*Question*
Q: Which type of galaxies contain very little gas and dust, are red to yellow in color, contain over a trillion stars and have mostly old stars? Choices: - blue elliptical galaxies - giant orbital galaxies - giant gaseous galaxies - giant elliptical galaxies A:
**Answer**
giant elliptical galaxies

*Question*
Q: Plant-like protists produce oxygen through which process? Choices: - respiration - metamorphosis - glycolysis - photosynthesis A:
**Answer**
photosynthesis

*Question*
Q: In physics, what do you call devices that make work easier? Choices: - circuits - levers - tools - machines A:
**Answer**
machines

*Question*
Q: Where does the earth gets its energy from? Choices: - decomposers - precipitation - heat - sun A:
**Answer**
sun