1. The Top of the World: Climbing Mount Everest By: Steve Jenkins Lesson 28 Vocabulary

2. A mountain’s summit is its very top
It took him several weeks to reach the summit of Mount Everest since it is over 29,000 feet.

3. accustomed –
If you are accustomed to something, you are used to it because it has been a regular part of your life
I am accustomed to getting up every day by 6am because it is what I have been doing for the past 13 years.

4. A streamlined design is efficient and has no unneeded parts
The new JR500 train from Japan is ultra-streamlined since it runs on a speed of 270mph.

5. Something that is essential is absolutely necessary
Drinking water and eating fruits and vegetables is essential to living a healthy lifestyle.

6. Something that is secure is safe and not likely to give way
The couples important papers are secure in a locked safe that is kept in the closet.

7. acclimate –
If you acclimate to something, you adjust to a new condition or environment
A lizard can acclimate to its surroundings by changing color and blending in with their surroundings.