Question of the Day

1. Knowing the ultimate purpose of each activity, which of the following would MOST LIKELY be a part of a scientific investigation?

A. Traveling to the rain forestB. Extracting DNA samples from eight varieties

of rain forest beetlesC. Moving to the rain forest to see if you can

survive there.D. Listening to the music of native Indians.• SCSh1,3,6,8

Q.O.D.

2. Which of the following is a technological design investigation?

A. Buying a go-cartB. Installing a new bumperC. Finding ways to make the go-cart fasterD. Painting the go-cart

SCSh1,3,6,8

Q.O.D.3.Jeremy decides to cook some pasta noodles.

He notices that the directions say to add salt to the water before bringing the water to a boil. The next day, Jeremy asks his science teacher, Ms. Jackson, a question: "How does adding salt affect the boiling temperature of water?" Of course, Ms. Jackson asks Jeremy to plan and conduct an experiment to find the answer.

• The following questions are based on the experiment Jeremy does to find an answer.

3. Jeremy writes an hypothesis before beginning his experiment. Which of the following is the hypothesis he wrote?

A. Pasta manufacturers and salt companies have signed a business deal.

B. Adding salt to pasta water makes the pasta taste better.

C. Adding salt to pasta water will cause the water to boil at a higher temperature.

D. Certain types of salts will not dissolve in boiling water.

Q.O.D.

Q.O.D.

4.What would be a likely control condition for Jeremy's experiment?

A. One quart of boiling water with salt addedB. One quart of boiling water with no salt added

C. One quart of room temperature water with

salt added D. One quart of room temperature water with

no salt added

QOD

5. Draw your own version of this graph

Q.O.D.5.The graph summarizes Jeremy's results. What

conclusion can be made from these results?A. Adding salt to the water causes the water to

boil at a higher temperature.B. Adding salt to the water causes the water to

boil at a lower temperature. C. Adding salt to the water has no effect on the

temperature of the boiling water. D. There is not enough information for a valid

conclusion.

Q.O.D.

6.Based on Jeremy's findings, what would be a benefit of adding salt to pasta water?

A. There is no obvious benefit of adding salt to pasta water.

B. Salt clings to the cooking pot and allows the pot to hold more heat.

C. Adding salt to the water chemically breaks down the pasta to make it softer.

D. When you add salt to pasta water, the water can get hotter and pasta is cooked faster.

Q.O.D.

7a. A control variable is:A. rarely used in scientific experiments. B. a variable that stays the same throughout an

experiment. C. a variable that is changed in an experiment.D. the largest, most powerful variable in an

experiment. 7b. Most often, an experiment involving the

scientific method begins with a:A. hypothesis. B. observation. C. procedure.

D. question.•

Q.O.D.

8. A cart is rolling down a ramp. If the angle of the ramp is increased to make the ramp steeper, the cart will:

A. accelerate slower. B. accelerate at the same rate. C. accelerate faster. D. move at a constant velocity.SPS.6

QOD9. Cartridges used to fire paint balls are filled

with carbon dioxide (CO2) gas. Each time a paint ball is fired, some CO2 gas escapes. The volume of the cartridge is rigid and does not change. Deyon buys a new CO2 cartridge. Chris has the same cartridge, but his cartridge has been used to fire several paint balls. Which of the following is true of the cartridges assuming both cartridges are at the same temperature?

Answers next---

9. CONT’D--A. The pressure in Deyon’s cartridge is greater

than the pressure in Chris’s B. The pressure in Deyon’s cartridge is less than

the pressure in Chris’s cartridge.C. The pressure in Deyon’s cartridge is equal to

the pressure in Chris’ cartridge.D. No relationship can be determined from the

given information.SPS5

Q.O.D.

10. What state of matter has a definite volume but no definite shape?

A. solid B. liquid C. gas D. all states of matter

SPS 8 a-d

Q.O.D.11. What state of matter can expand or contract

depending on the volume of its container?a. solid b. liquidc. gasd. none of the states of matter SPS 8 a-d

Q.O.D.12. The kinetic energy of a substance is greatest

in which state?A. solidB. liquidC. gasD. each state has equal energy

SPS 8 a-d

Q.O.D.

