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Before the idea of the atom was fully developed, a scientist thought that the electrons were stuck on the atom. What analogy could
he have used to describe this situation?
A)
chips in a cookie
B)
the yolk of a boiled egg
C)
seeds in the core of an apple
D)
sugar dissolved in a glass of tea
Nature of Science

Identify the examples in which sam interacts only with natural resources

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.

Why are current extinctions of concern to enviromentalists?