Learners read the definition of atomic weight and obtain the weights of elements by viewing the Periodic Table and charts that list atomic weights by name or symbol.

In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.

In this interactive object, the learner practices identifying charges on ions.

Learners read about lab equipment and basic safety measures. In a quiz, they view photos and determine if the lab technicians pictured are using safe practices.

In this animated object, learners examine the properties of the peptide bond and how the bond relates to the structure of hair.

In this animated lesson, learners read about the disulfide bond, the second strongest chemical bond in the hair. This bond can only be altered by chemicals.

In this animated object, learners examine how the heating or cooling steps in a manufacturing process work to control a chemical reaction.

Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

Learners read about lab equipment and basic safety measures. In a quiz, they view photos and determine if the lab technicians pictured are using safe practices.

A Grade 8 Physical Science Heat and Thermal Energy Review

Tế bào nhân sơ, thành phần hóa học tế bào

Stoichiometry and Mixtures terms

Make sure to get the questions right (Rates of reaction) or you will loose and get put in another lobby.