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8th Grade Science Benchmark Review

Quiz by Jennifer Davis

Grade 8
Science (2017)
Texas Essential Knowledge and Skills (TEKS)

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30 questions
Show answers
  • Q1

    A student pushes a 52 kg box across the floor with a net force of 65 N. What is the approximate acceleration of the box? Force = Mass x Acceleration

    1.25 m/s2

    0.8 m/s2

    3380 m/s2

    1.10 m/s2

    60s
    8.6a
  • Q2

    Using the Periodic Table, what two other elements that would have the same similar properties as Copper?

    Ne (Neon) and Zn ( Zinc)

    O (Oxygen) and Ni (Nickel)

    Fe (Iron) and Ti (Titanium)

    P (Phosphorus) and Ag (Silver) 

    60s
    8.5c
  • Q3

    What name is given to the vertical (up and down)columns of elements on the Periodic Table?

    Energy Levels

    Groups or Family

    Periods

    Columns

    60s
    8.5c
  • Q4

    What characteristic determines an element's chemical properties such as reactivity?

    Neutrons

    Nucleus

    Valence Electrons

    Protons

    60s
    8.5b
  • Q5

    Which element is the least reactive: Sodium, Neon, or Chlorine

    Sodium

    They all react the same

    Neon

    Chlorine

    60s
    8.5b
  • Q6

    How many neutrons are in the nucleus of a Sodium atom with a mass number of 23?

    33

    13

    11

    12

    60s
    8.5a
  • Q7

    What pair of elements has one nonmetal and one gas element?

    Zinc and Sulfur

    Lithium and Helium

    Arsenic and Neon

    Sulfur and Argon

    60s
    8.5c
  • Q8

    If iron conducts electricity, then what other element is a conductor of electricity?

    Copper, Cu

    Bromine, Br

    Xenon, Xe

    Nitrogen, N

    60s
  • Q9

    True or False: Metals are conductors and nonmetals are insulators of thermal energy.

    True

    False

    60s
  • Q10

    How many total atoms are present in this chemical formula:

    H3PO4

    12

    7

    9

    8

    60s
    8.5d
  • Q11

    How many atoms are in this chemical formula :

    C8H10N4O2

    24

    22

    10

    84

    60s
    8.5d
  • Q12

    How many atoms are in this chemical formula :

    HNO3

    4

    3

    6

    5

    60s
    8.5d
  • Q13

    Chemical or Physical Change: A solid formed at the bottom of the test tube, creating a new substance

    Physical change

    Chemical change

    60s
    8.5e
  • Q14

    What statement best defines a chemical change has happened?

    A new substance formed

    There was a change in shape

    Two liquids mixed into a solution

    There was a change in volume

    60s
    8.5e
  • Q15

    What describes a physical change?

    plants using nitrogen to make protein

    Water evaporating from salt water

    mushrooms decomposing organic matter

    trees using carbon dioxide to make sugars

    60s

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