Why Hardwoods Are The Softest Woods

TL;DR

The terms "hardwood" and "softwood" don't necessarily correlate with the actual hardness of the wood, but rather stem from historical logging practices and genetic classifications.

Transcript

Do you know any hardwood trees? You’re probably thinking of a tree like oak, whose, well, hard wood is used for making sturdy furniture and long-lasting campfires. But guess what other tree is a “hardwood”? Balsa – that lightweight, some might even say soft wood that people use for making model airplanes. So, “hardwood” doesn’t necessarily mean tha... Read More

Key Insights

• 💇 Historically, the terms "hardwood" and "softwood" were coined based on how difficult they were to cut down, not on the actual hardness of the wood.
• 🍃 Genetic traits such as broad leaves and flowers classify trees as hardwoods (angiosperms) and needle-like leaves categorize them as softwoods (gymnosperms).
• 🌲 The Janka hardness scale measures the force required to puncture wood and shows the varying levels of hardness among different tree species.

Questions & Answers

Q: Why are some hardwood trees not necessarily hard and vice versa?

The terms "hardwood" and "softwood" originated from the historical difficulty loggers faced when cutting down certain trees, not from the actual hardness of the wood itself.

Q: How do genetic traits play a role in categorizing trees as hardwood or softwood?

Genetic classifications, such as angiosperms (hardwoods) having broad leaves and flowers, and gymnosperms (softwoods) having needle-like leaves, contribute to grouping trees into these categories.

Q: What influences the hardness of softwood trees?

Softwood hardness is influenced by the speed of growth - faster growth leads to softer wood with thinner cell walls, while slower growth results in denser and harder wood.

Q: Why do hardwood trees exhibit more species diversity than softwood trees?

Hardwood trees have co-evolved with animals that aid in pollination and seed distribution, allowing for a wider spread of species diversity compared to softwoods.

Summary & Key Takeaways

• Hardwood and softwood trees are not categorized based on actual hardness, but on historical logging difficulty and genetic groupings.

• Angiosperms, or hardwoods, have broad leaves and flowers, while gymnosperms, or softwoods, have needle-like leaves and unencased seeds.

• The Janka hardness scale measures the force required to penetrate wood and shows the varying hardness levels among different tree species.