Final answer:
Wood density refers to its mass per unit volume, and you are seeking wood with 0.7 g/cm³. Oak has a density slightly higher than this value, while balsa has a much lower density. To find a wood type with the exact density you're referencing, it may involve looking at less dense hardwood or denser softwood variations.
Step-by-step explanation:
Wood density is a measure of how compact the wood is, which determines its weight per unit of volume. In seeking wood with a density of 0.7 g/cm³, you're looking for a type of wood that has its weight very close to this value for every cubic centimeter. The example given is oak, which typically has a slightly higher density than 0.7 g/cm³, specifically 0.71 g/cm³. On the other hand, balsa wood is known for its very low density of 0.15 g/cm³. Densities can be abbreviated in various ways including g/cm³, g cm⁻³, or grams per cubic centimeter. When comparing different types of wood, it is important to consider that densities can vary based on factors such as moisture content and how the wood was grown. To find wood with the exact density as mentioned, one might need to look into a species with similar characteristics to oak but slightly less dense.
A common wood type with a density around the mentioned value might be a softer hardwood or a denser variety of softwood. It is worth noting that wood density can vary within a species and between individual trees, so it is not always exact. Therefore, practical identification would involve measuring and weighing a sample of the specific wood.