____ gas (O2) makes up 21 percent of the atmosphere
A) Oxygen
B) Nitrogen
C) ?Ozone
D) Carbon dioxide
A
Trades & Technology
You might also like to view...
List the significant contributions of Genichi Taguchi.
What will be an ideal response?
Trades & Technology
Nine percent of small?engine injuries are caused by the operator
Indicate whether the statement is true or false.
Trades & Technology
____________________ is the pushing or pulling action of one object on another
Fill in the blank(s) with the appropriate word(s).
Trades & Technology
How is the upper limit of the outdoor room defined?
a. outdoor floor c. outdoor ceiling b. outdoor wall d. roofline of the house
Trades & Technology