Which tool is used to detect yellow light rays emitted by stars from outer space?
x-ray optical telescope
gamma telescope
optical telescope
infrared telescope

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

In which situation can a mixture always be called a solution

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.