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Warm up 2/11/14

Warm up 2/11/14. Question : How many experimental variables should you manipulate during an experiment? Answer: only one Goal: I will use the photogate s to calculate the speed of the car . Element of the day. 57 – Lanthanum – La

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Warm up 2/11/14

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  1. Warm up 2/11/14 • Question: How many experimental variables should you manipulate during an experiment? • Answer: • only one • Goal: I will use the photogates to calculate the speed of the car.

  2. Element of the day • 57 – Lanthanum – La • Lanthanum is the first of the rare earth elements, the two rows at the bottom. These elements aren’t actually that rare, but are found in ores together and are very similar in their properties and are hard to separate – this is where they get their name. • Lanthanum is one of the most abundant rare earth metals – actually more common than lead. • It is found in an alloy called “mischmetal” which is mostly cerium and lanthanum and isn’t in any particular ratio, because it doesn’t really matter. Mischmetal is used in lighter flints and special effects where sparks are needed.

  3. Warm Up • Lab 4A • Course Cards • Tonight’s HW • Lab pg M Agenda / HW

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