Which of the following statements about ozone (in Earth's stratosphere) is not true?
A) The presence of ozone was crucial to the origin of life.
B) If the ozone layer is depleted, we can expect the rate of mutations in land-based life-forms to increase significantly.
C) Ozone absorbs ultraviolet light from the Sun.
D) The human-made chemicals known as CFCs can cause a loss of ozone in the atmosphere.
A) The presence of ozone was crucial to the origin of life.
You might also like to view...
Suppose that we place an aluminum cylinder, a wooden block, and a Styrofoam cup on a table and leave them there for several hours. We then come back into the room and feel each object. (a) Which (if any) feels coolest?
A. The aluminum cylinder B. The wooden block C. The Styrofoam cup D. All are the same.
When no forces act on moving objects their paths are normally
A) straight lines. B) circles. C) ellipses. D) all of the above
A heat engine absorbs 64 kcal of heat each cycle and exhausts 42 kcal
(a) Calculate the efficiency each cycle. (b) Calculate the work done each cycle.
Intensity: Light from a laser forms a 1.31-mm diameter spot on a wall. If the light intensity in the spot is 1.58 × 104 W/m2, what is the power output of the laser? Assume that all the light emitted by the laser hits the spot.
A. 21.3 mW B. 13.2 mW C. 17.9 mW D. 24.7 mW