Which instrument, along with a telescope, allows study of the wavelengths of visible light coming from a star? a nuclear reactor

a spectrograph

a shortwave radio set

a solar flare

Awatershed is a piece of land that drains water into a particular stream, lake, or river. which of the following factors often negatively impacts the water quality in a watershed? a.) wetlands b.) pollution c.) irrigation d.)rainfall

Which of the following best describes brazil's economy from 1650-1880? a. it gradually shifted to manufacturing as the industrial revolution progressed. b. it was based on mining. c. it was based on plantation agriculture, where slaves served as a labor force. d. it was based on small, family-owned farms.

Wegeners theory of continental drift states that the continents have changed throughout history while the theory of plate tectonics