Inventions I studied and how they help the Earth
#1. Pencils where made in 1876 and where made by a man. Now pencils are still made in his name. Pencils were made with some kind of powder mixed with water. Pencil’s help the Earth by help writing letters to warn or help someone. In 1876, a man named Cameron R. Wells, made the pencil because he was bored one day and “poof” there was the pencil.
#2. Doctors use thing tool to listen to heart beats. The tool is called a stethosope. The stethosope help many doctors in many states and many countries. The story of the stethosope: One day a fine doctor was walking down the street when he stoped and looked at 2 little girl with 2 tied with a string and where talking to the other. Then a hand grabed the doctor and brought him to a woman with a heart failer. The doctor did not know wht to do because he could not hear her heart even if he put he’s ear to her chest, so he did what the little girls did and tied a string to 2 cans. And he was aboul to hear her heart.
#3. Tunnels where made in 1700 and trains where the first to go trough the tunnels. Tunnels can go for miles. The first tunnel was made by Ralph Dodd, one day he could not get home because a steep hill was in front him and 2 other men where with him, so they found old shovels and started to dig and it was 3 and a half hour before they made to the other side. So years later more and more tunnels where made. Tunnels where made for care or trucks so that way they can get to their places faster.
#4. The first paved roads where made in 1500. The paved road was made of selicone. The paved roads help vans, cars, trucks, ect. A French enginer made a the paved roads because he had a drive way that was made of dirt and his kids had bike and had a hard time. So he made the first paved drive way. So years later more and more paved roads where made. The selicone had to dry for a couple of hour in the sun.
Supergirl 