13. What's the relationship between the temperature and the density of a substance?
O A. As the temperature increases, the density decreases.
O B. Temperature doesn't affect the density of a substance.
C. Temperature decreases the density of a substance only at high altitudes,
O D. As the temperature decreases, the desity decreases.

THE ANSWER IS... A

Explanation:

Temperature and density are inversely related. This means that when temperature is increased, the density will decrease and vise-versa.

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

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.