Wednesday, November 26, 2008
Wednesday, November 19, 2008
6th Grade Science Test Study Guide for Chapter 2. TEST IS FRIDAY!
SCIENCE STUDY GUIDE
TEST 11/21/08
1. What is the difference between endothermic and exothermic reactions?
They are both chemical reactions. Endothermic - Absorbs energy from the surroundings. Exothermic - Releases energy into the surroundings.
2. What molecules make up water AND which one is explosive?
Hydrogen and oxygen make up water and hydrogen is explosive.
3. _______________ is the ability of a substance to go through a chemical change.
Reactivity
4. Substances with ___________________ do not go through chemical changes very easily.
stability
5. What is the ability to burn?
A. stability
B. chemical properties
C. reactivity
D. combustibility
Answer: D
6. A ______________________________ is an exothermic reaction in which a substance combines with oxygen.
combustion reaction
7. In a _______________________________, a substance is broken down in simpler substances.
decomposition reaction
8. Ionic compounds can go through double __________________________, in which they exchange ions with each other.
replacement reactions
9. Modern books are printed on paper in which acid has been neutralized with what?
Modern books are printed on paper in which acid has been neutralized with bases.
10. The original Declaration of Independence is stored in pure helium
because helium is a ___________________________.
nobel gas
11. What chemicals prevent oxidation?
The chemicals that prevent oxidation are antioxidants.
12. What herbs contain natural antioxidants?
A. Sage
B. Clove
C. Rosemary
D. All of the above
Answer: D
13. Freeze drying preserves food by rapidly removing all traces of:
A. Chemicals
B. Water
C. Bacteria
D. Viruses
Answer: B
14. Everything that is matter has different _________________ change.
physical
15. The ____________________________ of a substance determines which physical changes they can undergo.
physical properties
16. What is mass?
A. The feeling
B. The color
C. Weight
D. All of the above
Answer: C
17. _____________________________ is the ability of a substance to be pulled into thin threads without breaking.
Ductility
18. ____________________________ is how the surface of a substance feels.
Texture
19. Does gold have ductility? Why or why not?
Gold does have ductility because it can be pulled into thin strands without breaking.
20. What is the definition of density?
Density is the amount of mass that fits in a given volume.
21. What is the definition of buoyancy?
Buoyancy is the ability to float in liquid or rise in a gas.
22. What are some of the physical properties of a physical change?
A. Number of quarts
B. Shape
C. Size
D. All of the above
Answer: D
23. What might happen in a physical change? Explain or give an example.
In a physical change, the molecules and atoms that make up a substance stay the same.
An example would be a crumpled piece of paper.
24. Name the two reasons gold is used for jewelry. Explain why.
Gold is highly ductile, so it can stretch into strands to form jewelry. Also, gold is highly malleable so it can bend easily to form jewelry.
25. Copper is used for:
A. Jewelry
B. Money
C. Wires
D. All of the above
Answer: D
26. Granite is made up of _____________________,
______________________, and __________________________.
grains of quart, feldspar, and mica
27. Most materials in nature are not
_____________________________.
pure substances
28. If you look closely at a piece of granite, you will see it is also a
_____________________________________.
mixture
29. What are mixtures? Give an example of a mixture.
Mixtures are combinations of two or more pure substances that are not chemically combined with each other. An example of a mixture is cereal or a granola bar.
30. Which seems to be more convenient to separate mixtures, physically or chemically?
Although mixtures can be seperated both physically and chemically, it is easier to separate mixtures chemically.
31. True or False. Substances in a mixture that don’t have different densities separate on their own.
Answer: False
32. An example of a mixture that is not spread evenly is:
A. Cereal
B. Confetti
C. Fireworks
D. All of the above
Answer: D
33. True or False. Gasses can also dissolve in liquids to form solutions.
Answer: True
34. The bubbles in a soft drink are carbon dioxide gas leaving the:
A. Oxygen
B. Hydrogen
C. Solution
D. Calcium
Answer: C
35. True or False. Solids can form some solutions.
Answer: True
36. True or False. Pure silver and pure gold metals are stronger than silver and gold alloys.
Answer: False
37. How do colloids differ from suspensions?
A suspension is a mixture that contains particles that are large enough to be seen. Collids are suspensions that are not easily filtered.
38. If you let orange juice or chocolate milk sit, will the solids in the mixture gradually settle to the bottom of the glass? Explain why.
Yes, the solids in the mixtures of orange juice and chocolate milk will gradually settle to the bottom of the glass because the solids are more dense.
TEST 11/21/08
1. What is the difference between endothermic and exothermic reactions?
They are both chemical reactions. Endothermic - Absorbs energy from the surroundings. Exothermic - Releases energy into the surroundings.
2. What molecules make up water AND which one is explosive?
Hydrogen and oxygen make up water and hydrogen is explosive.
3. _______________ is the ability of a substance to go through a chemical change.
