2. Consider a satellite-based instrument aimed at detecting the presence of methane from space.
a. How might this instrument:
i. ‘Exploit’ the Question 1 physical property to detect greenhouse-active gases in general? [1 mark]
ii. Be ‘tuned’ to detect methane? [2 marks]
b. Why would a ‘water-vapour filter’ be a necessary feature of this instrument? [1
mark]
c. Why wouldn’t a ‘molecular Oxygen and Ozone filter’ be needed? [1 mark]

Amath expression is a collection of one or more terms, which are separated by the signs ( + , - , x , / ).example :   8+b8+b  or  a−3a−3in algebra, an equation is a mathematical statement with two expressions where, each expression is separated by an equal (=) sign. variables can be present on both the sides of the equality (=) sign and we use letters to denote such variables.example 1:   x=4+2x=4+2  , [here, we can observe that the variable is present only on one side of the equation].example 2:   2x+3=x+42x+3=x+4  , [here, we can observe that the variables are present on both side of the equation].

D. a mountain abd are made by volcanos and tectonic plates

Answerrecharge zone;