In this interactive and animated object, learners use solubility rules to predict when an insoluble ionic compound will precipitate in a double replacement reaction. Four step-by-step examples are given.

Students solve a molarity problem in a drag and drop exercise.

Students practice identifying common elements from the periodic table by name or symbol.

Learners observe that the melting of a solid and the freezing of its liquid occur at the same temperature. The melting point is an intrinsic property and is used to identify a substance.

Students read brief descriptions of atoms, molecules, elements, and compounds, and complete a matching exercise that pictures these particles and molecules as pieces of taffy.

The purpose of this learning object is to introduce the learner to the different processes of science.

Laboratory testing begins with a doctor's order and is followed by specimen collection. In this activity, learners review doctors’ lab orders and select the blood collection tubes required for each patient.

Students read about the basic organization and structure of the periodic table of elements. By clicking on the symbol, they can read that element's atomic number and weight. In an exercise, students identify elements as belonging to a group, a period, or neither.

Students read an introduction to the lab equipment used to contain and dispense chemicals. A quiz completes the activity.

Guess the vocabulary words that appeared in Unit 4.

Characteristics of Porifera and Cnidaria

Brush up your knowledge on key terms from this topic so far.

Focus more on 9.2 Polymer and Glass subtopic, Manufacture Substances in Industry (Chapter 9) (Form 4 Chemistry). Good Luck!