Will humanity actually consume all of Earth's forms of energy before humans go extinct (or before human planetary migration)?

No, on a technicality.

We might be able to consume all the fossil fuels and mine out all the nuclear fissionable ores but there are always other sources of energy. But there are many MANY non-consumable sources of energy.

Geo-thermal is fairly reliable.

Hydroelectric power is very reliable provided weather patterns don't shift too often, but even then new hydro plants could be built.

Solar and Wind can be used intermittently with their excess being used to pump water uphill to provide Hydroelectric power when needed.

Tidal stations will be viable for as long as the Moon orbits the Earth which is estimated to be longer than the time before the Sun swallows the Earth.

We can create Ethanol fuel by growing and refining sugar cane.

We might even master Fusion which would give us unparalleled quantities of energy by taking the hydrogen atoms from water or other hydrogen rich molecules.

And here's the kicker, we can use those other forms of energy to make whatever oils or oil derived products we might require.

What is the most common reason why someone may see a UFO in the sky?

Unusual cloud formations or other weather conditions.Military or observation aircraft or balloons.Intoxication from drink or drugs, or other mental impairment.Complete fabrications by ufo nuts and those who make money from them by running tours, talks etc.That covers at 99%+ of all

Around how much should a Canadian high-school student charge for private math tutoring of elementary school kids and juniors?

Well I'm not im high school anymore, but I've charged the same rate ever since I was back in high school. I charge 20 an hour for k-9, 25 an hour for 10-12, and now I have the new addition

What are the best science fiction novels?

"Foundation" by Isaac Asimov"The first Foundation trilogy (...) won a Hugo Award in 1965 for 'Best All-Time Series.' It's science fiction on the grand scale; one of the classics of the field,"wrote Brooks Peck."Dune" by Frank Herbert"Herbert created what was, in 1965, the