When building a spacecraft what are the 3 things NASA is most concerned about?

If the ship is strong enough to support the launch. If the ship can withstand high pressure and temperature rates. If the material is resistant and light at the same time.

Explanation:

When a spacecraft is built, many tests must be carried out over the years to prove that the spacecraft has the ability to launch into space and fulfill its mission efficiently. In addition to supporting the launch, these ships need to be built in a way that will withstand space conditions that are very different from terrestrial conditions.

For this reason, there is a concern if the ship can withstand extreme situations of temperature, pressure, gravity, weight, among others. In summary, we can say that three of the biggest concerns that NASA has in building spaceships are:

If the ship is strong enough to support the launch. If the ship can withstand high pressure and temperature rates. If the material is resistant and light at the same time.

She will need to learn out how to quantitatively measure mold growth to measure the dependent variable.

Explanation:

In any experiment there are two types of variables, dependent and independent. Independent variable is controlled by the experimenter and its value is not affected by the experiment. Dependent variable's value depends on the independent variable and is affected by the experiment.

Here, the experiment is trying to find out the way mold growth is affected by the type of bread. Hence the type of bread is the independent variable and the mold growth is dependent variable. To measure the dependent variable correctly the researcher will have to learn to quantitatively measure the mold growth. Quantitative analysis of mold growth will give an accurate measurement of dependent variable.