Which of the following is the best example of erosion?
a. sediment piling up at the mouth of a river
b. plant roots growing through concrete and splitting it
c. waves carrying sand away from a beach
d. a large rock splitting into pieces because of ice

Write a hypothesis that answers the lesson question, “while observing a chemical reaction, how can you tell which reactant is limiting? ” hypothesis: if a substance is the limiting reactant, then . . because . .

According to periodic trend, which of the following most likely has the highest ionization energy? kr be ni sc

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?