The graph below shows the averaged sunspots from 1610 to 2007. based on the graph, which of these conclusions is correct? (2 points) question 18 options: 1) some of the previously warm regions became colder from 1650 to 1700. 2) some of the previously cold regions became warmer from 1600 to 1700. 3) some of the previously warm regions became warmer from 1610 to 1700. 4) some of the previously cold regions became colder from 1900 to 1950.

This line graph compares the growth of plants that were kept in the sun for different amounts of time.a)  on day 7, the plants kept in the sun for 3 hours were how tall? b)  on day 7, the plants kept in the sun for 6 hours were how tall? c)    on day 10, the plants kept in the sun for 9 hours were how tall? d)  on day 11, the plant that was grown with 1 hour of sunlight was how tall? e)  based on the graph, the plant grows best in what amount of sunlight?

The polymer used for the nonstick surface of cooking utensils is 24.0%c and 76%f by mass. what is the empirical formula of this polymer?

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.