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100
During a ____________ reaction, mater is neither CREATED nor DESTROYED.
What is chemical.
100
Name an example of a polymer. (One we keep reading about in class.)
What is nylon.
100
A log burning in a fire is an example of ______________.
What is combustion.
100
When indicator paper turns red, it means that the substance is a strong _ _ _ _.
What is acid.
100
Before using a chemical, the first thing you should do is _ _ _ _ the _ _ _ _ _ _ _ _ _ _.
What is read the directions.
200
T/F: Penicillin, an important life-saving medicine, was accidentally discovered by Albert Einstein.
What is False -- Alexander Fleming.
200
T/F: When two compounds split apart and the parts switch places, it is a combination reaction.
What is False: replacement reaction -- switch = replacement
200
T/F: A separation reaction is when elements or compounds come together to form new compounds.
What is False: combination reaction = come together equals combination!!!
200
T/F: Orange indicator paper tells me that the liquid being tested is a base.
What is False = red and orange are acids.
200
T/F: When one kind of matter changes into another kind of matter, it is a physical change.
What is True.
300
C + O + O = CO2 (<-- little two). What are the reactants?
What is carbon and oxygen.
300
C + O + O = CO2 (<-- little two). What is the product?
What is carbon dioxide.
300
An indicator paper dyed green tells me that the liquid is a(n) _ _ _ _.
What is base.
300
If I have a kleenex and I rip it in half, did a physical or chemical change occur?
What is physical change. It is still a kleenex, just it's size and shape changed.
300
Is this a chemical change or a physical change? Vinegar when poured on limestone breaks down the limestone and causes it to wear away and dissolve the limestone. What clues tell you this is so?
What is chemical change.
400
If matter is changed from one kind to another, what kind of change occurred?
What is physical.
400
When matter is changed to different kind of matter and the properties have different, what kind of change has occurred?
What is chemical.
400
When two compounds split apart and the parts switch places, it is a _____________ reaction.
What is replacement. Look at the base word=re/place/ment. Place=where it's located. If I am re-placing something, I am placing it again, replacement, switching places. Make sense??
400
A _____________ reaction is when elements or compounds come together to form new compounds.
What is combination. Look at the base word of combination. Take off -tion and you're left with what the original word was=combine. When you combine something, things are coming together or are put together. Make sense?
400
____________ is an important life-saving medicine, was accidentally discovered by Alexander Fleming.
What is penicillin.
500
What does the chemical equation look like for carbon dioxide?
What is C + O + O = CO2.
500
Why is treated rubber so desirable? Explain.
What is Treated rubber does not dry or crack during cold weather or melt during warm weather. Treated rubber is more desirable because it can be used in all climates year-round for items such as automobile tires.
500
Explain HOW scientists can separate a fossil from limestone without damaging the fossil.
What is Scientists can use vinegar to wear away the limestone. The vinegar reacts chemically with the limestone and dissolves the limestone around the fossil. The fossil remains undamaged because the vinegar does not react with the fossil.
500
Why is treated rubber so desirable? Explain.
What is Treated rubber does not dry or crack during cold weather or melt during warm weather. Treated rubber is more desirable because it can be used in all climates year-round for items such as automobile tires.
500
Explain HOW scientists can separate a fossil from limestone without damaging the fossil.
What is Scientists can use vinegar to wear away the limestone. The vinegar reacts chemically with the limestone and dissolves the limestone around the fossil. The fossil remains undamaged because the vinegar does not react with the fossil.
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