Respuesta :
Hi!
The answers would be:
1. Dependent Variable: Extent of Corrosion of Metals
A dependent variable is a variable in an experiment which is under study or observation and varies with respect to the independent variable. In this experiment, Madison wants to check the effect on the progression of corrosion of metals with regard to changes in salt concentration, which means corrosion is under observation for any variation with fluctuations in salt concentration of air.
2. Independent Variable: Salt Concentration in Air
An independent variable is a variable that is controlled (increased or decreased, for example), and is known. This variable is not influenced by another variable, for example: a change in salt concentration in air may have an effect on the corrosion of metals, but the phenomena that is the corrosion of metals does not influence the salt concentration in the air.
3. Confounding Variable: Speed of Air
A confounding variable is one which has the capacity to influence/change both the dependent and the independent variable. If the speed of air is higher, it will carry particles of salt at a faster speed and rate (higher kinetic energy) which will result in an increased corrosion of metals. Similarly if the air speed is slower, the corrosion of metals will be decreased. Speed of air also influences the salt concentration as different air currents have the capacity to carry different levels of salt content from the air above the ocean with them.
Hope this helps!
Answer:
Dependent: amount of metal corrosion
Independent: airborne salt concentrates
Cofounding: air temp
Explanation:
The given question is incomplete, the complete question is:
Madison lives near the ocean. She’s formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals. If Madison plans to test this hypothesis, she will have to deal with the following variables in her experiment: dependent variable: independent variable: one possible confounding variable:
Answer:
A variable, which is under study or observation in an experiment and changes concerning the independent variable is termed as a dependent variable. Based on the given experiment, Madison is checking the influence on the progression of corrosion of metals concerning the variations in the concentration of salt. This shows that the extent of corrosion of metals is a dependent variable.
A variable, which can be controlled or monitored like increased or decreased, and one is familiar with is termed as an independent variable. This variable is not affected by another variable, like a change in the concentration of salt is the air may exhibit an effect on the corrosion of the metal, however, the process that is, the corrosion of metals does not affect the concentration of salt in the air. Hence, the independent variable is the salt concentration in air.
A variable that possesses the tendency to change or influence both the independent and dependent variables is known as a confounding variable. If the airspeed is higher than it will carry the salt particles at a brisk rate and speed resulting in enhanced corrosion of metals. Likewise, if the speed of air is slower, there will be a reduction in the corrosion of metals. Hence, the confounding variable is the temperature of the air.
