Which is correct about convection currents? (1 point) A. It results to formation of valleys and hills.
B .It happen in all layers of the Earth.
C .It causes earthquakes.
D .It is made possible by heat and pressure.

An exothermic reaction is conducted in an insulated calorimeter filled with water. the calorimeter is then sealed so that there is no heat exchanged between the contents of the container and the surrounding air. which of the following statements is true about the reaction?

Asa choose the correct set of reaction coefficients to properly balance the following chemical equation according to the law of conservation of mass: __s8 + __o2 ==> __so2 1, 1, 8 1, 8, 1 1, 8, 8 8, 1, 1

All cells are made of four types of acids, lipids, proteins, and carbohydrates.