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Lesson 1
Lesson 2
Lesson 3
Lesson 4
Vocabulary
100
When a ___________________________ change occurs, you may see changes in position, size, shape, volume, and phase of matter.
Physical Change
100
A substance used in the reaction (from a chemical reaction) is called a ______________________.
Reactant
100
Lemon juice and vinegar are two ( bases or acids ) ?
Acids
100
What scientist accidentally discovered penicillin?
Alexander Fleming
100
Before you use any cleansers, you should _____________.
READ THE DIRECTION!
200
True of False The Law of Conservation of Mass states that matter cannot be created or destroyed during a chemical reaction.
True
200
In a chemical equation, the products are listed on what side?
The right side.
200
In what ways can substances be separated?
They can be separated by their physical and chemical properties.
200
Medicines that kill bacteria are called_______________.
Antibiotics
200
Bronze and brass are 2 examples of a type of _________________.
Alloy
300
In what kind of chemical reaction does the parts of the molecule switch places, (just as 2 trucks can switch places)?
Replacement reaction
300
When elements and compounds come together to form new compounds, this is called a ______________________ reaction.
Combination reaction.
300
What color will universal indicator paper turn if it is dipped in a strong acid?
Red
300
A large molecule made of many identical smaller units connected together is a __________________________
Polymer
300
True of False You can treat rubber by heating it and adding sulfur to it to make it more durable.
True. This is called treated rubber.
400
In what kind of reaction do the compounds split apart to for smaller compounds?
Decomposition reaction
400
A special kind of 'sentence' called a _____________________ shows what happens during a chemical reaction.
Chemical equation
400
What color do you think indicator paper will turn if it were dipped in shampoo?
The paper would turn blue or purple because shampoo is a base.
400
What advantage did nylon have over earlier silk replacements?
Nylon does not easily burst into flames.
400
A solution that contains all the solute that can be dissolved without changing the temperature.
Saturated
500
How might a scientist distinguish the following compounds: Strontium chloride and potassium chloride?
The scientist could heat each of the compounds in a flame. Strontium chloride produces a red flame, and potassium chloride produces a purple flame.
500
A substance made during a chemical reaction is called the _________________________.
Product
500
What do you think will happen to limestone if acidic water flows across it?
The acidic water will dissolve the limestone.
500
( Untreated or treated ) rubber becomes brittle and cracks in cold weather.
Untreated rubber
500
A solution with so much solute that it is close to being saturated.
Concentrated