Introduction to Chemistry
Authored by Lisa Thompson
Science
8th Grade
NGSS covered
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which elements conduct heat or electricity?
Metals
Non-Metals
Noble Gases
Metalloids
Tags
NGSS.MS-PS3-3
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which element has an atomic number of 20?
Sodium
Magnesium
Potassium
Calcium
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which elements are stable and always on the move?
Metals
Non-Metals
Noble Gases
Metalloids
Tags
NGSS.MS-PS3-1
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
When investigating a chemical reaction, one would expect the products to have
The same properties as the reactants have separately
a mixture of the properties of the reactants
different properties than the reactants have separately
the same properties as only one of the reactants
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which action represents a chemical change?
melting gold
running an electrical current through copper wire
iron rusting in the course of time
breaking an ice cube into smaller pieces
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is the best evidence for a chemical change.
bubbles are given off
a precipitate is formed
the formation of a new substance
all the choices
Tags
NGSS.MS-PS1-2
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Why does increasing the concentration of reactants increase the reaction rate?
Increasing the concentration of the reactants causes the reacting particles to have more energy.
Increasing the concentration of the reactants causes the temperature to increase
Packing more particles into a fixed volume increases the frequency of collisions
Packing more particles into a fixed volume decreases the energy of the particles
Tags
NGSS.HS-PS1-5
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