Which is an example of a chemical change?
A: a nail rusting in water

In May 2007, wildfires burned more than 350 square miles of habitat in Florida and Georgia. Intense fires like this one can temporarily remove nitrogen, phosphorus, and potassium in area soil. What most likely happens in the burned areas until organic decay replenishes the lost nutrients?
A: The carrying capacity of the soil for plant growth is reduced.

Meteorologists categorize hurricanes based on the Saffir-Simpson scale. The scale measures the intensity and destructive potential of hurricanes. Which factor has the most significant effect on the strength of a hurricane?
A: the temperature of the water below the hurricane

When the cells in an organism divide and reproduce, the organism can grow. Which cell organelle contains the genetic material for reproduction?
A:
the nucleus