Questions about example sentences with, and the definition and usage of "Note"

A: Usually when students give notes to each other during class, trying to make sure the teacher does not see

A: ノートを持ってじゃないです

A: Notes are pieces of paper with writing on the paper.

Notes could be - notes taken in a class on the history of Japan.

We call these notes - because they are a brief record of what was said in the class. They help someone remember what was said.

Notes could be something the person wrote about any topic.

The other meaning for notes - as in musical notes written on paper IS NOT what this means

A: when someone says "On a separate note" it means like a different subject they want to talk about.

A: To "hit a note" means that you are able to create the correct tone.

A: It refers to what was just discussed in a conversation. “Planes are constantly coming and going, is there an airport nearby?” “Yes, there is. In fact, on that note (planes-leaving), I have a flight to catch so I’ll see you later.”
———————————————
“My brother is studying in Sweden next year”
“Oh, on that note (Sweden), tell him to try surströmming. I’m sure he’ll love it hahaha”
———————————————
“I love dogs.”
“Oh, on that note (loving dogs), my parents just adopted a new puppy. You should come by!”

A: "Lighten up" is used when someone is being too serious, too sad, too depressed, too pessimistic, expecting the worst, dwelling on negative possibilities. Taking things too seriously. When a person's mood is "down" or "dark" (depressed, sad, worried, etc) or "heavy" (very serious and even stressed a bit). Well, the opposite of that is "light" and "up". So "lighten up" is talking about bringing their mood and their thoughts upward, to something that is lighter (less serious) and brighter (happier, more hopeful, more optimistic, more relaxed). So telling someone to "lighten up" is to encourage them to cheer up, to be more hopeful, to relax a bit more and to stop dwelling on all the serious negative things. Too much worry doesn't help anything.

"Hey, relax, it is going to turn out fine. You need to lighten up. Stop expecting the worst. It'll be fine!"

"He was really sad that day. But after a lot of joking around, we got him to lighten up a bit. He was even smiling by the end of the day."

"Well that's depressing. Being so pessimistic is bad for your health. Lighten up already, it's not actually that bad!"

And yes, "lighten up" is very commonly used in everyday conversation. It is mostly used for a person's mood or attitude. Although something like paint or a room can be "lightened", it is more likely to say that they "lighten it" when talking about the color of paint or an object. And "lighten up" is the phrase for talking about bringing someone's mood up, to be more cheerful or relaxed. So not quite the same phrase.

A: “The chair broke when I sat down! On that note, I think I should lose some weight.”
“My car is so dirty. On that note, I should get a deep cleaning.”

A: This is a common expression. This means they are going to talk about something different than what was being talked about before. Examples:
My mom is sick. On a different note I am feeling much better.
—
Nice talking to you about work. On a different note, how are your kids?
—
That is a really funny story. On a different note, did you see that new movie?

A: you need to wash and clean the table but please note that the table is made of wood so mind which products you use

A: "on another note" may or may not be relevant to the topic. "On an unrelated note" is definitely not relevant to the topic

A: If I say "Please take note of what the speaker is saying." I would expect notes to be written down. I think that's what you're asking. Also, we usually say "should I do something"

A: A: someone will give you a note of some sort

"We would get a note from a teacher "

B: you would take a note from someone or something or you would have to take notes on something like a presentation

"We would take a note from the table and written our name on it"

C: like b except only used for when you are taking notes over a presentation or lecture

"You will have to note all this down for your test"

A: That makes sense. I guess the verb "reviewed" implies a one-time action to me, which is inconsistent with the continuous, durational meaning that "since this morning" has.

A: They are similar and often interchangeable, especially as verbs.
As verbs, the nuance is
note is a stronger in action.
I noted that you came in early today.
(I saw you came in to work early and made a mental note of it.)
I noticed you came in to work early today.
(I saw that you came in to work early, but this was just an observation.)
As nouns,
notice is usually used in official capacity.
There was a notice on the wall announcing that the store was closing.
Note is usually used more personally.
I wrote a note to remind my wife that we needed milk.

A: Like, imagine being sick and still managing to hit every note and doing an amazing job at it. No one can relate except “...”

Are there any mistakes in this sentence?

(Besides the wrong tense, it sounds very natural. I could see someone saying this in a casual conversation.)

A: “There are 10 five dollar notes” is this what you meant?

A: I would like to go to the class again this month. It would be good if the class is on Monday afternoon. Please notify me when the time has been decided. Thank you for keeping me posted.

「今月も」については挙げた例の中どちか使うのか文脈によって決まります。

A: i hope this helps :)

A: Pound is the amount. An example, 10 yen or 10 dollars.

A: × I like to write down some notes on my working paper and name it “my understanding”.
✓ I like to write down some notes on my worksheet and name them “my understanding.”

× I usually write “not certainly right” in brackets to remind me that might be wrong and I might need further comments on it.
✓ I usually write “not certainly right” in quotes to remind myself that they might be wrong and that I might need further comments on them.

you can also substitute “not certainly right” in this case with “not necessarily right” or “not necessarily correct.”

“not certainly right” isn’t incorrect, btw. pairing “necessarily” with “correct/right/wrong” is just something that we seem to do more often in english.

A: × I didn't know there is a note on the fridge.
✓ I didn't know there was a note on the fridge.

Even if the note is currently on the fridge, this sounds natural using past tense:)

A: × When I feel uneasy or annoyed, I make notes about what I am thinking until I'm satisfied.
✓ When I feel uneasy or annoyed, I write down my thoughts until I'm satisfied.

× Making notes develops my thinking and helps me think clearly.
✓ Writing down my thoughts develops my thinking and helps me think clearly.

something about the expression "to take notes" feels more academically related

A: With this in mind; On this subject.

A: × Please note we have a meeting in morning every Monday, so our reply will be at least around afternoon.
✓ Please note we have a meeting every Monday morning, so we will reply by at least afternoon.