The picture below shows a geyser in yellowstone national park. which of these processes most likely causes the formation of stream which comes out of the geyser? a. reaction of groundwater with limestone in the rocks b. overheating of air particles near the mouth of the geyser c. boiling of groundwater because of heat under the earths surface d. drop in pressure of the hot groundwater when it rises to the surface

The answer is C. Because the water is hot so it comes out because of steam pressure.

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.