What do we call the visible streak of light created by space debris entering earth's atmosphere?
a. meteor
b. asteroid
c. meteorite
d. meteoroid

People keep spending additional units of a particular resource on a want until their marginal benefit is  decreasing withgreater thanless thannot affected by  their marginal cost.

Good scientists always report their observations and results truthfully. this is especially important when a scientist's results go against previous ideas or predictions. coming up with inventive ways to solve problems or produce new things

Which statement best describes how chemical equations demonstrate conservation of mass?