TABLE 3.

Means, standard deviations, and factor analysis (principal component analysis with varimax rotation) of correct responses to science questions

Items	M (SD)	Component 1	Component 2
Why do some birds fly south for the winter?	0.80 (0.40)	0.58	0.14
How do fish breathe underwater?	0.74 (0.44)	0.65
Why do polar bears have white fur?	0.67 (0.47)	0.53
Why do dogs pant?	0.47 (0.50)	0.64	0.33
How do bats find their food in the dark?	0.42 (0.50)	0.57	0.46
How do tadpoles turn into frogs?	0.39 (0.49)	0.33	0.63
How do bees make honey?	0.17 (0.38)		0.77
Why are some birds' eggs white and others are different colors?	0.15 (0.36)	0.16	0.62

Factor loadings over 0.40 appear in bold.