Mary and ron are discussing the properties of water. mary says that when water freezes, it becomes less dense than liquid water. ron says it becomes more dense. who is correct and why?

ron, because ice molecules are smaller than liquid water molecules

ron because ice sinks in liquid water

mary, because ice molecules are larger than liquid water molecules

mary, because lakes and ponds freeze at the bottom first

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.

Select the star life cycle that is accurate