1. Semester 1 Week 18 ( December 5-9, 2016)
Learning Target
By the end of class, I will be able to
answering questions from the power point by answering correctly and completely and discuss with my partner
Essential Question
What do you need to do this week in order to show proficiency in you finals? Explain
Agenda
Review NGSS 1-7
- powerpoint
Canvas
- turn in all missing work
Homework
All missing work on CANVAS were already due – you were given more than enough time to have it completed and turn it in.

3. What is the atomic number for the element below?

4. What is the atomic mass for the element below?

5. Which of the following could be an atom?
0 protons, 2 neutrons, and 0 electrons 2 protons, 2 neutrons, and 0 electrons 2 protons, 2 neutrons, and 2 electrons 2 protons, 0 neutrons, and 0 electrons

6. Energetic particles that move in all directions around the nucleus of an atom are called:

7. Which of the following types of particle found in an atom has no charge?

8. The most massive particles inside an atom are:

9. The element shown has a mass number of 40
The element shown has a mass number of 40. How many protons, electrons, and neutrons are in the element shown?

10. In a chemical reaction:
The bonds in the reactants are broken.
In the product, the bonds are rearranged to make a new substance whose properties are different than those in the reactants.

11. The products in a chemical reaction always:
have different properties than the reactants.

12. Which picture represents the gaseous state of matter?

13. What is happening to the motion of the particles as they change states from 1 to 3?

14. Law of Conservation of Mass
Friendly Definition
Pictograph
Wordwork
7-up Sentence
the mass of the reactants equals the mass of the products
Reactant =
Product
Law of Conservation of Mass
The amount of “particles” at the beginning of a reaction is equal to the amount of “particles” at the end of the reaction.
Melissa explained that the “Law of Conservation of Mass” says that the mass of the reactants equals the mass of the products.

15. Law of Conservation of Energy
Friendly Definition
Pictograph
Wordwork
7-up Sentence
energy can be changed from one form into another but cannot be created or destroyed.
Law of Conservation of Energy
Synonyms for conservation:
preserving
storage
Because of the Law of Conservation of Energy, a swing will stop because the energy of motion is changed into heat energy.

16. In a chemical reaction, the total mass of the reactants is:
_________ to the total mass of the products.
This is called the law of ____________________

17. Which of the chemical equations is balanced?
2H2 + 2O2  2H2O 2H2 + O2  2H2O H2 + 2O2  2H2O H- O-  H- O-

18. Which of the following chemical equations is balanced?
CH4 + 2O2  CO2 + H2O 2Na + Cl2  NaCl 2KNO3  2KNO2 + O2

19. Describe the difference between a physical change and a chemical change?
Physical Change is _______________________________
_________________________________________________
Chemical Change is ______________________________
_________________________________________________

21. Fireworks release heat as an exothermic reaction.
Friendly Definition
Pictograph
Wordwork
7-up Sentence
- a reaction that releases more energy than it absorbs. It might feel hot.
exothermic reaction
Fireworks release heat as an exothermic reaction.

22. Friendly Definition
Pictograph
Wordwork
7-up Sentence
A reaction that uses more energy than it releases (absorbs). It might feel cold.
endothermic reaction
Jorge felt the temperature decrease in the cold pack because of the endothermic reaction which took place.

23. chemical reaction occurred?
The initial temperature of a chemical reaction was 25 oC
Later the temperature of the reaction was 38 oC
What type of
chemical reaction occurred?

24. What type of chemical reaction occurred?
When you use an instant heat pack, water mixes with chemicals and the pack get very warm.
What type of chemical reaction occurred?

25. According to the graph below, what temperature will result in the highest rate of photosynthesis?

26. (You did this in the Gizmo)
You have an Elodea plant in a test tube and you have the indicator (bromothymol blue) in the tube. You watch it for several days.
(You did this in the Gizmo)
At what time of day will the oxygen level in the tube be the lowest? Why?
Just before sunrise WHY? While it is daylight, the Elodea will produce oxygen by photosynthesis. Once the sun goes down, photosynthesis will stop and the Elodea will use up oxygen until the sun comes up in the morning. The oxygen level in the tube will fall all night long, reaching its lowest level just before sunrise. Once the sun comes up, the oxygen levels will begin to rise again as the Elodea begins to produce oxygen again.

28. Plants use which of the following types of matter to do photosynthesis?

29. Animals use which of the following types of matter?

30. Looking at the illustration above, in what ways are plants and animals dependent on one another?

31. The food created by plants then eaten by animals is processed by what cell organelle?

32. We perform aerobic respiration through activities like walking, running, dancing and playing soccer. When we do aerobic respiration, our cells require oxygen to break down the sugar molecules into useable energy. Which organelle in the cell is responsible for this breakdown of sugar into energy?

33. What is the independent variable for the graph below?

34. The plant growth graph shows what type of relationship?

35. In a direct relationship:
as one variable increases, the other increases
when one variable increases, the other decreases

36. A scientist heated an expandable rubber container
A scientist heated an expandable rubber container. As the container was heated, the gas inside expanded. The scientist measured the container’s size at every temperature increase of 10 degrees and then graphed the data as shown. What would be the size of the container if the temperature were 60°C?

37. What would be the size of the container if the temperature were 60°C?

38. Daniel repeated an experiment to test his hypothesis three times
Daniel repeated an experiment to test his hypothesis three times. None of the trials supported his hypothesis.
What should he do?

39. A student hypothesizes that water containing salt freezes at a higher temperature than water without salt. In an experiment to test this hypothesis, what is the dependent variable?

40. How do the water molecules change?
A block of ice melts into liquid water.
How do the water molecules change?

41. a. a physical change b. a chemical change
When water melts, it undergoes:
a. a physical change
b. a chemical change

42. Study Guide
for EOC exam w Ms. Corral