Suppose your teacher has asked you to explain to a fifth grade class ( I'm 7th by the way) why cells are so small. What would you say? What drawings or diagrams might you use to make the idea easier to understand? Please make it detailed and long and NOT plagiarized. THXS. Please answer quickly. I need it Im timed.

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

8. what happens to matter during a chemical reaction