Go to the NOAA website (https://www. esrl. noaa. gov/gmd/ccgg/trends/mlo. html) and look at the most recent carbon dioxide level measured. The highest level of carbon dioxide reached in the last 800,000 years was about 300 ppm. How much higher is the current carbon dioxide level than the previous peak value of 300 ppm?

Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

In science and physics what is the standard unit of measure for speed?