Question

data collection: pinkys science fair project focused on an observation that crickets outside her window chirped less frequently when the temperature was colder. fun fact: there are free \cricket chirp calculators\ online which you can explore, which didnt exist freely online when pinky was in junior high. consider if data was collected consisting of the average number of cricket chirps at different temperatures in her backyard. 10. which variable would be an independent variable? 11. which variable would be a dependent variable? 12. which variable ( #10 or #11 ) would ideally be plotted on the x - axis of a graph? 13. in the collection of data, list at least 3 important constants (also known as \controlled variables\)? 14. brainstorm and write at least 3 potential challenges or important points to consider when conducting the described data collection. example: repeated trials are not mentioned, and this would be important for optimal data collection.

Explanation:

Step1: Identify variables

The independent variable is the one that is changed or controlled. Here, the temperature is what is changing and affecting the other variable, so the independent variable is temperature.

Step2: Determine dependent variable

The dependent variable is the one that is being measured and is affected by the independent variable. The number of cricket chirps is being measured and is affected by temperature, so the dependent variable is the number of cricket chirps.

Step3: Consider controlled variables

Controlled variables are kept the same to ensure accurate results. Three important constants could be: the location (always the backyard), the type of cricket (assumed to be the same species), the time of day (if measured at the same time each day).

Step4: Analyze data - collection challenges

1. Weather conditions other than temperature (like humidity) could affect cricket - chirping behavior but are hard to control precisely.
2. There could be variations in the cricket population (different individual crickets may chirp at different rates).
3. Measurement error: accurately counting the number of chirps in a given time interval can be difficult.

Answer:

1. Temperature
2. Number of cricket chirps
3. Location (backyard), type of cricket, time of day
4. Humidity variations, variations in cricket population, measurement error