How do you really know when something is alive? What's your test for deciding if something is alive? How would explain your definition of life to a child?

How thin is earths crust

What is the basic structure of a dna molecule

How do the base pairs match up?

What causes clouds to reflect a portion of sunlight back to space? a characteristic known as albedo temperature differences between the land and the atmosphere the amount of oxygen in the atmosphere evaporation from the land

WhAt do you use a bar graph for

Why does air at 75% relative humidity and 30°C make your skin feel stickier than air at 75% relative humidity at 10°C? A. Warm air rises while cold air falls. B. The warmer air contains less water vapor per unit of volume. C.

When the two solutions are mixed, a clear solution with white powder at the bottom results., What has caused this change?

What receptor type is exemplified opening a channel to get sodium into the cell

What is the total amount of tissue of all organisms in a food chain called?

If an entire stack of rock layers has been folded, which of these would have occurred most recently?