As scientists have learned more about atoms models of atoms, models of atoms have changed. One of the first atomic models was a solid ball, such as marble. What are two limitations of using a marble to model an atom?

A) The model is much harder to see than a real atom.
B) The model is not made of commonly available materials or objects.
C) The model does not move or behave like a real atom.
D) The model does not show the true size of an atom.

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey

Which of the following molecules can be broken down into simple sugars? a. nucleic acid b. protein c. lipid d. carbohydrate

What are the three different shapes or structures shapes or structure of carbon-based molecules?