How do scientists improve their understanding of the natural world?

Which of the following statements about imprisonment rates in the united states is true? the united states imprisons people at a higher rate than russia, mexico, or canada. the united states imprisons people at a lower rate than russia or south africa, but higher than israel. the united states imprisons people at a lower rate than russia, mexico, or canada. russia, south africa, and mexico each imprison more people than the united states.

When a explodes, radioactive material is dispersed. understanding terrorism: select the best answer from the choices provided. a. germ bomb b. dirty bomb c. chemical explosive d. commercial airplane

Which of the following is the largest organ in the human body? a. liver c. rectum b. pancreas d. gall bladder