Where does the mass for a growing tree come from? Scholars consider a few different hypotheses and guess which is correct. They then analyze data from different experiments to understand which concepts science supports.

In this DNA worksheet, students will review vocabulary about the structure and characteristics of DNA and the processes of replication and mutation. 3 true or false questions, 6 matching questions, 5 fill in the blank statements.

Students investigate acids, bases, and pH, and related this knowledge to the problem of acid deposition.

Students become aware of the environmental problems caused by acid rain and study the pH scale. They determine acidity of local rain water.

Students cut out the nucleotide models and have an opportunity to relax and chat. Using imagination, students pretend to be molecules acting out protein synthesis and whole body movement.

In this DNA: structure and replication learning exercise, students fill in the blanks about the structure of DNA and replication of DNA. Students sketch several diagrams of DNA at different stages.

Students study La Chatelier's principle and identify how carbon dioxide may affect pH.  In this coral lesson students complete a worksheet on pH and observe a lab.

In this neutralization reaction worksheet, students read about how neutralization reactions are double replacement reactions in water. They complete five questions about neutralization reactions including completing five reactions and...

Students read about Humane Genome Project, examine structure and function of DNA, and participate in gel-electrophoresis lab. They complete Internet activity to test their knowledge of DNA.

High schoolers engage in solving a logic problem based on real organisms and real data. They develop phylogenies for seven related populations of lizards living on the Canary Islands.

In this genetics worksheet, students complete 3 short answer, a word puzzle, and 7 word games about genetic traits.

Seventh graders explore the connection between genetics and heredity by examining the cellular structure. Among the numerous activities to engage students are drawing DNA molecules, vocabulary puzzle sheets, and predicting possible...

Students are introduced to mapping by crossover frequency. Genes travel as packaged trains on chromosomes. They use this experiment, genetic mapping assignment, that allow students to quickly complete the assignment and yet examine the...

Tenth graders work in teams to order events of DNA transcription and translation protein synthesis. In the second lesson, they put the steps of mitosis and meiosis in order using a concept map poster. They use modeling clay to create...

A 30-question multiple choice chemistry test challenges takers. Topics touched upon include thermochemistry, equilibrium, behavior of gases, and pH. Problem solving is required in order to answer most of the questions. Other questions...

Students investigate how mutations lead to changes in cell structure and function. They construct an oligonucleotide, identify a protein sequence, design a step-by-step mechanism of how they think cells repair damaged DNA, and prepare...

Advanced biology masters take a close look at DNA and the scientists who contributed to our understanding of this complex and powerful molecule. They answer 21 questions about DNA structure, replication, and repair. This can be used as a...

Eighth graders determine which of two solutions is more acidic by adding each to a given base. Students have to apply this analysis process to a problem scenario involving an alien creature.

A very well-designed lesson plan focuses on the many benefits of Omega Fatty Acids. Learners read some articles on omega fatty acids, then access a glossary that is included in the plan. They fill in terms along with their definitions....

Young scientists create monsters by applying their knowledge of transcription and translation. They randomly find the DNA, assign it a codon, and build monsters piece by piece. 

Sixty multiple-choice questions test on a variety of first year chemistry subjects. In order to succeed, exam takers must be competent with properties of elements, stoichiometry problems, gas laws, bond dissociation, and types of...

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...

From their sweat to the water vapor in their breath, astronauts recycle every possible drop of water while in space. After watching a short video describing the different ways materials are recycled and reused in space...

Scientists have been studying exothermic reactions before they were cool. The lesson begins with a discussion and a demonstration of heat curves. Scholars then determine the heat of fusion of ice and the heat needed to...