1. (blank) are the basic units of structure and function in living things.
2. a (blank) is a group of similar cells that perform a specific function in an organism.
3. (blank) are nerve cells that carry response information to muscles and organs.
4. carbon dioxide and (blank) are outputs of cellular respiration.
5. (blank) is essential to living things because many of the chemical reactions that occur in living things require it.
6. scientists did not discover the cell until the (blank) was invented because cells are too small to see without one.
cells, tissue, organ, osmosis, tropism, nucleic acids, organisms, motor neurons, enzymes, microscope, phyla, respiration, water, diffusion, energy, sensory neurons.

7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation. 8. when a 2.5 mol of sugar (c12h22o11) are added to a certain amount of water the boiling point is raised by 1 celsius degree. if 2.5 mol of aluminum nitrate is added to the same amount of water, by how much will the boiling point be changed? show all calculations leading to your answer or use 3 – 4 sentences to explain your answer. 9. if 5.40 kcal of heat is added to 1.00 kg of water at 100⁰c, how much steam at 100⁰c is produced? show all calculations leading to an answer. 10. the freezing of water at 0⁰c can be represented as follows: h2o (l) ↔ h2o(s) the density of liquid water is 1.00 g/cm3. the density of ice is 0.92 g/cm3. in 3 – 4 sentences explain why applying pressure causes ice to melt.

Which statement best describes what happens when molecular compounds melt

The organs inside the body and how they function together