Chemical bonding happens when two or more atoms join together to form a molecule. It is a general principle in science that all systems will try to reach their lowest energy level, and chemical bonding will only take place when a molecule can form that has less energy than its uncombined atoms.hemical bonding happens when two or more atoms join together to form a molecule. It is a general principle in science that all systems will try to reach their lowest energy level, and chemical bonding will only take place when a molecule can form that has less energy than its uncombined atoms.
Human beings were able to create tools around 2.5 million years ago-but we first made bows and arrows 64,000 years ago. The invention of the weapons was a huge leap for our ancestors, enabling them to hunt far more effectively.
The bow and arrow is a projectile weapon that predates recorded history and is common to most cultures. Archery is the art, practice, or skill of applying it. Katniss Everdeen uses a bow to hunt for food in the woods, and it becomes her weapon of choice in the arena during the 74th Hunger Games and 75th Hunger Games.Gale Hawthorne is also a skilled archer, learning his skills from Katniss, who in turn learned from her father, Mr. Everdeen.esign. A bow with an arrow. A bow's power is referred to as its draw weight, which is measured by the pounds of pressure it takes to pull the draw string to the point from where the arrow is released. The arrows are straight pieces of wood, carbon fiber, or light metal.