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Model for a Lab Report. Question. Does the temperature affect the speed at which a cricket chirps?. Background Information. Only male crickets chirp in order to attract females and to act as a warning to other male crickets to stay out of their territory.
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Question • Does the temperature affect the speed at which a cricket chirps?
Background Information • Only male crickets chirp in order to attract females and to act as a warning to other male crickets to stay out of their territory. • Crickets chirp primarily at nightbecause they are nocturnal insects, but sometimes eat in the daytime. • Male crickets rub their wings, not their legs, to chirp. The underside of a male cricket's wing is rough and the top side is contoured differently. When rubbed together, they make a chirping sound. • Crickets will not chirp if the temperature is below 40 degrees Fahrenheit (°F) or above 100 degrees Fahrenheit (°F) because they cannot survive at these temperatures. • Crickets have a higher metabolism and are more active at warmer temperatures.
Hypothesis If _{manipulated variable}_, than __{responding variable}, because __{background knowledge}__. • If the temperature was increased, than the cricket would chirp faster because they are more active and have faster metabolism in warm weather.
Materials • 50 common house crickets • 2 empty 10 gallon aquarium tank • Pet heat rock • Thermometer • Ice cubes • Sealable plastic food bags • Tape recorder • Paper and pencil
Procedure Obtain 50 common household crickets. • Place 25 crickets in one aquarium and 25 crickets in the other with food and water in the exact same conditions. 2. Place a thermometer in the containers with the crickets. 3. Raise the temperature of one aquarium by placing a heat rock in the container for one hour. Record the temperature and tape record sounds for 10 minutes. Determine chirps/minute and record data. 4. Lower the temperature in the other container by placing sealable plastic food bags filled with ice cubes into the containerfor one hour. Record the temperature and tape record sounds for 10 minutes. Determine chirps/minute and record data.
Graph • What kind of graph would best suit this data? • Would you use each data point or the average? • What would a good title for the graph be? • What label would you put on the x axis? • What label would you put on the y axis?
ConclusionNeeds all 5 bullets to be complete • Answer the investigative question. 1. Temperature does affect the speed at which a cricket chirps.
Was the hypothesis supported by the data? 2. My hypothesis was supported by my data.
What was the data? Give the high and low numbers. You would also add any other observations, such as mortality rate, color change, activity levels, etc. • 3. • At warm temperatures the average chirps per minute was 197. • At cool temperatures the average chirps per minute was 119. • Also at the cool temperatures the crickets stopped eating and moving around. • There was a high mortality rate. 5 crickets died in the cool temperatures and 6 died in the warm temperatures.
Explain what your data means. • 4. • This means that when temperatures are higher than the crickets will chirp faster. As it gets colder their chirps slow down possibly due to a lower metabolism and activity level. There was also some mortality, but not a significant difference between the two temperatures.
Validity factors/Considerations • 5. • Next time I would consider doing the experiment with a different species of crickets to see if temperature also affects them. I also wonder if other factors such as the food available may have an affect. • I would also use more specific temperatures. • Since I had a high mortality rate, I would also use larger containers and have fresh water available daily.
