In which row is the air pollutant not correctly matched with its source? air pollutant
Source
A
carbon monoxide
B
incomplete combustion of fuels
burning petrol in cars
decomposing vegetation
burning coal and other fossil fuels
lead compounds
nitrogen oxides
sulfur dioxide
С
D

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

Which characteristics can be used to differentiate star systems? check all that apply.