1.Which of the following is an example of a non-renewable resource? A. Wind
B. Solar (Sun)
C. Trees
d. petroleum

2.Burning fossil fuels releases which gas into the air, making the Earth warmer?

A. Oxygen
B. Water
D. Nitrogen
D. Carbon Dioxide

Calculate the number of molecules present in 0.750 mol of mgo.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

According to le chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress. normalizes the stress. increases the stress. changes the stress.