Read the passage below and choose the right answer to the following question (choices are a pinhead or the sun ):  An object with greater mass or greater velocity has more kinetic energy.   Which object likely contains more energy a pinhead or the sun?
the sun

Read the passage below and choose the right answer to the following question (choices are warmer or colder ):  Warmer molecules vibrate faster than cooler ones.   As molecules start moving slower they get warmer or colder?
colder

Read the passage below and choose the right answer to the following question (choices are United States or China ):  Because richer nations use more fossil fuels, they also cause more air pollution and global warming than poorer nations do.   Chris is studying two countries. He finds that China has half as many factories putting out fossil fuels into the air than the United States. Based on this information, the factories in United States or China are causing more air pollution?
United States

Read the passage below and choose the right answer to the following question (choices are greater or lesser ):  When the heart expels more blood with each stroke, the heart has to beat less often in order to maintain the same volume of blood flow.   Jan had a very low heart rate, but was perfectly healthy, indicating that her heart expels blood in amounts that are greater or lesser?
