What are dark lines ​

An absorption line in an electromagnetic spectrum, appearing as a black line at visible wavelengths. ... 'Each element or compound in the sample absorbs particular wavelengths of light, resulting in one or more dark lines on its spectrum. '

Explanation:

An absorption line in an electromagnetic spectrum, appearing as a black line at visible wavelengths

Explanation:

i don't know, but does anyone wanna be friends? i'm doing my homework at 1: 49 in the morning : /

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.