How many variables should you change in a controlled experiment?

one

two

four

as many as possible

Eating nonfood items like clay, erasers, and chalk during pregnancy is known by the medical name of

What is the best definition of a conclusion? a written description of events that occurred during an experiment an act of recognizing and noting an occurrence by using the senses a possible explanation of a scientific question based on observation

In a plant cell, where are the atp synthase complexes located?; a) thylakoid membrane only; b) plasma membrane only; c) inner mitochondrial membrane only; d) thylakoid membrane and inner mitochondrial membrane;

Given the general chemical formula X2O, to what group in the periodic table does the Period 2 element represented by X belong? A. 1 B. 16 C. 2 D. 17

Which nation was able to broker an armistice agreement between North and South Korea, ending the fighting?

Explain one way in which a hormone can prevent contraception

1) Which of the following explains why a bone in a bird's wing is homologous to a bone in a lizards leg? A) The bones in the two species provide for the same type of motion.

Do plants provide an important contribution in shapingof the environment?

Two people are standing together in an elevator, but they do not speak to each other or look each other in the eye. erving goffman called this type of interaction

A person without a spleen a) cannot survive. B) cannot synthesize red blood cells. C) cannot synthesize white blood cells. D) may need antibiotic therapy. E) may need blood transfusions to prevent anemia.