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PS 101. Kim Cohn Email address [email protected]. 2 nd Grade Standards. The motion of objects can be observed and measured. As a basis for understanding this concept: - PowerPoint PPT Presentation
Transcript of PS 101
Chem Review - 12
22ndnd Grade Standards Grade Standards
The motion of objects can be observed and measured. As a basis for understanding this concept:
Students know the position of an object can be described by locating it in relation to another object or to the background.
Students know an object's motion can be described by recording the change in position of the object over time.
Chem Review - 13
22ndnd Grade Standards Grade Standards
Students know the way to change how something is moving is by giving it a push or a pull. The size of the change is related to the strength, or the amount of force, of the push or pull.
Students know tools and machines are used to apply pushes and pulls (forces) to make things move.
Students know objects fall to the ground unless something holds them up.
Chem Review - 14
22ndnd Grade Standards Grade Standards
Students know magnets can be used to make some objects move without being touched.
Students know sound is made by vibrating objects and can be described by its pitch and volume.
Chem Review - 15
Big Ideas in ChemistryBig Ideas in Chemistry
What are the big ideas in chemistry?Everything is made up of stuff which we
call matter or chemicals.All matter is made up of just 112 different
types called elements.All matter is made up of small particles
called atoms.
Chem Review - 16
QuestionQuestion
1) Which radiation has no electric charge associated with it?
A) gamma raysB) beta raysC) alpha raysD) all of theseE) none of these
Chem Review - 17
QuestionQuestion
2) A quark isA) an elementary particle.B) a building block of leptons.C) a building block of nucleons.D) all of these.E) none of these.
Chem Review - 18
QuestionQuestion
3) Different isotopes of an element have different numbers of
A) photons.B) neutrinos.C) protons.D) neutrons.E) none of these.
Chem Review - 19
QuestionQuestion
4) The half-life of a radioactive substance is independent of
A) whether the substance exists in an elementary state or in a compound.
B) the temperature of the substance.C) the age of the substance.D) the number (if large enough) of atoms in
the substance.E) all of these.
Chem Review - 110
QuestionQuestion
5) The half-life of an isotope is one day. At the end of two days the amount that remains is
A) one-eighth.B) one-half.C) one-quarter.D) none.E) none of these.
Chem Review - 111
QuestionQuestion
6) Carbon-14 is produced in the atmosphere principally by
A) cosmic ray bombardment.B) photosynthesis.C) nitrogen bombardment.D) plants and animals.E) none of these.
Chem Review - 112
QuestionQuestion
7) Radioactivity in the world is somethingA) relatively new.B) as old as the world itself.
Chem Review - 113
QuestionQuestion
8) The helium in a child's balloon is composed of
A) former beta particles.B) alpha-particle remnants of previous
radioactive processes.C) both of these.D) none of these.
Chem Review - 114
QuestionQuestion
9) When the hydrogen isotope tritium-3 emits a beta particle, it becomes an isotope of
A) lithium.B) hydrogen.C) helium.D) carbon.E) none of these.
Chem Review - 115
QuestionQuestion
10) It's impossible for a hydrogen atom to emit an alpha particle.
A) TrueB) False
Chem Review - 116
QuestionQuestion
11) In nuclear fission and nuclear fusion reactions, the amount of mass converted to energy is about
A) 20%.B) less than 1%.C) more than 30%.D) 10%.E) 30%.
Chem Review - 117
QuestionQuestion
12) The function of graphite in the first atomic reactor was to
A) absorb fast neutrons.B) moderate uranium isotopes.C) emit fast neutrons.D) slow fast neutrons.E) none of these.
Chem Review - 118
QuestionQuestion
13) The nucleus with the greatest mass isA) hydrogen.B) uranium.C) lead.D) iron.E) plutonium.
Chem Review - 119
QuestionQuestion
14) Between nuclear fission and nuclear fusion, radioactive by-products are more characteristic of nuclear
A) fission.B) fusion.C) both of these.D) neither of these.
Chem Review - 120
QuestionQuestion
15) Detonation of a fission-type atomic bomb is started by
A) splitting a small piece of uranium.B) igniting a small thermonuclear bomb.C) turning on a laser cross fire.D) pressing together several small pieces of
uranium.E) none of these.
Chem Review - 121
QuestionQuestion
16) The most abundant element in the universe is
A) lead.
B) helium.
C) americanium.
D) hydrogen.
E) uranium.
Chem Review - 122
QuestionQuestion
17) Chemistry is the study of theA) microscopic.B) macroscopic.C) submicroscopic.D) All three of these with an emphasis on
the submicroscopic.
Chem Review - 123
QuestionQuestion18) A solid is not considered fluid becauseA) of the fixed arrangement of its atoms or
molecules.B) its atoms or molecules are under too much
pressure.C) its atoms or molecules are bound as close
together as possible.D) of the heavy nature of its atoms or molecules.
Chem Review - 124
QuestionQuestion19) The molecules of a gas at room
temperature move at aboutA) 10 km/h.B) 1 km/h.C) 1500 km/h.D) 150 km/h.
Chem Review - 125
QuestionQuestion20) During a chemical reactionA) old atoms disappear to be replaced by new
ones.B) old atoms transform into new ones.C) old atoms stick around merely switching
partners.D) none of the above.
Chem Review - 126
QuestionQuestion21) Growth in a living body is best considered an
example of aA) chemical change because of the irreversibility.B) physical change because it eventually comes to a
halt with the same person in tact.C) physical change because of changing physical
attributes.D) chemical change because chemical reactions are
involved.E) Two of the above are correct.
Chem Review - 127
QuestionQuestion22) One element is distinguished from another
by the number ofA) neutrons.B) protons.C) electrons.D) all of the above.E) Two of the above are correct.
Chem Review - 128
QuestionQuestion23) What is the difference between an element
and a chemical compound?A) An element consists of only one type of
atom.B) Only elements are normally found in nature.C) Only chemical compounds are normally
found in nature.D) A chemical compound is always more
massive than an element.
Chem Review - 129
QuestionQuestion24) When two different elements combine to form a
compound, the resulting properties of the compound areA) most like the element given in the greatest amount.B) about the average of the properties of the two
elements.C) predictable based upon the nature of the combining
elements.D) not necessarily anything like those of the elements.
Chem Review - 130
QuestionQuestion25) The proper name for the chemical
compound N2O isA) nitrogen oxide.B) nitrogen nitrate.C) dinitrogen oxide.D) nitrogen dioxide.
Chem Review - 131
QuestionQuestion26) Clean dry air is an example of a A) suspension.B) heterogeneous mixture.C) homogeneous mixture.D) solution.E) two of the above are correct.
Chem Review - 132
QuestionQuestion27) An infant gains 10 pounds. Why would
you consider this to be an example of a chemical change?
Chem Review - 133
Answers to QuestionsAnswers to Questions
1 A 9 A 17 D 25 C
2 D 10 A 18 A 26 E
3 D 11 B 19 C
4 E 12 A 20 C
5 C 13 E 21 E
6 A 14 A 22 B
7 B 15 D 23 A
8 C 16 D 24 D
