Answer:
C Yellow or red hues in the soil indicate the presence of iron or aluminum.
Explanation:
Soil color depends on different variables in soil. Some of these are the type of minerals or the porosity of the soil. Yellow or red hues in the soil indicate the presence of iron or aluminum. This is because of a particular mineral in the soil. In this case, it is iron or aluminum. A yellow-or-red-colored soil shows there is oxidized iron.
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Answer:
C. Independent variable
Explanation:
The independent variable in an experiment is the variable that the experimenter manipulates or changes in order to effect a measurable response in the dependent variable.
According to this question, an experiment is conducted to determine what concentration of disinfectant is most effective in killing bacteria. The independent variable is the CONCENTRATION OF DISINFECTANT because it is the variable being changed or manipulated.
The process is Photosynthesis
Answer:
Heat decrease the thermal energy of an object as energy moves to the air. Heat causes the thermal energy of the object to increase as energy moves from warmer air to the colder object