13. CALCULATE THE DENSITY

D= m (mass) V (volume)1. A block of stone material with a mass of 48 grams and a volume of 12cm3. 2. A volume of liquid water with a mass of 12 grams and a volume of 12cm3.

Q.O.D.14. Quamine uses a vice to squeeze 3

containers. Which turns out to be the most compressible?

A. The solid phase containerB. The liquid phase containerC. The gas phase containerD. The temperature must be known to answer

this question.SPS 2,5,7

Q.O.D.15. You heat 50mL of salt water on a Bunsen

burner until all the water has evaporated. NaCl crystals are left behind. Which statement describes the result of this action correctly?

A. The water has undergone a chemical change.B. The salt has undergone a chemical change.C. The salt and water have decomposed.D. The salt and water have undergone a physical

change.SPS5, 2b

Q.O.D.

16. Select the freezing point of water on the Celsius Temperature scale.

A. -273.15 C. B. O C.C. 32 C.D. 273.15 C. SPS 4

Q.O.D.The chemical formula for glucose is C6H12O6.

17. How many atoms of carbon make up one molecule of glucose?

A. 1 B. 3 C. 6 D. 12

18. How many atoms of hydrogen? A. 1 B. 3 C. 6 D. 12

SPS5,2b

Q.O.D.

19. Which of the following is an example of kinetic energy?

A. a baseball in a lockerB. a baseball in the catchers mittC. a baseball flying in the airD. a baseball stuck in a house gutterSPS8 a-d

Q.O. D.

20. Which of the following can be separated by filtering?

A. a solutionB. compoundC. an elementD. a heterogenous mixtureSPS5, 2b

Q.O.D.

21. Which of the following combinations would result in a substance that is chemically different than its components?

A. Carbon and oxygen form carbon dioxideB. Sugar and water form a sugar-water solution.C. Copper and tin form bronzeD. Oxygen and nitrogen form the air that we

breathe.

Q.O.D.

22. A good hypothesis:A. is one that can be tested by experiment. B. can be an educated guess predicting the

outcome of an experiment. C. can only be formed when you know a little

about what is going to happen. D. may be described by all of the above.

Question of the Day

23. Which of the following would result in a chemical change?

A. BoilingB. CuttingC. DissolvingD. BurningSPS5,2b

Q.O.D.

24. What is a physical combination of two or more substances called?

A. an elementB. a compoundC. a mixture D. an isotopeSPS5, 2b

Q.O.D25. Which of the following is a

heterogeneous mixture?a. Salt water b. carbon dioxide CO2

c. Bronzed. Vegetable soup

Q.O.D.

26. When might a substance absorb heat but not change temperature?

A. when it is in its solid stateB. when it is changing from one physical state to

anotherC. when it is in its gaseous stateD. under no circumstances will a substance

absorb heat but not change temperature.SPS 8 a-d

27. Identify the following substances as an element (E), compound (C), or mixture (M).

carbon___ water___ carbon dioxide___ blood___milk___ sand & sugar _______calcium ____ chicken noodle soup _____SPS1,2,5

Q.O.D.

Q.O.D.

28. Calculate the speed of the object from the position vs. time graph shown below.

A.0.5 m/sec B. 0.75 m/sec C. 2 m/sec D. 3 m/sec

Q.O.D.

29. Newton's first law of motion is also known as:

A. the law of universal gravitation. B. the law of force pairs. C. the law of unbalanced forces. D. the law of inertia.

SPS6

Q.O.D.

30. When compared to a high viscosity liquid, a liquid with a low viscosity:

A. must have a lower volume. B. is easier to pour. C. must have a higher density. D. takes longer to pour from one container to

another.SPS4

Q.O.D.

A. Point 1 B. Point 2 C. Point 3 D. Point 4

31. At which of the following points on the graph is the speed the greatest?

Q.O.D.

