synthetic
Cotton and wool are natural; nylon is synthetic.
The difference between natural and synthetic things are that synthetic things are not real. The definition for synthetic is: artificial; not genuine. Natural things are things that can be found in nature and is real.
natural fabric a sobs more water the synthetic fabric. natural fabric is natural plants. synthetic fabric is man made.
natural
Some isotopes of cesium are radioactive and synthetic, as indicated in recent news reports about the Japanese nuclear reactor damaged by the recent severe earthquake/tsunami. (The radioactive cesium reported was formed by atomic fission of uranium and/or plutonium in the reactor.) However, most cesium is neither radioactive nor synthetic!
it is natural
The standard atomic weight for cesium is 133. There are 3 other radioactive cesium isotopes that have atomic weights of 134, 135, and 137. Cesium 133 is the only one that is found in nature. The other isotopes are synthetic.
It is synthetic, but what we use to make concrete is natural AND synthetic.
is bromine natural or synthetic?
Polyester is synthetic.
it is synthetic
synthetic
Cotton and wool are natural; nylon is synthetic.
synthetic
Semi-synthetic
they are synthetic.