MOSFET questions

http://www.jaycar.com.au/products_uploaded/zt-2468.pdf

That's the MOSFET i'm looking at - 0.005 ohms.

The math I've applied is 10A x 0.005 = 0.05, this times by the amps is 0.5 W, so the MOSFET will dissipate 0.5W when switching 10A?