Appears to be made out of some kind of tree

Judging by the knots my best guess would be pine. Hard to tell without seeing it in person

Another vote for pine.

If it is so heavy that when you try to move it, it makes you say "shit i didn't expect it to be this heavy", then it might not be pine.

Appears to be a cellulose fiber based lignin matrix

I'm almost certain this is pine, the grain lines are very spaced apart, suggesting it was grown very rapidly too, so probably not a very old table.

Another vote for pine. That said, I think that pine gets a bit of a bad rap. Other than its softness, it's a fine wood to use. I have pallet and firewood laminated desk that has it's fair share of pine in it and the pine strips are not any worse for wear than anything else.

The knots and colouring suggest pine, I'd say.

I think I'm leaning toward pine as well. You could cut into it and smell, I imagine most people now the scent of pine since it's a popular air freshener/household cleaner scent for some reason (I'm from a pine forest, pine doesn't smell 'clean' to me.)