When did life first appear in earths oceans?

Describe how chemical weathering and the formation of biochemical sediment remove carbon from the atmosphere and store it in the geosphere?

What are the shorthand and long hand electron configurations for chlorine.

What do scientists use to measure the rate of movement of oceanic plates?

Use the periodic table to identify the number of core electrons and the number of valence electrons in each case below. Potassium (K) : 1s22s22p63s23p64s1

What happens to the biomass as energy decreases up the food pyramid?

Question 6 if a gas pressure gauge reads 32.0 psi, what is the pressure in inches of mercury? 165 in. hg 15.7 in. hg 65.1 in. hg 32.0 in. hg 6.19 in. hg

A line in the Brackett series of hydrogen has a wavelength of 1945 nm. From what state did the electron originate?

Convert 4.5 hours to seconds

Gasoline catches on fire is it flammability?

Enzymes are proteins that speed up chemical reactions in the body how do they work A. they increase the surface area of reactants B. they increase the concentration of reactants C. they decrease the concentration of products D. They act as reactants