Reactivity
4. Substances with ___________________ do not go through chemical changes very easily.
stability
5. What is the ability to burn?
A. stability
B. chemical properties
C. reactivity
D. combustibility
Answer: D
6. A ______________________________ is an exothermic reaction in which a substance combines with oxygen.
combustion reaction
7. In a _______________________________, a substance is broken down in simpler substances.
decomposition reaction
8. Ionic compounds can go through double __________________________, in which they exchange ions with each other.
replacement reactions
9. Modern books are printed on paper in which acid has been neutralized with what?
Modern books are printed on paper in which acid has been neutralized with bases.
10. The original Declaration of Independence is stored in pure helium
because helium is a ___________________________.
nobel gas
11. What chemicals prevent oxidation?
The chemicals that prevent oxidation are antioxidants.
12. What herbs contain natural antioxidants?
A. Sage
B. Clove
C. Rosemary
D. All of the above
Answer: D
13. Freeze drying preserves food by rapidly removing all traces of:
A. Chemicals
B. Water
C. Bacteria
D. Viruses
Answer: B
14. Everything that is matter has different _________________ change.
physical
15. The ____________________________ of a substance determines which physical changes they can undergo.
physical properties
16. What is mass?
A. The feeling
B. The color
C. Weight
D. All of the above
Answer: C
17. _____________________________ is the ability of a substance to be pulled into thin threads without breaking.
Ductility
18. ____________________________ is how the surface of a substance feels.
Texture
19. Does gold have ductility? Why or why not?
Gold does have ductility because it can be pulled into thin strands without breaking.
20. What is the definition of density?
Density is the amount of mass that fits in a given volume.
21. What is the definition of buoyancy?
Buoyancy is the ability to float in liquid or rise in a gas.
22. What are some of the physical properties of a physical change?
A. Number of quarts
B. Shape
C. Size
D. All of the above
Answer: D
23. What might happen in a physical change? Explain or give an example.
In a physical change, the molecules and atoms that make up a substance stay the same.
An example would be a crumpled piece of paper.
24. Name the two reasons gold is used for jewelry. Explain why.
Gold is highly ductile, so it can stretch into strands to form jewelry. Also, gold is highly malleable so it can bend easily to form jewelry.
25. Copper is used for:
A. Jewelry
B. Money
C. Wires
D. All of the above
Answer: D
26. Granite is made up of _____________________,
______________________, and __________________________.
grains of quart, feldspar, and mica
27. Most materials in nature are not
_____________________________.
pure substances
28. If you look closely at a piece of granite, you will see it is also a
_____________________________________.
mixture
29. What are mixtures? Give an example of a mixture.
Mixtures are combinations of two or more pure substances that are not chemically combined with each other. An example of a mixture is cereal or a granola bar.
30. Which seems to be more convenient to separate mixtures, physically or chemically?
Although mixtures can be seperated both physically and chemically, it is easier to separate mixtures chemically.
31. True or False. Substances in a mixture that don’t have different densities separate on their own.
Answer: False
32. An example of a mixture that is not spread evenly is:
A. Cereal
B. Confetti
C. Fireworks
D. All of the above
Answer: D
33. True or False. Gasses can also dissolve in liquids to form solutions.
Answer: True
34. The bubbles in a soft drink are carbon dioxide gas leaving the:
A. Oxygen
B. Hydrogen
C. Solution
D. Calcium
Answer: C
35. True or False. Solids can form some solutions.
Answer: True
36. True or False. Pure silver and pure gold metals are stronger than silver and gold alloys.
Answer: False
37. How do colloids differ from suspensions?
A suspension is a mixture that contains particles that are large enough to be seen. Collids are suspensions that are not easily filtered.
38. If you let orange juice or chocolate milk sit, will the solids in the mixture gradually settle to the bottom of the glass? Explain why.
Yes, the solids in the mixtures of orange juice and chocolate milk will gradually settle to the bottom of the glass because the solids are more dense.
Sunday, November 9, 2008
Cool Science Website and BAY SAIL Field Trip Info.
Make sure you check out the cool science website link on the right. You can watch many, many science experiment videos here. What fun! Mrs. Chaffin's class was sent home with a Bay Sail note. Please make sure you have this note. If you did not get one, please make sure to email me. My email address is on my weekly newsletter or tell your child to get another one to take home. This is an important note to inform parents about the expenses involved in this field trip. If you would like to learn more about this field trip, please visit http://www.baysailbaycity.org/ This site will fill you in on all the fun we will have! PLEASE, PLEASE, PLEASE, if you know that your child will not be going on this field trip for ANY reason, let me know now so I can fill his/her place on the trip. We have to have 35 people going to make this trip a success. Mr. Chaffin will be sending a note home for his 5th grade class. Mrs. Prill's class and Mrs. Yell's class, also be looking for a note pertaining to this field trip.
Monday, November 3, 2008
Finally, some 5th Graders!
Sage on the first day of 5th grade!
Nick on the first day of 5th grade!
Kari on the first day of 5th Grade!
Nick hard at work dissecting owl pellets!
Sage enjoying the experiment! Sunday, November 2, 2008
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