The Archaea Sulfolobus live in volcanic hot springs where they obtain energy from chemical reactions and carbon from their environment. Given this, they can be classified metabolically as
A) photoheterotrophs
B) chemoautotrophs
C) photoautotrophs
D) chemoheterotrophs
B
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What happens when a star like the sun exhausts its core hydrogen supply?
A) Its core contracts, but its outer layers expand and the star becomes bigger and brighter. B) It contracts, becoming hotter and brighter. C) It contracts, becoming smaller and dimmer. D) Its core contracts, but its outer layers expand and the star becomes bigger but cooler and therefore remains at the same brightness. E) It expands, becoming bigger but dimmer.
Is it possible to add heat energy to a substance and not increase its temperature? Give an example
Which of the following is not a unit of power?
A. Watt B. KiloWatt C. Joule/second D. Horsepower E. KiloWatt-hour
You are walking holding on to the axle of a spinning bicycle wheel with one hand on either side of the wheel. The top part of the wheel is moving away from you and the bottom is moving toward you and the axle is horizontal. As you start to turn left, you feel the right side of the axle
A) push on your right hand toward the left. B) push on your right hand toward you. C) pull on your right hand away from you. D) push on your right hand vertically up. E) push on your right hand vertically down.