Question

3.) growth o development
4.) metabolism
5.) homeostasis

1. terry loves birds and wants to see as many as she can in her yard. she wants to know whether she is wasting money buying an expensive mixed seed, when a cheaper brand just arrived at her local store. she wonders... will the expensive seed attract more birds to her back yard? identify the independent variable, dependent variable, and constants in this experiment.

Explanation:

Step1: Define independent variable

The factor that is changed is the type of bird - seed (expensive vs cheaper), so the independent variable is the type of bird - seed.

Step2: Define dependent variable

The factor that is being measured and is affected by the independent variable is the number of birds attracted to the backyard. So the dependent variable is the number of birds in the backyard.

Step3: Define constants

Constants are factors that remain the same throughout the experiment. In this case, the backyard location (since it's her backyard), the time period of observation, and the bird - feeding setup (if not changed) are constants.

Answer:

Independent variable: Type of bird - seed (expensive or cheaper)
Dependent variable: Number of birds in the backyard
Constants: Backyard location, time period of observation, bird - feeding setup