END Of Year Review 8th Grade Science Question Preview (ID: 61664)
End Of Year Review.
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In a chemical reaction, the number of atoms in the products will always equal which amount?
a) the number of atoms in the reactants
b) half of the number of atoms in the reactants
c) 3 times the number of atoms in the reactants
d) twice the number of the atoms in the reactants
Which of the following are signs of a chemical reaction?
a) a change in shape
b) Formation of a gas
c) A change in color
d) A change in size
Which statement correctly describes the location and charge of the electrons in an atom?
a) The electrons are inside the nucleus and have no charge
b) The electrons are outside the nucleus and have a negative charge.
c) Neutrons have a negative charge and are located in the nucleus
d) Protons have no charge and are in the nucleus
Which subatomic particles contribute the most to the mass of an atom?
a) Protons, Neutrons, Electrons
b) Protons only
c) Protons and Electrons
d) Protons and Neutrons
what is the net force?
a) 7N moving to the left
b) 3N moving to the right
c) 10 N moving to the left
d) 3N moving to the left
a
a) a
b) a
c) a
d) a
a
a) a
b) a
c) a
d) a
a
a) a
b) a
c) a
d) a
a
a) a
b) a
c) aa
d)
a
a) a
b) a
c) a
d) a
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