The correct answer for this question is 'False'
Environmental science is not the study of the earth's natural hazards
What is Environmental science?
Environmental Science is the study of physical, chemical, biological components of earth's natural environment they include air, water etc., 
The Environmental science closely studies the human impact on the earth's environment.
This field of science also helps us to know about how science effects our environment.
And the 3 main aspects of Environmental science are: 
To understand the interaction between humans and environment 
To understand how natural world works
To Find a way to deal with the environmental problems to live sustainably.
To know more about environmental science, click here:
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<span>In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. Balanced chemical equation for this reaction is given below.
Na-sodium , H2o- water, H-hydrogen gas and NaOH- aqueous sodium hydroxide.
Two atoms of Na react with two atoms of water and this reaction will give us H (hydrogen gas) and two atoms of NaOH (aqueous sodium hydroxide).
2Na + 2 H2o = H2 +2NaOH.</span>
        
             
        
        
        
An artery carries blood away from the heart, a vein carries blood to the heart.
 
        
             
        
        
        
It has to be D. the time needed to boil the water decreased
        
                    
             
        
        
        
Answer:
B.) trigonal bipyramidal
Explanation:
A.) is incorrect. In octahedral molecules, the central atom is bonded to six other atoms.
B.) is correct. In trigonal bipyramidal structures, the central atom is bonded to five other atoms.
C.) is incorrect. In tetrahedral molecules, the central atom is bonded to four other atoms.
D.) is incorrect. There is not such thing as a pyramidal molecular shape. This term is most likely referring to the shape, trigonal pyramidal. However, this is still incorrect. In trigonal pyramidal molecules, the central atom is bonded to three other atoms and a lone pair of electrons.