Earth's interior is made of several different layers. Which problem does this model of Earth solve? A. Earth's interior layers formed too long ago to observe directly B. Finding out what makes up Earth's layers requires special tools. C. Earth's interior is very hot and too dangerous to study directly. D. Taking a picture of Earth's interior is impossible.

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables

Veronica and her little sister, monique, are playing on a seesaw. if veronica weighs 75 pounds, and monique weighs 60 pounds, which statement is true?

What is a food chain? a.different animals located in different communities b. energy transferred from the sun to plants and then to a series of living things c. rows of crops, such as lettuce, in a field d.animals using one another as food for energy and growth