World Book Trivia Quiz For Kids--1/23-bones

Explanation
Bone is the hard material that forms the skeleton in people and other animals with backbones. All the separate parts of the skeleton are also called bones. People have about 200 bones.

Explanation
The places where bones meet are called joints. Many joints, such as elbows and knees, move freely.

Explanation
Much of the weight and strength of bones comes from minerals, especially calcium. People need calcium and vitamins to keep their bones strong and healthy.

Explanation
Many animals without backbones, such as insects and lobsters, have a hard body covering. This covering is called an exoskeleton because it is on the outside of their bodies. The exoskeleton supports and protects the soft parts of their bodies.

Explanation
A funny bone is not a bone at all, and it's not funny either. It is an area at the end of your elbow that can be hurt easily. The ulnar nerve lies in this area between the skin and the bone. Nerves are bundles of fibers throughout your body. These fibers carry feelings of pain to your brain.

Explanation
Invertebrates are animals without backbones. The bones that make up the backbone are called vertebrae. Invertebrate means without a backbone. Animals with backbones are called vertebrates.

Explanation
Legs are parts that support the bodies of people or animals. They are used to stand and move. In people, the thigh has the longest, strongest bone in the body.

Explanation
X rays are one of the most useful forms of energy. Doctors use X rays to make special pictures, called radiographs, of the bones and organs inside the body. Such X-ray pictures help doctors see broken bones, lung disease, or other problems without having to cut into the body. They are a form of energy called electromagnetic radiation. X rays cannot be seen.

Explanation
Neandertals had a large, projecting face with a low, sloping forehead. They had a raised strip of bone across the lower forehead called a browridge. The Neandertal jaw was large, but Neandertals did not have a chin.

Explanation
The center of a bone is filled with a material called bone marrow. Part of the bone marrow makes the cells that give your blood its red color.