Law of Definite Proportions
The law of definite proportions states that a chemical compound always contains exactly the same proportion of elements by mass. The French chemist Joseph Proust conducted several experiments between 1798 and 1804 to make this discovery. At the time (before Dalton had proposed his atomic theory)...https://education.ti.com/en/activity/detail/law-of-definite-proportions
Molar Gas Lab
Students use stoichiometry to determine the mass of oxygen gas in a bottle. They may also check their answer against the amount of potassium chloride produced during the reaction.https://education.ti.com/en/activity/detail/molar-gas-lab
Mole Activity
This activity is intended to help students gain an understanding of the mole concept. By determining the molar mass of the element at each station, students will be able to identify the element. Students will learn that the molar mass of each element is unique and different, although the number...https://education.ti.com/en/activity/detail/mole-activity
Variety is the Spice of Life
In this activity, students will collect data on all members of the class. They will make a graph of the data collected, interpret variations, and then draw conclusions.https://education.ti.com/en/activity/detail/variety-is-the-spice-of-life
Investigating of pH and Conductivity during a titration of a diprotic acid
In this investigation sulfuric acid will be added to a solution of Ba(OH)2 using a pH probe and a conductivity probe. From this process the pH of first and second equivalence points will be determined along with mapping the conductivity during the titration process.https://education.ti.com/en/activity/detail/investigating-of-ph-and-conductivity-during-a-titration-of-a-diprotic-acid
Vernier - Enzyme Action: Testing Catalase Activity
Students will use an O2 Gas Sensor to measure the amount of O2 produced when H2O2 is broken down by the enzyme catalase at different concentrations, pH values, and temperatures. They will also measure the enzyme's initial reaction rates.https://education.ti.com/en/activity/detail/vernier--enzyme-action-testing-catalase-activity
Vernier - Photosynthesis and Respiration
Students use the gas sensors to measure the amounts of oxygen and carbon dioxide consumed or produced by a plant during respiration and photosynthesis. They also determine the rate of respiration and photosynthesis in a plant.https://education.ti.com/en/activity/detail/vernier--photosynthesis-and-respiration
Enthalpy of an Ion
Students will explore exothermic and endothermic reactions and create a classroom calorimeter to measure energy of a reaction.https://education.ti.com/en/activity/detail/enthalpy-of-an-ion
The River of Life
In this activity, students compare human body mass with blood volume. They graph the data and build a regression model. They estimate their own blood volume and also predict volumes of blood for other animals.https://education.ti.com/en/activity/detail/the-river-of-life_1
Finding the % salt in seawater
In this experiment, students are asked to collect data in order to prepare a calibration curve showing the relationship between the % of salt and the mass of salt water. Using this graph, students will be able to determine the concentration of salt in a sample of ocean water. The activity provid...https://education.ti.com/en/activity/detail/finding-the--salt-in-seawater
Science TODAY™ - More of U.S. (formally Science TODAY™ - More the Merrier)
Students examine the USA TODAY Snapshot™ "More of U.S.", construct a graph from the data, produce a mathematical model (linear) for the data, determine the rate of change for the data, and make predictions about future population levels.https://education.ti.com/en/activity/detail/science-today--more-of-u-s--formally-science-today--more-the-merrier
Vernier - Microscale Acid-Base Titration
In this activity, students' will use a pH sensor to determine the change in pH during a titration of a known concentration of NaOH and unknown concentration of HCl. Students' will determine the concentration of unknown HCl.https://education.ti.com/en/activity/detail/vernier--microscale-acidbase-titration
Science TODAY™ - The USA's Expanding Weight Problem
This activity reveals the incidence of obesity in the United States. Students will analyze "The USA's expanding weight problem" and other data to construct a graph, analyze the trends in the data, and make predictions about the future.https://education.ti.com/en/activity/detail/science-today--the-usas-expanding-weight-problem
Vernier - Mix it Up: Combining Liquids of Different Temps
Students use the EasyTemp Probe to measure the temperature of hot and cold water before and after mixing. Students compare the mixing temperatures to a linear prediction. EasyData™ is needed for this activity.https://education.ti.com/en/activity/detail/vernier--mix-it-up-combining-liquids-of-different-temps
Seed Growth
To observe germination and understand plant seeding development. To use the graphics calculator to find the line of regression.https://education.ti.com/en/activity/detail/seed-growth
Gas Lab
Students determine the molecular weight of a pure gas in a balloon by using gas laws and trapping the gas in a glass bottle. Students watch the instructor demonstrate the lab on day one. On day two and three they practice the lab. On day four we discuss the lab and all the calculations. On da...https://education.ti.com/en/activity/detail/gas-lab
Vernier - pH
Students use a pH sensor to measure the pH level of water in a stream or lake. They examine how air pollutants like sulphur dioxide, nitrogen oxides, and carbon dioxide cause acid rain, which affects the pH of water bodies and aquatic organisms.https://education.ti.com/en/activity/detail/vernier--ph
Gas Laws introduction (Boyle's and Charle's Law)
The activity contains a simulation of Boyles law and Charles law.https://education.ti.com/en/activity/detail/gas-laws-introduction-boyles-and-charles-law
Sheep Selection Program
Students perform one-variable statistical analysis on birth weight data of a flock of sheep. Primary emphasis in a sheep selection program should be based on the number of lambs born and weaned per ewe exposed (permitted to mate with a ram during a specific time frame determined by the shepherd, ...https://education.ti.com/en/activity/detail/sheep-selection-program
Something's Fishy
In this activity, students examine the size, mass, and growth rates for three species of fish. They interpolate and extrapolate from best-fit models. Students compare the growth rates of endothermic and exothermic animals.https://education.ti.com/en/activity/detail/somethings-fishy
What Does a Buffer Do?
Buffers are solutions that resist a change in pH. In this activity, students will add HCl dropwise to a measured amount of water, monitoring the pH. Students then repeat the process, using a simple buffer prepared by combining baking soda and tonic water. A comparison of the results will allow...https://education.ti.com/en/activity/detail/what-does-a-buffer-do
Half-Life Lab
This activity explains how students use a CBL2 and TI-83 or TI-84 calculator to collect and calculate the half-life of a barium isotope. Students will use an isogenerator to milk out a meta stable isotope of Barium with a short half-life. Using a radiation monitor linked to a CBL2, students run...https://education.ti.com/en/activity/detail/halflife-lab
Vernier - Dissolved Oxygen
Students use the Dissolved Oxygen Probe to measure the concentration of dissolved oxygen in water from streams and rivers. They correlate the availability of dissolved oxygen to temperature, pressure, and salinity.https://education.ti.com/en/activity/detail/vernier--dissolved-oxygen
The Bigger the Better?
In this activity, students calculate the surface area and volume of different shaped cell models. They develop an understanding of the differences in cells and their functionhttps://education.ti.com/en/activity/detail/the-bigger--the-better