HELP PLEASE!!Think about the activities you have carried out over the last three days. Describe two activities that involved physical changes and two activities that involved chemical changes. Choose everyday activities. Do not use any activities you did in school as part of a science lab. How do you know which type of change was involved in each case?

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature

Which change to the system wood cause the freely-moving piston to lower?