32. Rust is an example ofA. OxidationB. A chemical changeC. A physical changeD. Precipitation

SPS5,2b

Q.O.D.33. A rocket can fly into space because: A. when it is launched, the hot exhaust gases hit the

ground and push the rocket forward. B. the rocket pushes the exhaust gases backward, and

there is an equal and opposite reaction pushing the rocket forward.

C. when the gases are burning up, the mass of the rocket decreases, changing the amount of gravity on the rocket.

D. the launch pad pushes the rocket forward like a slingshot. SPS8

Q.O.D34. An astronaut is planning a trip to a newly-discovered

planet. According to Newton's law of universal gravitation, the astronaut's weight on the new planet will be greater than his weight on Earth if:

(A) the new planet has less mass than Earth but the same radius.

(B)the new planet has less mass than Earth and a larger radius.

(C) the new planet has more mass than Earth but the same radius.

(D) The size of the planet doesn't matter. Weight is the same everywhere in the universe. SPS8

Q.O.D.35. A book rests on a table. The force of gravity pulls

down on the book with a force of 20 newtons. What prevents the book from accelerating downward at 9.8 m/sec2?

A. The table presses back up on the book with an equal and opposite force of 20 newtons.

B. The table presses back up on the book with a force greater than 20 newtons.

C. The table and the book together are accelerating downwards at 9.8 m/sec2.

D. The inertia of the book holds it up. SPS8

Q.O.D.36. An astronaut with a mass of 100 kilograms is

floating in outer space. If the astronaut throws a 2-kg wrench at a speed of 10 meters per second, his

motion would best be described as:A. in the same direction as the wrench at a speed less

than 10 m/sec. B. in the same direction as the wrench at a speed

greater than 10 m/sec. C. in a direction opposite to the wrench at a speed less than 10 m/sec. D. in a direction opposite to the wrench at a speed

greater than 10 m/sec. SPS8

Q.O.D.37. Shadari adds liquid water to an ice tray, and places

it in the freezer. What happens?A. Thermal energy flows from the higher energy

phase(water) to the lower energy phase(cold air).B. Thermal energy flows from the higher-energy

phase(cold air) to the lower energy phase(water).C. Cold radiates from the cold air into the warm

water.D. The insulation of the ice tray keeps the

temperature from changing much. SPS7b

Q.O.D

38. Why do we have different units of time?A. for variety B. large units for small times and small units for

large times C. large units for large times and small units for

small times D. for different kinds of timersSPS8

Q.O.D.39. A marble rolls along the track below with no

friction. The sequence of positions on the track listed in order from the lowest kinetic energy to the highest kinetic energy is:

A) 1, 5, 4, 3, 6, 2 B) 1, 2, 3, 4, 5, 6C) 1, 5, 4, 2, 3, 6 D) none of the above.SPS8

Q.O.D.

40. What occurs when waves bend around corners or pass through small openings?

A. absorption B. reflection C. diffraction D. refractionSPS6

Q.O.D.

41. Which of the following is true regarding mechanical waves?

A. Mechanical waves must travel through matter

B. Mechanical waves can travel through matter and space.

C. Mechanical waves can only travel through a vacuum

D. Mechanical waves can change matter.

Q.O.D.

42. Longitudinal wavesA. have their oscillations perpendicular to the

direction they move in. B. are string vibrations. C. are water waves. D. have their oscillations in the same direction

they move in.SPS9

Q.O.D.43. Quan is cold and puts on a hoodie. In a few

minutes he feels warm. Why?A) The hoodie adds heat to Quan’s body.B) The hoodie took heat from the air around

Quan’s body.C) The hoodie slowed the heat loss from Quan’s

body.D) The hoodie increased the loss of cold from

Quan’s body.

Q.O.D.44. A steel ball is released & allowed to roll down a

ramp. Identify the statement that describes changes in potential energy (PE) and kinetic energy (KE).

A) PE & KE are both the greatest mid-way down the ramp.

B) PE & KE both remain constant.C) PE is greatest at the top. KE is greatest at the

bottom.D) PE is greatest at the bottom. KE is greatest at the

top.

Q.O.D.45. What process does the following describe: “a block of dry ice sitting on a lab bench has a

cloud of gas around it?”A) MeltingB) SublimationC) EvaporationD) Fumigation

Q.O.D.

46. X-rays are representative of what type of energy?

A) ThermalB) NuclearC) ElectromagneticD) Chemical

Q.O.D.

47. Select the electromagnetic wave with the longest wavelength.

A) Infrared radiationB) Radio wavesC) Visible light wavesD) Microwaves

Q.O.D.48. Which of the following statements about

suspensions is TRUE? A. A suspension contains particles smaller than

those of a solution. B. A suspension cannot be filtered. C. The large particles in a suspension eventually

settle to the bottom of the container. D. A suspension is a true solution.SPS6

Q.O.D.49.Which of the following block and tackle systems has the

largest mechanical advantage?

A. System A. B. System B.   C. System C. D. All three systems have the same mechanical advantage. SPS8

Q.O.D.50.Do any of the atom diagrams below

represent atoms of the same element?

A. No, they are all different elements. B. Yes, atom A and atom B are the same. C. Yes, all of the atoms are the same.D. Yes, atom A and atom C are the same.

Q.O.D.

51. Identify the following on the periodic table.A. The chemical symbol for mercuryB. The period and group of gold.C. The atomic mass of iron.D. The atomic number of neon.E. The element represented by Cu.

SCSh,7c

52. Use your periodic table in your textbook to help figure out the answers. A. Find the number of neutrons in Gold.

B. What sub-atomic particle does the atomic number represent?

C. What is the atomic mass of Gold? D. How many electrons does Gold have?

Q.O.D.53.

A. Where are valence electrons located? B. What element has an

atomic mass of 101.07? C. What is the mole mass weight of the

element in B above?

Q.O.D.

54. Using the information below, determine the number of neutrons that most _______ atoms contain. 29

??????????

63.546 2,8,18,1A. 29 C. 64B. 35 D. 93

55.Use your periodic table in your textbook to find

the answers. Find Tungsten. a. What sub-atomic particle is the atomic

number? How many in Tungsten? b. Tungsten’s atomic mass? c. Tungsten’s number of electrons? d. Tungsten’s number of neutrons?

Q.O.D.56. A. What is the total number of oxygen atoms in

the products 4CO2 + 6H2O?

A. 7 B. 14 C. 12 D. 3B. What is the total number of oxygen atoms in

the reactants 2N2O5 + NO?

A. 7 B. 8 C. 3 D. 11SPS2

Q.O.D.57. Which of the following is a true statement?A. Matter is conserved in a chemical reaction.B. Matter is created in a chemical reaction.C. Matter is destroyed in a chemical reaction.D. All of the above statements can be true

depending on the reaction.

SPS5,2b

Q.O.D.

58a. Which particles have approximately the same mass?

A. Proton and electronB. Proton and neutronC. Electron and neutronD. Electron and alpha particleSPS1a.

58b . An atom contains ____ in various energy levels.A. neutrons B. protons C. electrons D. ions

Q.O.D.59. Using the periodic Table:a. Write the number of valence electrons in an

atom of Beryllium and Magnesium. b. Are oxygen and selenium in the same period

or group?

SPS4,8

Q.O.D.60. Answer the following questions about the

chemical reaction for the combustion of methane gas: CH4 + O2CO2 + H2O

Identify the reactants.A.) CO2 and H2O B.) CH4 and O2

C.) O2 and H2O D.) CH4 and CO

Identify the products.A.) CO2 and H2O (B.) CH4 and O2

C.) O2 and H2O (D.) CH4 and CO2 cont’d----

Q.O.D.

CONT’D---60. CH4 + O2CO2 + H2O Is the chemical

reaction for the combustion of methane balanced? If not, select the correct equation from the ones listed below.

A. Yes, it is balanced. B. No, this is balanced: CH4 + O2CO2 + 4H2O

C. No, this is balanced: CH4 + 2O2CO2 + 2H2O

D. No, this is balanced: CH4 + 4O2CO2 + H2OSPS2

Q.O.D.61. Find Lithium and Sodium in the periodic

Table. Which of the following statements is true regarding these two elements?

