*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? Read this paragraph and choose the correct option from the provided answers: Giant elliptical galaxies contain over a trillion stars. Elliptical galaxies are red to yellow in color because they contain mostly old stars. Most contain very little gas and dust because the material has already formed into 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? Read this paragraph and choose the correct option from the provided answers: Plant-like protists are essential to the ecosystem. They are the base of the marine food chain, and they produce oxygen through photosynthesis for animals to breathe. They are classified into a number of basic groups ( Table below ). Choices: - respiration - metamorphosis - glycolysis - photosynthesis A:
**Answer**
photosynthesis

*Question*
Q: In physics, what do you call devices that make work easier? Read this paragraph and choose the correct option from the provided answers: In this chapter, you saw how pressure and buoyancy of fluids can be used to make work easier from raising a car on a lift to floating a ship on the ocean. Devices that make work easier are called machines in physics. Choices: - circuits - levers - tools - machines A:
**Answer**
machines

*Question*
Q: Where does the earth gets its energy from? Read this paragraph and choose the correct option from the provided answers: Earth gets its energy from the Sun. The Sun gives off photons of energy that travel in waves. All the wavelengths of the Sun's energy make up the electromagnetic (EM) spectrum. Choices: - decomposers - precipitation - heat - sun A:
**Answer**
sun