Only eight problems are on this competitive national chemistry exam. It required the balancing of chemical equations, solving stoichiometry questions, and more. This is part two of three of the national exam. Also available is a...

A total of five experiments lead chemistry pros to understand the difference between physical and chemical change. They also experiment with exothermic reaction factors that affect rate of reaction. The procedures are not written in the...

Students explore critical thinking by conducting a reaction time experiment. In this human brain instructional activity, students utilize a timed Internet worksheet activity to research how fast their brain works when answering...

Students participate in a hands-on activity in which they observe the effect of temperature on the rate of chemical reactions. Using Alka Seltzer tablets in different temperatures of water, they record the amount of time it takes each...

Third graders review important vocabulary to explain measures of central tendency and reaction time. In pairs, they measure reaction time of dropping and catching a ruler. Data is collected after repeated catches and information is...

In this chemical reactions worksheet, students determine the reaction rate for various reactions, write balanced equations, create graphs showing the reaction over time, and calculate the activation energy and potential energy. This...

Students listen to a lecture on the collision theory. They discuss the reactant and product changes during a chemical reaction. Students are taught the factors affecting reaction rates. They complete a lab on entropy, heat and free...

High schoolers use the reaction time to figure out problems. They use the following example to get them started with reaction time: the edge of a ruler is placed near a person's thumb and index finger and, without warning, the ruler is...

High schoolers investigate their reaction times for grabbing a dropped ruler after discussing reactions times to other events such as moving your foot from the gas pedal to the brake. They drop the ruler from a sent height and record the...