Category: smurfs: this smurf is the only smurf who wears glasses.?

Questions

[science and technology] how many degrees are there in a circle?

[science and technology] what is the name given to the green pigment in plants?

[science and technology] what is the instrument used to measure atmospheric pressure?

[science and technology] what colour spots has the common ladybird?

[General knowledge] what gas mark is equivalent to 350 degrees fahrenheit?