So much is great about this video. Thank you Ms. Gravil! There are two mistakes on this video that are of note. When making measurements with demarcations, the value recorded should always have one final estimated digit past the decimal point of the demarcations. So this balance should be reported to the hundredths place, not the tenths. Also, she mentions that the demarcations are "milligrams," which they are not. They are decigrams.
Actually, you are incorrect. For the water displacement method you have to slide the object in on an angle so no water splashes out of the graduated cylinder and ruins the calculation. It is very important to keep all of the water in the graduated cylinder so you get the correct calculations and get the correct volume.
It's a shame when teacher's cop out with "it just is". The conventional symbol for current is I, which originates from the French phrase intensité du courant, (current intensity). ... The I symbol was used by André-Marie Ampère, after whom the unit of electric current is named, in formulating Ampère's force law (1820). -2 seconds on Google. Too easy.
a cop out? learning about electricity for the first time is a lot. even though it might be interesting to some minority of kids, it's probably best not to get bogged down with trivia that will never come up in real world applications.
