I very much dislike this class. Basically, Science 20 (and 30) take bits and pieces of the 20 and 30 level Physics, Chemistry and Biology classes, cram them together and just skip from highlight to highlight without ever giving the actual background and explanation of how and why things work, which makes things way harder to understand and grasp for students (in my opinion). This ain't science, this be witchcraft!

This unit will be a mishmash of topics from the Organic and Electrochemistry unit from Chemistry 30, as well as from the Stoichiometry and Solution units from Chemistry 20. The hardest part of Organic and Electrochemistry is labeling things properly, while both Stoichiometry and Solutions have some math in them.
This unit will be a mishmash of topics from the Biosphere and Evolution units from Biology 20 and the Population Dynamics unit from Biology 30. Lots of talking and describing things.
This unit will be a mishmash of topics from the Kinematics unit of Physics 20 and the Momentum unit of Physics 30. These are probably the easier topics from the Physics curriculum, but there's some serious math involved, mostly trigonometry (vector calculations) and solving equations. Keep your signs straight.
Okay, so, not all of Science 20 is a recycling of topics from the "real" science courses. This unit has a lot of original content not found in another course. We talk about rocks and volcanoes and earthquakes. The carbon-dating topic is a rehash of radioactive decay in Physics 30, again without the background.