The graph below shows the average number of sunspots seen between 1610 and 2009. Based on the graph, which of these conclusions is most likely correct about the period between 1950 and 1980? (1 point)

A. It was a period of abnormally cold climate.

B. It was a period of abnormally hot climate.

C. All the rivers on Earth froze into ice.

D. All places on Earth experienced severe rainfall.

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f