What does the anhydrous mgso4 do? how does it interact with the extract? what does it become?

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

Is 9 correct? and can someone me with 10? it’s due tomorrow, you

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.