Molecular Formulas
Old Substance vs New Substance
Chemical Reactions
Phase Changes and Mixture of Questions
Other
100
Draw a molecular model of H2O and record how many Hydrogen and Oxygen atoms there is.
2 Hydrogen 1 Oxygen
100
Give me a real life example of a reactant and product
Check answer
100
Define Chemical Reaction:
When you combine 2 or more substances to create something new
100
What does a arrow sign ----> mean in science?
(I WANT SCIENTIFIC NAME)
------>>>>> means YIELD in science
100
If your work is missing and not turned in before the 9 weeks come to an end what happens to your grade for those assignments?
It will be a ZERO in the gradebook
200
If you have 2 molecular models of H2O how many Hydrogen and Oxygen atoms would you have total?
4 Hydrogen Atoms
2 Oxygen Atoms
200
Which change will produce a new substance that can’t be undone? Circle the correct answer.
A. Dissolving Gatorade mix in water
B. Burning a piece of bread in a toaster
C. Heating water until it evaporates
D. Cooling water until it freezes
B. Burning a piece of bread can't be undone or reversed
200
Which of the following observations does not indicate a chemical reaction has taken place?
A. Temperature and/or color change
B. A substance melts
C. Gas is released - bubbles appear
D. A precipitate was formed
B
200
Which of the following is an example of a phase change? Select all that apply.
A. Freezing water
B. Melting fat
C. Making hot chocolate
D. Baking Bread
A, B
200
Fill in the blank:
Ms. C will say this towards the ending of class each day "If you stand up you better ....
Why does Ms. C say this?
"If you stand up you better sit right back down"
The bell does not dismiss you Ms. C does
300
A chemical reaction between two molecules of hydrogen gas (2H2) and one molecule of oxygen gas (O2) forms two molecules of water (2H2O). Rosalie makes a model to represent this reaction, but it has an error. Draw the correct model.
Check Drawing
300
When Copper and Acidic Acetate interact together, it produces Copper Acetate, which is a new substance. Label down below the reactant, product and new/ old substance.
Copper+ Acidic Acetate —--------> Copper Acetate
Copper+ Acidic Acetate: Reactant/ Old
Copper Acetate: Product/ New
300
Based on the experiment, the combination of the powdered drink and water in Flask #1 would it be considered a new substance, chemical reaction or mixture?
Mixture, no new substance was created because we were able to separate the powder drink mix from the water by boiling it.
300
When liquid water boils, the water undergoes a _______ change from ________ to ______, but it’s all still water. Electrolysis is a chemical reaction. The atoms in the water molecules rearrange to form separate hydrogen gas and oxygen gas.
- Phase
- Liquid
- Gas
300
What are the 4 rules Ms. C has in class?
1. Respectful
2. Responsible
3. Ready
4. Safe
400
Look at the symbols for magnesium, oxygen, and magnesium oxide. Use the following space to draw a model of what happened in this chemical reaction.
Magnesium: MG
Oxygen: O2, Magnesium oxide: 2MGO
400
What is the difference between a reactant and a product?
Reactant is when 2 or more substances are combines to react with each other.
Product is the end result or final product after the reaction had taken place.
400
What is the difference between a mixture and a chemical reaction?
One way to decide whether substances interacted to form a new substance or if they combined to make a mixture is to attempt to separate it back to its original substance. If a chemical reaction has occurred the substance cannot go back to its original state as the atoms have rearranged to form a new molecule.
400
Define: Phase Change
A phase change is when you still have the same substance, it just goes from one state of matter to another (solid, liquid, gas).
400
When exiting the classroom every student needs to do what before they leave?
Push in your chair and ensure your area is clean before leaving
500
The drawing below shows a model developed to represent a molecule of copper acetate. Based on the model, what is the atomic composition of copper acetate? Fill in the blanks with the correct number of atoms.
_____ copper atom(s) ______ oxygen atom(s) ______ hydrogen atom(s) ______ carbon atom(s)
1 Copper
4 Oxygen
6 Hydrogen
4 Carbon
500
A chemical reaction describes what is happening and how substances interact with each other in the form of symbols instead of words in sentences. What does each symbol and numbers represent in the molecular formula?
Example: 2MgO
Symbol: Represent element Mg= Magnesium
Numbers: Number and types of atoms that are in the reaction.
500
During a chemical reaction, how do you know a new substance is formed?
The properties of the substance will have changed; there will be a higher/lower density or melting point; it may no longer be soluble in certain liquids, or its color may have changed.
500
Define:
Open System:
Closed System:
Open system: allows both matter and energy to enter and leave
Closed system: only allows energy to exchange with its surroundings
500
What are the consequences IN THE CORRECT ORDER if class rules are not followed?
Also when making a phone call home due to poor behavior who makes the phone call home and why.
VERBAL WARNING
STUDENT/TEACHER CONFERENCE
PARENT PHONE CALL/CONFERENCE (YOU WILL CALL HOME AND EXPLAIN TO PARENT/ GUARDIAN WHAT YOU DID TO HAVE TO CALL HOME
REFERRAL/ REQUEST FOR PARENT RETURN