Based on the chart below, which of the tests measured physical properties? (sorry I don't know how to attach images but here are the choices- choose one only)

-density, reaction to flame
-density, phase
-reaction to flame and water
-phase, reaction to water

Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by