| The law of conservation of mass states that mass is neither created nor destroyed. In a closed system, mass of reactants is equal to mass of products. |
| They were created in 1972 and are each divided into several metropolitan districts or boroughs. |
| The unexpected results of the test have created a quandary for researchers. |
| In the end, the debate created a degree of rancor among the committee members. |
| It seemed a prime suspect as an astrobleme created by recoil uplift following a hypervelocity asteroidal impact. |
| He used gravity and the tension created by cooling glass to manipulate the piece into a dolphinlike shape. |
