Question

URGENT!

A series of experiments are conducted with five different cups, each filled with the same amount of water. One cup is kept at room temperature (25 °C), while the other four cups are heated to four different temperatures. Sugar is added to each cup until no more will dissolve. The amount of sugar added to each cup is recorded. Which answer correctly identifies the control group, independent variable, dependent variable, and controlled variable in the experiment?

Control Group: temperature of the water Independent Variable: cup of water at room temperature Dependent Variable: amount of sugar dissolved Controlled Variable: amount of water in each cup

Control Group: temperature of the water Independent Variable: cup of water at room temperature Dependent Variable: amount of water in each cup Controlled Variable: amount of sugar dissolved

Control Group: cup of water at room temperature Independent Variable: temperature of the water Dependent Variable: amount of sugar dissolved Controlled Variable: amount of water in each cup

Control Group: temperature of the water Independent Variable: amount of sugar dissolved Dependent Variable: amount of water in each cup Controlled Variable: cup of water at room temperature

Answer 1

In this experiment, the control group is the temperature of the water. The independent variable is the cup of water at room temperature. The dependent variable is the amount of water in each cup.

Step-by-step explanation:

In this experiment, the control group is the temperature of the water. The independent variable is the cup of water at room temperature, meaning that it is the variable that is purposely changed. The dependent variable is the amount of water in each cup, which is what is being measured or observed to see how it changes in response to the independent variable. The controlled variable is the amount of sugar dissolved, which is kept constant throughout the experiment.

For the second experiment, the control group is again the temperature of the water. The independent variable is the amount of sugar dissolved, meaning that it is the variable that is being intentionally changed. The dependent variable is still the amount of water in each cup. The controlled variable is the cup of water at room temperature, which remains the same in each experimental condition.

Answer 2

Either the first one or the third one.

Step-by-step explanation:

Using process of elimination: knowing that the controlled variable is something the conductor is able to control and stays the same throughout; the amount of water is the same, but it also states that temperature is not the same throughout. This cancels out B because the amount of sugar dissolved varies and doesn’t stay the same. D fits the same criteria as well.

so now we are left with A and C.

An independent variable is something that can be by itself and doesn’t depend on anything else. Sugar is NOT independent, as it dissolves DEPENDING on the amount of liquid. So we can already rule out that sugar is a dependent variable. Both A and C have those choices though, so now we are with the control group and the independent variable.

Think about it, which is the independent variable? Water amount doesn’t depend on anything, while the temperature depends on the room. So the answer is most likely A.

Hope this helps, don’t stress about homework. Happy Holidays!