Which of the following produces a chemical change?

A. Liquid wax hardens into the shape of a candle

B. A piece of iron is ground into iron powder

C. Ice melts to form water

D. Paper burns to form carbon dioxide and water

Which is the correct order of primary succession?

Why do the paleoanthropologists believe that the bones may have been intentionally placed in the cave?

How are most nutrients absorbed through the mucosa of the intestinal villa? A. facilitated diffusion B. bulk flow C. active transport driven directly or indirectly by metabolic energy D. simple diffusion

When salespeople relate the initial sales resistance and subsequent acceptance and positive outcome experienced by a previous customer in an effort overcome sales resistance with a current customer, they are using which method of responding to

What can fossils tell us about Geologic history?

Do plant cells have mitochondria? yes or no

Antarctica is covered in ice. which of the following would you expect to be true of Antarctica? A. The ice is immune to insolation B. The ice has no heat capacity C. The ice has a high albedo D. The ice reflects no radiation

Mateo eats his breakfast and his gi tract will now begin the process of digesting and absorbing the nutrients from this meal. what is the order in which each of the organs of the gi tract will work to achieve this process?

Diffusion is the spontaneous movement of a substance from an area of what

Which type of mutation always creates a stop codon?