It's for my Science hw....
Cement is not poisonous (since it is made from burnt stone) but I have never heard of anyone tempted to eat it. It is definitely not flammable (and is used for fireproofing over steel beams). If there is a great cloud of cement dust in the air in an area that has a source of ignition that dust could explode (not very common and only applies to the dust.) It is mildly corrosive when wet before it cures (only a problem during first few days after pouring it).
As someone who manages hazardous waste shipments. It is not considered flammable, or explosive. It I considered poisonous Because it contains silica
