1. Some conjunctions tell where, when, why, how, or under what conditions. Complex Sentences! Complex Sentences! ONLY put a comma in between the sentences if you use them at the beginning of a sentence- after, although, as, because, before, if, since, so that, until, when, whether and while

2. function (n)  work or action One of the major functions of trees is to provide oxygen to humans and other living forms as they transform carbon dioxide into oxygen.

3. Trees in the rainforest adjust their height so that they can receive more sunlight. adjust (v)  change to make things work or fit

4. disaster (n)  events that cause much damage or suffering Natural disasters not only ruin houses but they also take away lives of many people.

5. environment (n)  surrounding conditions The of Yosemite National Park is peaceful and shady although it can be quite eerie at night. The environment of Yosemite National Park is peaceful and shady although it can be quite eerie at night.

6. mission (n )  a special job or task that someone is given to The astronauts will not give up their mission until they discover life on other planets.

7. maze (n)   network of paths through which it is hard to find one’s way Although it was quite confusing and difficult, the corn maze was a lot of fun.

8. zone (n)  region or area Please turn off your cell phone because you are in the no cell-phone zone on the train.

9. gravity (n)  natural force that causes objects to fall toward the center of Earth Sir Issac Newton discovered the law of gravity when he got hit by an apple under an apple tree.