Shells

In this atom instructional activity, chemists learn how to determine the number of protons, neutrons and electrons in an atom using the atomic mass and atomic number. They complete a chart of the subatomic particles and use marbles to...

Does a shell define a turtle, or are there turtles without shells? Learn about the evolution of the unique reptile and the mystery that surrounds this identifiable feature as part of a larger series of videos. As various disciplines...

The ancestors of squid and octopus used shells as a form of defense. Pupils learn how cephalopods evolved without shells and the adaptations required to survive without one. Viewers learn how scientists know about these changes and the...

Snails range from 0.5 mm to 61 cm long. The video explains the huge variety of snails crawling the earth. It includes snails with iron shells, snails that are venomous, and even snails that collect other snails! It highlights the unique...

Shell-building animals are resourceful creatures! An interesting video lesson describes how they use calcium and carbonate ions in the ocean to form their shells. The process is dependent on the equilibrium of calcium and carbonate ion...

Does a single-celled organism know more about the history of our planet than we do? A video explains how single-celled organisms manage to build a house and hold the secrets to the weather. They contain the information about the changes...

Is your class in a quandary over quantum numbers? Change things up by adding games to the mix! Science scholars discover the shape, number of electrons, and number of orbitals in the s, p, and d sub-shells using an interactive.

It often feels like homes need constant work and repairs. Mollusks might feel the same way since they continually repair their shells. A video presents an explanation of how mollusks can survive even a deep crack. Viewers observe the...

How do turtle shells form? Scholars explore the evolution of turtle shells and learn about how they form from many different bones before relating the process to cell differentiation in an organism. Pupils also look at different turtle...

Students review the terms and concepts: evolution, selection, biotic, and abiotic factors. They come up with hypotheses about limpet shell types based on what we discuss about intertidal environments. Students use ratios to compare...