Welcome to the Unit 3 Practice Test. This practice test will help you to find the answers BEFORE you take the real test. If you are struggling with anything on this test, contact your teacher and ask for information.
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Question 2
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Question 3
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Question 4
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Question 5
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Question 6
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Question 7
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Question 8
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Question 9
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Question 10
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Question 11
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Drag the descriptions to the correct category.
Need help on this question?
Look at a periodic table: https://ptable.com/
Watch a video: https://safeshare.tv/x/ss5db639e393fa7
Conducts electricity
High melting point
On the right side of the periodic table
Shiny
Malleable
Malleable, can be flattened
Ductile, can be pulled into wire
Insulator
Dull
Describe a metal
Describes a non-metal
What is the basic unit of matter?
Don't know the answer? Look here: https://www.thoughtco.com/most-basic-building-block-of-matter-608358
electron
element
atom
energy
The atomic number is the number of __________ in an atom.
Don't remember what an atom is? Try this: https://safeshare.tv/x/ss5db63ba476907
Can't remember how to find out the number? Watch this: https://safeshare.tv/x/ss5db63c7526419
electrons
protons
neutrons
groups
Conservation of energy means that
Can't complete this sentence? Watch this: https://safeshare.tv/x/H6D_ViW0Ch4
Energy cannot be created or destroyed
Energy can be created and destroyed
Energy can be created but not destroyed
Energy can be destroyed but not created
A reaction begins with 15 grams of reactant. How many grams of products will be formed by the reaction?
Can't remember how to think about this one? Watch a chemical reaction and see what happens: https://safeshare.tv/x/ss5db640ba937df
It depends on the type of reaction
10
15
20
Sodium explodes when it contacts water. If I have a compound that contains sodium, will it explode if it is exposed to water?
Eeeeek! I need to review the differences between a compound and an element: https://safeshare.tv/x/ss5db641d43e3d9
No, when elements combine to form a new material, they have properties unique to the new material
Yes, compounds have the same properties as their ingredients
Yes, but it will have a smaller explosion due to the chemical bonds in a compound
Only if there is a larger amount of sodium than other elements.
Which statement is NOT true?
Need to review what a mixture is? https://safeshare.tv/x/ss5db6434244526
A mixture can be separated into its parts
A mixture can be any collection of different elements, molecules, and/or compounds
A mixture is a group of chemically bonded substances
A mixture is not chemically bonded together
Another way to say reactants is
Check out something that will help with this answer: https://safeshare.tv/x/ss5db6445c90c08
ingredients
products
results
compound
Cells combine oxygen and glucose to create energy. This is called...
Hmm what is that called? Maybe Tim and Moby can help: http://quietube7.com/v.php/http://www.youtube.com/watch?v=7dKpnxEMzyw
Cellular respiration
Amazingly useful!
Breathing
Photosynthesis
Which of the following is an example of an exothermic reaction?
I need to review the differences between endothermic and exothermic reactions: https://safeshare.tv/x/ss5db648eb6fcd5
Fire burning
Evaporation
Ice melting
An instant cold pack
During a chemical reaction
I don't really get chemical reactions... I think I better watch this quick video: https://safeshare.tv/x/H1_hSUGOpWM