When there is a net absorption of energy in a chemical reaction, it is called a(n) ______________ reaction
a. exothermic
b. activation
c. endothermic
d. combustion
c
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What would happen to Earth's temperature if Earth were more reflective?
a. It would go up. b. It would go down. c. It wouldn’t change.
Notice that Earth's axis is shown with an arrowhead in this diagram. What does the arrow point to?
A) the Sun B) the ecliptic plane C) the center of the Milky Way Galaxy D) Polaris, the North Star E) the Northern lights
__________ radiation causes your skin to tan
Fill in the blank(s) with correct word
A 360-g metal container, insulated on the outside, holds 180.0 g of water in thermal equilibrium at 22.0°C. A 24.0-g ice cube, at the melting point, is dropped into the water,
and when thermal equilibrium is reached the temperature is 15.0°C. Assume there is no thermal energy exchange with the surroundings. For water, the specific heat is 4190 J/kg ? K and the heat of fusion is 3.34 × 105 J/kg. What is the specific heat of the metal of the container? A) 1700 J/kg ? K B) 970 J/kg ? K C) 2300 J/kg ? K D) 2800 J/kg ? K E) 3300 J/kg ? K