TOPIC: Scientific Method AIM: How can we organize data collected from an experiment? DO NOW: Does the price of sneakers affect how high a person can jump? a.IV = b. DV = c. 2 constants =

GRAPH Visual display of info Organize data to be easily understood

3 TYPES: 1.Bar Graph Compares info

2. Circle Graph (Pie Chart) Compares parts of a whole

3. Line Graph Data changes over time Relationship between variables

DV IV

Average height (cm) Micrograms of gibberelin in a water solution

Population Day A biology student performed an experiment to determine which of two species of single-celled organisms would survive best when cultured together in a certain environment. The student placed 10 organisms of each species into a large test tube. Throughout the experiment, the test tube was maintained at 30°C. After the test tube was set up, the population of each species was determined each day for 5 days. The data collected are shown in the table below.

Final height (cm) Daily light exposure (hours) In an investigation, plants of the same species and the same initial height were exposed to a constant number of hours of light each day. The number of hours per day was different for each plant, but all other environmental factors were the same. At the conclusion of the investigation, the final height of each plant was measured. The following data were recorded: 8 hours, 25 cm; 4 hours, 12 cm; 2 hours, 5 cm; 14 hours, 35 cm; 12 hours, 35 cm; 10 hours, 34 cm; 6 hours, 18 cm.

Average water flea heart rate (beats/min) Water temp (°C) Three students each added equal volumes of pond water to four beakers and placed each beaker in a different water bath. Each student maintained the water baths at temperatures shown in the data table. The students then added an equal number of water fleas to each of their four beakers. After one hour, the students used microscopes to determine the average heart rate of the water fleas. The procedure was repeated for a total of three trials at each temperature.

How to set up your line graph: 1. Label axis with units. 2. Set up scale/intervals on each axis Evenly space out numbers in equal increments (by 1’s, 2’s, 5’s, etc.) Pick one increment and stick with it! Line up numbers on lines, not spaces.

3. Plot points. 4.Connect 5. Create title.

Title: Should compare IV to DV The Effect of IV on DV The effect of distance on light intensity

The Effect of Temperature on Pressure

The Effect of Weight on Flight Time

TYPES OF RELATIONSHIPS: 1.Direct: As one variable increases, the other increases

2. Indirect/inverse: As one variable increases, the other decreases.

Identify the relationships in the following graphs and state the independent and dependent variables.

The data table shows water temperatures at various depths in an ocean. Using the information in the data table, construct a line graph on the grid below.

IV = ? Water depth DV = ? temperature Title = ? The effect of water depth on temperature

What is the temperature of the water at 170°C? 4.6°C How deep is the water when it is at a temperature of 17°C? 60°C

A student counted the total number of leaves in a group of duckweed plants over a 5-day period. The data collected is shown in the table. Using the information in the data table, construct a line graph on the grid below.

123 45

123 45

Type of relationship? Direct IV = ?time DV = ? Number of leaves

The rate of respiration of a freshwater sunfish was determined at different temperatures. The rate of respiration was determined by counting the number of times the gill covers of the fish opened and closed during 1-minute intervals at the various temperatures. The following data were collected. Using the information in the data table, construct a line graph on the grid below.

Temp. (ºC)

Temp. (ºC)

Temp. (ºC) According to the data, as the temperature increases, the rate of respiration of the sunfish a.increases steadily b. decreases steadily c. increases, then decreases d. decreases, then increases 2. Which title is appropriate for this graph? a. The Effect of Temperature on Rate of Respiration in Sunfish b. The Effect of Gill Movement on Rate of Respiration in Sunfish c. The Relationship Between Temperature and Dissolved Oxygen d. The Relationship Between Sunfish Population and Temperature Change in Freshwater Habitats