Karakteristik Benda

	Video 4.1. : Bahan plastik
	Video 4.2. :  Intan dan grafit
	Video 4.3 : Alloy Baja Sumber : www.youtube.com/watch?v=gLNltMtBjc8, www.youtube.com/eatch?v=SkpAy9_opDk
	Video 4.4 : Tulang Sumber: https://www.youtube.com/watch?v=SWv-aY4RH3c, https://www.youtube.com/watch?v=rZy_GMWV87g, https://www.youtube.com/watch?v=inqWoakkiTc
	Video 4.5. : Komponen penyusun Gigi Sumber: wwwmakemegenius.com