Which of the following is NOT true about mixtures? O Mixtures can be physically separated into individual parts.
O Mixtures are made by mixing substances together.
O Mixtures have specific properties.
O Mixtures don't have specific properties.

Many organizations release indexes used to measure the development of the world's countries. as we learned in this lesson, these indexes measure many factors, from life expectancy to happiness. in your opinion, what are the three most important factors we can use to determine how developed a country might be? explain your answers in a few sentences.