(science)

when a scientist conducts an investigation, which of the following is the first thing he or she should do?
a) design the experiment
b) make observations
c) identify the problem
d) form conclusions

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

Which type of fossil does this image depict?

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules