Exam Review 1) Which of the following is an example of a mixture? a) Iron filings b) Copper Wire c)...

Exam Review

1) Which of the following is an example of a mixture?a) Iron filingsb) Copper Wirec) Bronze Piped) Titanium Plate

Exam Review

1) What are the two things that can be Pure Substances?

Elements and Compounds

Exam Review

1) When I heat up a substance, what happens to the molecules in that substance?

a) They speed upb) They spread outc) They get more kinetic energy

All of the above

Exam Review

1) What is the difference between an element and a compound?

An element is a single atom (As seen on the periodic table); a compound is a chemical combination of

elements (H2O)

Exam Review

1) Which of the following is most likely classified as a colloid?

a) Oxygen gasb) Waterc) Fog (Think Colloid/Cloudy)d) Soda

Remember the Tyndall Effect

Exam Review

1) Where are Metals located on the periodic table? What about Nonmetals?

Metals: Left of the “Staircase” Nonmetals: Right of the “Staircase”

Exam Review

1) Why does the temperature remain constant between B and C?a) Because the substance is absorbing heat as it changes from a

solid to a liquidb) Because heat energy is released from the substance as it

changes from a liquid to a gasc) Because heat energy is released from the substance as it

changes from a solid to a gasd) Because the substance absorbs heat energy as it changes from

a liquid to a gas

Exam Review

1) *Which of the following is a gas at 45°C?a) Ethanolb) Hexanec) Methaned) Methanol

Exam Review

1) Describe the difference between a Physical and a Chemical change.

A physical change can be reversed.A chemical change changes the chemical structure of

the substance.

Exam Review

1) Which situation provides the BEST evidence that a chemical reaction is taking place?

a) A metal strip bends when heatedb) A solution freezes in waterc) Two solutions mix in a beaker to produce a solidd) A chemical completely dissolves in water, but the

temperature of the solution remains constant.

Exam Review

1) I want to show a chemical reaction. Which activity would BEST demonstrate a chemical reaction?

a) Placing a metal in an acid to create a gas.b) Measuring the density of liquid water and ice.c) Melting a piece of aluminum.d) Filling a balloon with helium gas

Exam Review

1) Which of the following is an alkaline earth metal?a) Lib) Oc) Ned) Ca (Second Column)

Exam Review

1) *Which BEST describes why water dissolves in most salts.

a) Water is polar, and salts form ions in solutions.b) Water is non-polar, and salts form ions in solutions.c) Water has the same density as salts.d) Water has a different density than salts.

Exam Review

1) A gemstone has a mass of 6.24g and a volume of 1.98cm3. What is the density of the gemstone? (D=M/V)

a) 2.20 g/cm3

b) 3.01 g/cm3

c) 3.15 g/cm3

d) 3.50 g/cm3

Exam Review

1) What are the charges of:Protons: PositiveNeutrons: NeutralElectrons: Negative

Exam Review

1) An element in Group 18, Period 4 would be classified as which type of substance?

a) A Halogenb) A Metalloidc) A Lanthanided) A non-metal (Specifically a Noble Gas)

Exam Review

1) An element that has an different number of Electrons than Protons is called a(n)

a) Isotopeb) Ionc) Atomd) Molecule

Exam Review

1) If two atoms of the same element have differing atomic masses, (C-12 and C-14 for example) what are they called?

a) Isotopesb) Ionsc) Telomeresd) Molecules

Exam Review

1) Draw the Bohr Model for Oxygen

Exam Review

1) Draw the Lewis Dot Structure for Oxygen

Exam Review

1) A gas has a volume of 4.52 L. If its mass is 8.05 g, what is the identity of the gas?

a) Heliumb) Neonc) Argond) Krypton

Exam Review

1) O-2 has how many electrons?a) 4b) 6c) 8d) 10 (8 for Oxygen, 2 more for -2)

Exam Review

What is the Oxidation Number of Nitrogen?

-3 (5 Valence Electrons, so 3 are needed)

Exam Review

Which element is represented?a) Boron (B)b) Phosphorous (P)c) Sulfur (S)d) Bromine (Br) (Has 7 Valence Electrons)

Exam Review

1) How many Protons, Neutrons, and Electrons does Cl-1 have if its mass # is 35?

Protons: 17 (Cl always has 18)Neutrons: 18 (35-17 = 18)Electrons: 18 (17 +1 for -1 = 18)

Exam Review

1) How many Protons and Neutrons does above element have?

a) 11 Protons, 11 Neutronsb) 11 Protons, 0 Neutronsc) 6 Protons, 5 Neutronsd) 5 Protons, 6 Neutrons

nn nn

nn

nn

nnnn

++

+ +

+

-

-

--

-

Exam Review

1) What element is the above element?a) Boron (5 Protons)b) Argonc) Arsenicd) Beryllium nn nn

nn

nn

nnnn

++

+ +

+

-

-

--

-

Exam Review

1) What is the atomic Mass of the above element?a) 5b) 6c) 11 (5+6)d) 16 nn nn

nn

nn

nnnn

++

+ +

+

-

-

--

-

Exam Review

1) How many valence electrons does the above element have?

a) 1b) 2c) 3 (It’s in the 13th column)d) 5

nn nn

nn

nn

nnnn

++

+ +

+

-

-

--

-

Exam Review

1) What accounts for most of the mass of an atom? a) Electronsb) Protonsc) Neutrons and protonsd) Electrons and neutrons

Exam Review

1) An atom has 29 Protons, 29 Electrons, and 35 neutrons. What is the mass number of the atom?

a) 29b) 35c) 64d) 93

Exam Review

1) An atom has 29 Protons, 29 Electrons, and 35 Neutrons. What element is represented?

a) Oxygen (O)b) Copper (Cu) (29 Protons)c) Iron (Fe)d) Germanium (Ge)

Exam Review

1) Which two elements have the same number of valence electrons?

a) C and Ob) Na and Mgc) Cl and F (7 each)d) Ga and Ge

Exam Review

1) Which of these elements is the most chemically reactive?

a) Zinc (Zn)b) Iron (Fe) c) Potassium (K) (Closest to a side)d) Germanium (Ge)

Exam Review

1) How many neutrons are there in an atom of Pu-246?a) 94b) 150c) 152 (246-94)d) 246

Exam Review

1) Which BEST represents how electrons are arranged in the energy levels of a carbon atom?

a) First energy level = 1 ElectronSecond energy level = 5 Electrons




Exam Review

1) Which element has the same number of valence electrons as krypton (KR)?

a) Neon (Ne) (18th column)b) Flourine (F)c) Chlorine (Cl)d) Selenium (Se)

Exam Review

1) Some coins are alloys of Zinc (Zn) and Copper (Cu). Which type of bond forms from these coins?

a) Covalentb) Hydrogenc) Ionicd) Metallic (Metal + Metal)

Exam Review

1) Atoms of which two elements would form an ionic bond?

a) Mg and Cl (Metal + Nonmetal)b) N and Oc) Fe and Cod) Rb and Al

Exam Review

1) Which compound would most likely be formed when lithium (Li) and Nitrogen (N) are chemically combined?

a) LiN

b) Li3N (Li+1 and N-3 Drop it Swap It)

c) LiN3

d) Li3N3

Exam Review

1) Which compound results from covalent bonding?

a) NH4Cl (All Non-Metals)

b) K2SO4

c) NaCl

d) Mg(OH)2

Exam Review

1) Sodium (Na) and Chlorine (Cl) will react to form a(n) ________ bond.

a) Ionicb) Covalentc) Metallicd) James

Exam Review

1) Which chemical formula represents Magnesium Phosphate?

a) MgPO4

b) Mg2PO4

c) Mg3(PO4)2 (Mg+2 and PO4-3)

d) Mg2(PO4)3

Exam Review

1) Which statement BEST describes the atoms of elements that form compounds by covalent bonding?

a) They share electrons between themb) They have a large difference in atomic massc) They are in the same period in the periodic tabled) They have a difference in valence electron number

Exam Review

1) Lithium and Oxygen will most likely react to form:a) Lithium Oxide (LiO)

b) Lithium Oxide (Li2O) (IONIC)

c) Dilithium Oxide (Li2O)

d) Lithium Dioxide (LiO2)

Exam Review

1) Aluminum and Sulfur will most likely react to form:a) Aluminum Sulfide (AlS) (1 of each)

b) Aluminum Sulfide (Al3S3)

c) Triluminum Trisulfide (Al3S3)

Exam Review

1) Nitrogen and Chlorine will most likely react to form:a) Nitrogen Chloride (NCl)

b) Nitrogen Chloride (NCl3)

c) Trinitrogen Chloride (N3Cl)

d) Nitrogen Trichloride (NCl3) (COVALENT)

Exam Review

1) Which chemical equation represents a double replacement reaction?

a) 2Na + Cl2 -> 2NaCl

b) 2KClO3 -> 2KCl + 3O2

c) Zn + 2HCl -> ZnCl2 + H2

d) NaOH + HCl -> NaCl + H2O

Exam Review

1) What type of chemical reaction is represented by this equation?

2Li + 2H2O -> 2LiOH + H2

a) Decompositionb) Double Replacementc) Single Replacementd) Synthesis

Exam Review

1) Balance the following equation: __2__ Na2Cl -> __4__ Na + ____ Cl2

Exam Review

1) This is an unbalanced chemical equation: ____ HgO -> ____ Hg + ____ O2

Which equation is the correctly balanced chemical equation for this reaction?

a) HgO -> Hg + 2O2

b) 2HgO -> Hg +O2

c) 2HgO -> 2Hg + O2

d) 2HgO -> Hg + O2

Exam Review

1) Which (Acids or Bases) will do the following?

a) Donate H+ Ions when reacting with Water to form H3O

(Hydronium) Ab) Separate from OH (Hydroxide) molecules when reacting with

water. Bc) Always end in OH. (NaOH) Bd) Usually (99%) start with H. (HCl) Ae) Turn Litmus Paper Red. Af) Turn Litmus Paper Blue. Bg) Has a pH above 7 Bh) Has a pH below 7 A

Exam Review

1) What will result from HF (Hydrofluoric Acid)

combining with H2O (Water)?Write the full reaction below: HF + H2O -> H3O + F

Exam Review

1) What will result from LiOH (Lithium Hydroxide)

combining with H2O?Write the full reaction below: LiOH + H2O -> H2O + Li + OH

Exam Review

1) What will result from HCl reacting with NaOH (Neutralization reaction)?

Write the full reaction below: HCl + NaOH -> H2O + NaCl

Exam Review

1) BONUS! If I ever see a compound that ends in “ate,” such as Phosphate, where should I look to find it?

In the Resource List on your test!

Exam Review

1) Why are beta particles able to penetrate objects better than alpha particles?

a) Because beta particles are larger than alpha particlesb) Because beta particles are smaller than alpha particlesc) Because beta particles are negatively charged, while

alpha particles are neutrald) Because beta particles travel in a straight line, while

alpha particles travel in waves.

Exam Review

1) An speeds up from 0 to 12 m/s over 6 seconds. What is the object’s acceleration?

a) 1m/s/sb) 2m/s/sc) 4m/s/sd) 8m/s/s

Exam Review

1) A car is travelling at a constant speed of 12 m/s. When the driver accelerates, the car reaches a speed of 26 m/s in 6 s. What is the car’s average acceleration?

a) 2 m/s/sb) 2.3 m/s/sc) 4.2m/s/sd) 84 m/s/s

Exam Review

1) How does the speed of the cart compare when t=2s and t=5s?

a) The speed of the cart at 2s is greater than the speed at 5s.

b) The speed of the cart at 2s is less than the speed at 5s.c) The speed of the cart is 1m/s at 2s and at 5s.d) The speed of the cart is 10m/s at 2s and at 5s.

Exam Review

1) A car is pushed 25 meters over 30 seconds. What is its average speed?

a) 0.83 m/sb) 1.17 m/sc) 5 m/sd) 65 m/s

Exam Review

1) If it took 5.38 s to reach the final velocity, which train had the greatest acceleration?

a) Wb) Xc) Yd) Z

Exam Review

1) A ball is dropped and hits the ground in 1.5 s with a final speed of 15m/s. How would the acceleration and final speed of the ball be affected if it were dropped from a greater height?

a) Its final speed would remain the same because the rate of acceleration would remain the same.

b) Its final speed would increase because its rate of acceleration would remain the same.

c) Its final speed would remain constant because its rate of acceleration would decrease.

d) Its final speed would increase because its rate of acceleration would increase.

Exam Review

1) Which of Newton’s laws explains why, when you let the air out of a balloon, it flies away? (Think about the air escaping)

a) Newton’s First Lawb) Newton’s Second Lawc) Newton’s Third Law

Exam Review

1) Why does a flat piece of notebook paper take longer to reach the ground than an identical piece of notebook paper crumpled into a ball?

a) The flat piece has more massb) The crumpled piece has more massc) The frictional force of air has more effect on the falling

flat pieced) The frictional force of air has more effect on the

crumpled piece

Exam Review

1) A student applies a force to a box with a mass of 30kg. If he applies that same force to a box with 15kg, which BEST describes the effect on the acceleration of the 15kg box?

a) It is half the acceleration of the 30kg box.b) It is double the acceleration of the 30kg box.c) It is the same acceleration of the 30kg box.d) It is triple the acceleration of the 30kg box.

Exam Review

1) A large rock has a mass of 750 kg. What is its weight?a) 76.5 Nb) 740.2 Nc) 759.8 Nd) 7,350 N

Exam Review

1) A 100kg student kicks a 1.5kg ball with a force of 450 N. What force does the ball apply to the student?

a) 4.5 Nb) 300 Nc) 450 N (THAT WAS A TYPO)d) 675 N

Exam Review

1) Why does the weight of an object change with increasing elevation on Earth?

a) The mass of the object decreases with higher elevationb) The force of gravity acting on the object increases with

higher elevationc) The force of gravity acting on the object decreases with

higher elevationd) The mass of the object increases with higher elevation

Exam Review

1) What type of friction occurs when an eraser is rubbed across a sheet of paper?

a) Staticb) Slidingc) Rollingd) Fluid

Exam Review

1) Two students pull on opposite ends of a rope, but neither student is able to move the other. Which statement BEST explains why neither student is moved?

a) They each pull on the rope with the same amount of force, so the net force (Fnet) is 0.

b) They each exert the same amount of friction against the ground, so the net friction is 0.

c) Their forces are not balanced, but gravity keeps them from moving.

d) The two students have the same mass.

Exam Review

1) What is the magnitude of Force (F) if the object is at rest?

a) 6Nb) 8Nc) 14Nd) 22N

Exam Review

1) A student moves a box across the floor by exerting 23.3 N of force and doing 47.2 J of work on the box. How far does the student move the box?

a) 0.49 mb) 2.03 mc) 23.9 md) 1,099.8 m

Exam Review

1) The board exerts an upward force of 50 N. Which best explains this situation?

a) The board has a weight of 50 N.b) The Cylinder has a weight of 50 N.c) The combined weight of the bricks is 50 N.d) The combined weight of the bricks, board, and cylinder

is 50 N.

Exam Review

1) Student X pushes a 10N box with a force of 2N. At the same time, Student Y pushes the same box with a force of 6N, but in the opposite direction. Which would most likely occur?

a) The resultant force on the box would be 8N.b) The resultant force on the box would be 18N.c) The box will move towards student X.d) The box will move towards student Y.

Exam Review

1) A metal spoon is used to stir a cup of hot coffee. The person holding the spoon feels the spoon get hot. Which best describes the transfer of heat to the spoon?

a) Radiationb) Electricalc) Conductiond) Convection

Exam Review

1) What happens to the kinetic energy and gravitational potential energy of a ball during freefall?

a) Gravitational Potential Energy and Kinetic Energy both increase.

b) Gravitational Potential Energy and Kinetic Energy both decrease.

c) Gravitational Potential Energy decreases and Kinetic Energy increases.

d) Gravitational Potential Energy increases and Kinetic Energy decreases

Exam Review

1) A person places a metal spoon that is at room temperature into a bowl of hot soup. How will the thermal energies of the spoon and soup be affected?

a) The spoon will increase in thermal energy, and the soup will decrease in thermal energy.

b) Both the spoon and the soup will increase in thermal energy.c) The spoon will decrease in thermal energy and the soup will

increase in thermal energyd) Both the spoon and the soup will decrease in thermal energy

Exam Review

1) ***An object has a mass of 12.8 kg and a velocity of 8.4 m/s. What is the kinetic energy of the object? USE THE FORMULA PAGE!

a) 53.8 Jb) 107.5 Jc) 451.6 Jd) 903.2 J

Exam Review

1) ***How much potential energy does a 55-kg person gain when she walks to the top of a hill 20 m tall? USE THE FORMULA PAGE!

a) 75 Jb) 539 Jc) 1,100 Jd) 10,780 J

Exam Review

1) **A ball with a mass of 5kg is dropped from a resting point of 10m above the ground. What is the potential energy of the ball just before it was dropped? (USE YOUR FORMULA SHEET!)

a) 0 Jb) 49 Jc) 98 Jd) 490 J

Exam Review

1) If 15 N of force is applied to a cart to move it 5m, how much work is done on the cart?

a) 0.33 Jb) 3 Jc) 15 Jd) 75 J

Exam Review

1) Draw a Closed Series Circuit

I won’t draw this for you >.<

Exam Review

How much current flows through this circuit?

a) 0.5 Ab) 2 Ac) 18 Ad) 72 A

Exam Review

1) A series circuit has a current of 3A. The circuit contains 12 Ω of resistance. What is the voltage of the circuit?

a) 0.25 Vb) 4 Vc) 15 Vd) 36 V

Exam Review

1) What would happen to the current if I were to double the voltage of a circuit?

a) The current would quadrupleb) The current would doublec) The current would remain constantd) The current would be halved

Exam Review

Exam Review

1) How could I make an electromagnet WEAKER?a) Increase the size of the coreb) Increasing the currentc) Increasing the number of coilsd) None of the above

Exam Review

1) How would decreasing the diameter of a wire influence the resistance and flow of electrons in a circuit?

Mo’ diameter = Mo’ flo’.

Exam Review

1) Which statement BEST explains why there would be a force of attraction between two electrically charged objects?

a) They have like chargesb) They have unlike chargesc) They have the same # of protonsd) They have the same # of electrons

Exam Review

1) Describe what would happen if I brought two North ends of a magnet together.

They would repel each other.

Exam Review

1) Which is the lowest point of a transverse wave?a) Amplitudeb) Crestc) Periodd) Trough

Exam Review

1) **A sound wave has a frequency of 247 Hz and a wavelength of 1.4 m. What is the speed of the sound wave in air?

USE YOUR FORMULA SHEET!a) 176.4 m/sb) 245.6 m/sc) 248.4 m/sd) 345.8 m/s

Exam Review

1) What is true of infrared waves? (USE YOUR RESOURCE SHEET)

a) They have shorter wavelengths than X-raysb) They give off more energy than X-raysc) They have longer wavelengths than ultraviolet waves.d) They have higher frequencies than visible light.

Exam Review 1) Which of the following is an example of a mixture? a) Iron filings b) Copper Wire c)...

Documents

Transcript of Exam Review 1) Which of the following is an example of a mixture? a) Iron filings b) Copper Wire c)...