1 00:00:00,520 --> 00:00:03,800 Speaker 1: Welcome to Brainstuff from house stuff works dot com where 2 00:00:03,840 --> 00:00:15,120 Speaker 1: smart happens. Hi Am Marshall Brain with today's question, what 3 00:00:15,360 --> 00:00:19,120 Speaker 1: is the difference between a hardwood and a soft wood? 4 00:00:19,600 --> 00:00:22,279 Speaker 1: When we talk about a hardwood floor, what are we 5 00:00:22,320 --> 00:00:26,159 Speaker 1: actually talking about? As it turns out, a hardwood is 6 00:00:26,239 --> 00:00:31,360 Speaker 1: not necessarily a harder material. It's not more dense or 7 00:00:31,520 --> 00:00:35,680 Speaker 1: somehow stronger, And in the same way, a softwood is 8 00:00:35,720 --> 00:00:40,080 Speaker 1: not necessarily a softer material, meaning less dense or softer 9 00:00:40,560 --> 00:00:44,559 Speaker 1: or less strong. For example, balsa wood is one of 10 00:00:44,600 --> 00:00:48,760 Speaker 1: the lightest, least dense woods. There is easily dented with 11 00:00:48,840 --> 00:00:52,880 Speaker 1: your fingernail, and it's considered a hardwood. So what's going 12 00:00:52,960 --> 00:00:57,720 Speaker 1: on here? The distinction between hardwood and softwood actually has 13 00:00:57,760 --> 00:01:03,760 Speaker 1: to do with plant reproduction. All trees reproduced by producing seeds, 14 00:01:03,800 --> 00:01:09,720 Speaker 1: but the seeds structure varies. Hardwood trees are angiosperms, plants 15 00:01:09,760 --> 00:01:13,640 Speaker 1: that produce seeds with some sort of covering. This might 16 00:01:13,760 --> 00:01:16,880 Speaker 1: be a fruit like an apple or a hard shell 17 00:01:17,040 --> 00:01:20,880 Speaker 1: like an acorn. Soft Woods, on the other hand, are 18 00:01:21,000 --> 00:01:25,440 Speaker 1: gymnas sperms. These plants let seeds fall to the ground 19 00:01:25,600 --> 00:01:29,920 Speaker 1: as is, with no covering. Pine trees, which grows seeds 20 00:01:29,920 --> 00:01:34,600 Speaker 1: in hard cones fall into this category. In conifers, like pines, 21 00:01:35,000 --> 00:01:38,280 Speaker 1: these seeds are released into the wind once they mature. 22 00:01:38,920 --> 00:01:43,319 Speaker 1: This spreads the plants seed over a wider area. For 23 00:01:43,400 --> 00:01:48,040 Speaker 1: the most part, angiosperm trees lose their leaves during cold weather, 24 00:01:48,080 --> 00:01:53,080 Speaker 1: while gymnasperms trees keep their leaves all year round. So 25 00:01:53,200 --> 00:01:56,360 Speaker 1: it's also accurate to say that evergreens are soft woods 26 00:01:56,400 --> 00:02:01,080 Speaker 1: and deciduous trees or hardwoods, the hardwood saw wood terminology 27 00:02:01,160 --> 00:02:05,200 Speaker 1: does make some sense. Evergreens do tend to be less 28 00:02:05,240 --> 00:02:08,840 Speaker 1: dense than deciduous trees, and therefore they're easier to cut, 29 00:02:09,280 --> 00:02:13,639 Speaker 1: while most hardwoods tend to be more dense and therefore sturdier. 30 00:02:14,160 --> 00:02:18,160 Speaker 1: But as the classification of Boston wood demonstrates, there's no 31 00:02:18,360 --> 00:02:23,320 Speaker 1: minimum weight requirement to become a hardwood. For more on 32 00:02:23,440 --> 00:02:25,840 Speaker 1: this and thousands of other topics, does that how stuff 33 00:02:25,840 --> 00:02:27,960 Speaker 1: works dot Com and don't forget to check out the 34 00:02:27,960 --> 00:02:30,000 Speaker 1: brain stuff blog on the how stuff works dot com 35 00:02:30,040 --> 00:02:32,880 Speaker 1: home page. You can also follow brain stuff on Facebook 36 00:02:32,960 --> 00:02:35,320 Speaker 1: or Twitter at brain stuff hs W