Which question can be answered using the scientific method

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas