*Question*
Q: How is communication initiated and maintained with spacecraft? Choices: - sonar - telegraph - wi-fi - radio waves A:
**Answer**
radio waves

*Question*
Q: How many lobes is each hemisphere of the cerebrum divided into? Choices: - 9 - 2 - 5 - 4 A:
**Answer**
4

*Question*
Q: What do you call a structure composed of two or more types of tissues that work together to do a specific task? Choices: - cell - marrow - system - organ A:
**Answer**
organ

*Question*
Q: What kind of movement do planets in the solar system make around the sun? Choices: - optical orbits - round orbits - spinning orbits - elliptical orbits A:
**Answer**
elliptical orbits