continues to lead in the number of active fire alerts, with 423 hotspots (Lithosphere) in the last week.
The particulate matter in the air falls out, smothering plants, enriching the soil and thereby moving towards seas, rivers (Hydrosphere) and other water forms that can endangered human's health.
Example 2: DROUGHT
April 8, 2016- Swathes of corn stand withered on the parched rolling hills near the farming town in the Southern Philippines, while shallow cracks scar were once fertile rice paddies. (Biosphere)
El Nino is wreaking havoc in agriculture-rich Cotabato province.
That the villagers are in difficult situation of nothing else to eat. After a lot of incident happened, one of the villagers complained back pain and headache after the rough sleeping of several days.
Unfortunately, he died due to heat stroke of the recent changes in temperature due to Global Warming. (Atmosphere) The animals have nothing to feed the fields are dry making the soil (Geosphere / Lithosphere) less fertile for plants.
The farmers experienced scarce of water (Hydrosphere), crop failures and starving, land drying livestock as well as shortage of potable water.
Answer:
3
Explanation:
The mass has 4 sig digits.
The volume has 3 sig digits
The density is = 11.50/9.03 = 1.2735
To 3 sig digits (determined by 9.03) the answer would be 1.27 gram/mL
Most atoms do not. For those atoms that do not have a full valence shell (which usually would contain eight electrons, except for hydrogen and helium, where it would contain two), something has to change. So nature's tendency toward a full valence shell will lead to one of two things: The gain or loss of electrons.
Answer :
Lewis-dot structure : It shows the bonding between the atoms of a molecule and the unpaired electrons present in the molecule.
The given molecule is,
Beryllium has '2' valence electrons and fluorine has '7' valence electrons. Beryllium is the central atom and fluorine is the terminal atom.
Total number valence electrons in = 2 + 2(7) = 16
According to the Lewis-dot structure, there are '4' number of bonding electrons and 12 number of non-bonding electrons (lone-pair).
The Lewis-dot structure is shown below.
Answer:
Oxygen exists as a diatomic molecule in nature when it is not combined with any other element. It forms O2 molecule because it is stable when it is uncombined. ... By achieving octet configuration, the diatomic elements become more stable compared to the single atom. Therefore, oxygen and hydrogen are diatomic.
Explanation:
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