2 earth science questions. not very sure on the answers. please help?

B

blackroseofsand

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9.
The product of nuclear fusion is ____. (1 point)

* hydrogen
* oxygen
* helium
* nitrogen

11.
Which of the following is true about parallax? (1 point)

* It is used to measure distances to stars.
* The parallax angles of distant stars are too small to measure.
* The nearest stars have the smallest parallax angles.
* both a and b
 
9)if the fuel is hydrogen (like in case of stars) the product will be helium.
H+H=He.
11) both a and b.
parsec(parallax of an arcsecond) is a unit of distance measurement.
imagine two point at infinte distancefrom a reference point A, the angle made by them will be very small with point A.
 
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