Unit 3a Practice Test

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

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

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

Conservation of energy means that

Can't complete this sentence? Watch this: https://safeshare.tv/x/H6D_ViW0Ch4

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

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

Which statement is NOT true?

Need to review what a mixture is? https://safeshare.tv/x/ss5db6434244526

Another way to say reactants is

Check out something that will help with this answer: https://safeshare.tv/x/ss5db6445c90c08

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

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

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