6. You are going to use a dropper bottle to slowly add ethanol to the test tube. Position the dropper so that the drops run down the side of the test tube. Slowly
add drops until the test tube is half full. The ethanol should form a separate layer
above the filtered solution. Record what you observe.

7. Place the tip of the stirring rod at the point where the two layers meet as shown in
Figure 2. As you gently twirl the rod, bend down so you can observe what is
happening at eye level. Record what you observe.

8. After you dispose of the materials as instructed by your teacher, wash your hands
thoroughly with soap and warm water.

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.