A. They have the same number of electrons in their valance shell.

B. They have the same number of protons in their nucleus.

C. They are both noble gases. D. They are in the same row of the Periodic

Table. SPS1.4

Q.O.D.

62. Which subatomic particle will be MOST electrostatically attracted to a negatively charged object?

• A) Proton• B) Neutron• C) Electron• D) Beta particle

SPS10c.

Q.O.D.

63. A chemical equation is balanced when:A. there are the same number of atoms on the

reactant side and the product side B. there are the same kind of atoms on both the

reactant side and the product side C. there are the same number and kinds of

compounds on both the reactant and the product side

D. there are the same number of each kind of atom on both the reactant and the product side SPS2

Q.O.D.64.Using the table below for reference, find the

formula mass for nitric acid, HNO3.

Atom Atomic MassHydrogen 1.010Nitrogen 14.01Oxygen 16.00A. 63.02 amu B. 16.01 amu C. 31.02 grams D. 48.00 amu

Q.O.D.65. The principle of conservation of atoms is

satisfied in a chemical equation when:A. all of the atoms involved in the equation have an

oxidation number of 1+. B. the reactant side has the same number of each type

of atom as the product side. C. the sum of the coefficients on the reactant side is the

same as the sum of the coefficients on the product side.

D. each atom on the product side has the same subscript that it had on the reactant side. SPS2

Q.O.D.66.a.)Which of the following substances is

acidic? A. Distilled water (B). Hand soap C. Vinegar (D). Ammonia

66.b.) Which of the following substances is a base?

A.Vinegar (B). Ammonia (C). Lemon juice (D). Distilled water SPS6

Q.O.D.

39. Magnesium(Mg) looses 2 electrons to form a magnesium ion. Chlorine(Cl) gains one electron to form a chloride ion. Select the correct formula for magnesium chloride.

A. MgClB. Mg2ClC. MgCl2D. Mg2Cl2SPS2b

Q.O.D.45a. Water is a solvent in which of the following

solutions?A. Air B. Liquid sterling silver C. Saline (salt) solution D. Corn oil45b. Fourteen-karat gold is:A. an alloy. B. a solution. C. a mixture of two solids. D. All of the above are correct. SPS6

QOD

47. Which of the following pH values is the most acidic?

A. 1 B. 3 C. 5 D. 1448.A neutral solution has a pH of: A. 1 B. 5 C. 7 D. 14SPS6

Q.O.D.

49. An example of an exothermic reaction is:A. refining aluminum ore. B. activating an instant cold pack. C. heating "meals-ready-to-eat" (MREs) by

pouring water into the ration heater.D. changing water to steam.SPS2

Q.O.D.51.Which of the following is not exothermicA. heat is produced B. Mg + 2H2O --> Mg(OH)2 + H2 + energy

C. more energy is required to break the bonds in the reactants than is released from the formation of new bonds in the product

D. less energy is required to break the bonds in the reactants than is released from the formation of new bonds in the product

SPS2

Q.O.D.52. Which of the following is not endothermicA. heat is absorbed B. NH4NO3 + H2O + energy --> NH4 + NO3

C. More energy is required to break the bonds in the reactants than is released from the formation of new bonds in the product

D. Mg + 2H2O --> Mg(OH)2 + H2 + energy

SPS2

Q.O.D.

53. Changing a subscript when balancing an equation

A. is the correct way to change the number of atoms of an element

B. would change the chemical make up of the compound

C. cannot result in the same number of each kind of atom on both the reactant and product side

D. is the only way to satisfy conservation of atoms SPS2

Q.O.D.59.On a 10-speed bicycle, gears increase the

mechanical advantage of the bicycle. In which of the following situations would you want the greatest mechanical advantage for the gear system?

A. Climbing up a hill B. Coasting down a hillC. Riding on level ground D. Stopping suddenly to avoid a crashSPS8

Q.O.D.66. The diagram illustrating two waves in phase

is: A. B. C. D.

A. B. C.

A. B. C. D.

a.   .