Ozone in the Earth's upper atmosphere
A) filters incoming infrared light reaching Earth's surface.
B) filters incoming visible light reaching Earth's surface.
C) filters incoming ultraviolet radiation reaching Earth's surface.
D) acts as a blanket to keep Earth's surface warm.
Answer: C
You might also like to view...
What do we mean by the star-gas-star cycle?
A) It is the continuous recycling of gas in the galactic disk between stars and the interstellar medium. B) It is the idea that stars in close binary systems can exchange gas with one another. C) It is the set of nuclear reactions by which heavy elements are produced in the cores of massive stars. D) It describes the orbits of the stars and interstellar medium around the center of the galaxy.
Which example best illustrates kinetic energy?
A) A light bulb that is turned on B) A car that is parked on top of a hill C) A comet that is flying through space D) A battery that is connected to a circuit
A concave mirror has a focal length of 20 cm. What is the magnification if the object and image distances are 10 cm and ?20 cm, respectively?
A. 1 B. 2 C. 1/2 D. 1/4 E. ?1/2
Fill in the blank: Elements heavier than hydrogen and helium constitute about ________ of the mass of the interstellar medium
A) 2% B) 70% C) 98% D) 0.002%