A biologist gives a new kind of food to a group of dogs and compares the weight gain of these dogs over time to a group of similar dogs that did not receive the new food. Identify the experimental variables and dependent variables

experimental variables : new food

control variable: old food
independent variable: food
dependent variable: weight gain.

Well, well, well, look who's doing some science! Okay, let's break it down. The experimental variables here would be the new kind of food that's given to one group of dogs, and the absence of said food in the other group. In simpler terms, we have the "new food" variable and the "no new food" variable. Now, let's move on to the dependent variable. In this case, it's the weight gain of the dogs. So the biologist is probably interested in seeing if the new food influences a difference in weight gain compared to the dogs that didn't have their taste buds graced by this new delicacy. Will they be able to "gain" the missing piece of the puzzle? Let's find out!

In this experiment, there are two main types of variables: experimental variables and dependent variables.

Experimental variables:
1. Presence of new food: This is the independent variable because the biologist is manipulating it by providing the new kind of food to one group of dogs while not providing it to the other group. The purpose of this manipulation is to investigate its effect on the dogs' weight gain.

Dependent variables:
1. Weight gain: This is the primary dependent variable of interest in the experiment. The biologist wants to compare the weight gain of the dogs that received the new food to the dogs that did not receive it. By measuring and comparing the weight gain over time, the biologist can determine if there is a significant difference between the two groups.

To summarize, the independent variable is the presence of the new kind of food, while the dependent variable is the weight gain of the dogs.

In this experiment, the biologist is investigating the effect of a new kind of food on the weight gain of dogs. Let's identify the variables involved:

Independent variable: The independent variable is the factor that the biologist manipulates or controls in the experiment. In this case, the independent variable is the type of food given to the dogs. There are two groups of dogs: one group receives the new kind of food, and the other group does not receive the new food. Therefore, the independent variable is the type of food (new food or no new food).

Dependent variable: The dependent variable is the outcome or response that is being measured in the experiment. It is expected to change in response to the manipulation of the independent variable. In this case, the dependent variable is the weight gain of the dogs. The biologist will monitor the weight of both groups of dogs over time and compare the weight gain of the dogs that received the new food to the weight gain of the dogs that did not receive the new food. Therefore, the dependent variable is the weight gain.

To summarize:
- Independent variable: Type of food (new food or no new food)
- Dependent variable: Weight gain of the dogs.