The type of joint that allows bones to move backward and forward in only one direction is the hinge joints. Ball and socket are the joints that allows movement in all directions. Gilding joints are type of joints that are the vertebral disks that allow twisting, turning, and sliding. Hinge joints are formed between two or more bones where the bones can only move along one axis to flex or extend. They include the ankle, elbow and knee joints.
A combination of two or more metals is called and Alloy.
Answer:
number 4 41 clay sediment 22 air 9 humus 28 water
There are about 250 chemicals that are harmful including carbon monoxide and ammonia.
Answer: rising sea levels
Harsher/more frequent natural disasters
