Chemical or Physical?
This is an example of a physical change.
a) glass breaking
b) burning firewood
c) gas formed when mixing vinegar and baking soda
d) a copper roof changing color from red to green
What is a) glass breaking?
A chemical equation represents a ______________.
What is a chemical reaction?
The graph shown represents a ___________.
What is a chemical reaction (or chemical change)?
The process that occurs in ONLY plant cells.
What is photosynthesis?
The ---> in a chemical equation means __________.
a) equals
b) produces
What is b) produces?
This is an example of a chemical change.
a) water evaporating
b) sugar dissolving in water
c) nails rusting
d) wax melting
What is c) nails rusting?
An example of a chemical equation.
a) C
b) CO2
c) C2
d) C2 + 2O2 ---> 2CO2 ?
What is d) C2 + 2O2 ---> 2CO2 ?
The point where ONLY the reactants are present.
What is point A?
This is how photosynthesis and cellular respiration are related.
What is they are opposite processes?
Photosynthesis: 6CO2 + 6H2O ---> C6H12O6 + 6O2
Cellular Respiration: C6H12O6 + 6O2 ---> 6CO2 + 6H2O
Mixing blue and yellow paint to get green is a __________ change.
What is physical?
An indicator of a chemical change.
a) gas bubbles form in boiling water
b) sugar disappears when dissolved in water
c) a gas forms when vinegar and baking soda are mixed
d) a liquid changes color from clear to green when green food coloring is added
What is c) a gas forms when vinegar and baking soda are mixed?
The reactants in the equation below:
C2 + 2O2 ---> 2CO2
What is C2 and 2O2 ?
The point where ONLY the products are present.
What is point C?
The reactants of photosynthesis are ______ and ______ and the products of photosynthesis are ______ and ______.
What is carbon dioxide and water are the reactants and sugar and oxygen are the products.
Photosynthesis: 6CO2 + 6H2O ---> C6H12O6 + 6O2
Cellular Respiration: C6H12O6 + 6O2 ---> 6CO2 + 6H2O
In a chemical reaction, atoms are ___________.
a) not affected
b) rearranged
c) created
d) destroyed
What is b) rearranged?
Two indicators that the scenario below is a chemical change.
Scenario: Carlos measures 50ml of a clear liquid and mixes in 10g of a powder into a beaker. The contents of the beaker changes from clear to blue and a white material forms at the top of the beaker.
What is color change and a new substance is formed?
The products in the equation below:
C2 + 2O2 ---> 2CO2
What is 2CO2 ?
The point where the reaction is actively taking place.
What is point B?
The chemical reaction that STORES energy.
What is photosynthesis?
The indicator of a chemical change in The Witches' Brew Demo.
What is change in color?
Four indicators of a chemical change.
What is temperature change, change in color, new gas produced, and new substance is formed?
Balance the chemical equation below.
H2 + O2 ---> H2O
What is...
2H2 + O2 ---> 2H2O
The overall energy change for this reaction.
What is energy is lost?
The energy conversion that takes place during photosynthesis.
What is light energy to chemical energy?
Write an equation that matches the model shown.
**See Model**
What is 2Na + 2HCl ---> 2NaCl + H2 ?