Mary works for NASA she is designing a new escape pod. The escape pod must weigh no more than 1 ton, so that it can be launched into space. It must be big enough for four people. It must be strong enough to fall from 500 meters without breaking. It must not be made out of any magnetic metal. It must operate on solar power. It must withstand heat of 1000 degrees Celsius without melting. What are the criteria Mary was given? What are the constraints? The answers can overlap. Mary makes a little model of her idea to test. 3. What is the word for a little model? 3. After testing different materials Mary decides to use a ceramic for the hull instead of a non magnetic metal. The ceramic is heavier but more heat resistant. Mary’s choice is a ? 4. How are cars today different from cars made 80 years ago? 5. Why are they different? 6. Describe one tradeoff that occurred in car design? 7. Pick any technology and describe both positive and negative elements to the technology. Write at least 4 sentences. 8. What is iterative testing?

1The criteria:  It must be big enough for four people, it must be strong enough to fall from 500 meters without breaking, it must operate on solar power, and it must withstand heat of 1000 degrees.

2The constraints:  The escape pod must weigh no more than 1 ton and It must not be made out of any magnetic metal.

3A small model is called a scale model.

4Her choice is a Decision

5Cars are different today than they were 8 years ago in a sense that they are faster, more efficient, and better designed.

6They are different because of the time frame they were built in. Scientific discoveries advanced technology and the understanding of physics.

7One tradeoff in car design was that instead of being made of heavier materials that could withstand harsh crashes, in order to make the cars faster, they were designed with lighter more bendable materials which in turn made the cars faster.

8Cell phones are an example of something positive and negative. They are useful for communicating and are connections to the worlds largest information source. Unfortunately, cell phones can cause eyes to deteriorate, as well as disfiguring posture. But overall, the good side outweighs the bad.

9Iterative testing is a process of basing tests on insights gleaned from previous tests to make changes gradually and that are evidence based. Iterative testing is an important component of conversion rate optimisation. It allows a site to evolve over time with small steps rather than a large redesign.

Explanation:

The constraints are what keep you from doing anything with the task that your given, but the criteria are the requirements needed for the task at hand too function or happen the way it was designed to.