Mogea Science questions with correct answers

Which of the following structural characteristics is most important if a substance is to be good electrical conductor? CORRECT ANSWER Electrons that can move from atom to atom To be a good conductor, a material must have free electrons that can move between ___________ and glow as a current. CORRECT ANSWER Atoms The periodic table arranges all of the known elements into a table. The placement of elements in specific rows or columns of the table reveals a great deal about the characteristics of each element. Therefore, it is possible to determine relationships between the elements by comparing their positions in the periodic table. The use of characteristics of the elements to determine the arrangement of the periodic table is an example of which of the following cross cutting scientific concepts ? CORRECT ANSWER Patterns Which statement best explains why large changes in air temperature can result in strong winds? CORRECT ANSWER Changes in density cause air masses to rise or fall A scientist is investigating why plant roots grow down. As part of the investigation, this scientist observe root growth from seeds planted sideways in the ground. This example is it application of which of the following crosscutting concepts in science? CORRECT ANSWER Cause-and-effect Which of the following reasons best explains why isn't possible for an insect to grow to the size of an elephant? CORRECT ANSWER It's exoskeleton would be too heavy for its muscles to lift or move.