1. What is created when the North and South magnetic poles are placed close to each other?
2. What do the blue circles going around the wire represent?
3. What unit of electrical potential is given?
4. Do you think you would get the same outcome if you put the two
North poles together? Explain.

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.

the correct answer is:

a population changes in response to a change in the environment.

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.