Chemical Change
Which one is not a chemical change? Gas is created, Heat increases, Something is Chopped.
Something is chopped
Which one is not a physical change?
Using food coloring, Heating something up with fire, Boiling water, Gas bubbles are formed from mixing two substances.
Gas bubbles are formed from mixing two substances
What is a chemical reaction ?
It is the process in which one or more substances ( reactants ) are converted into one or more substances ( products ).
What is a chemical equation?
A chemical equation is a symbolic representation of a chemical reaction in form of symbols
What is photosynthesis?
The process by which plants and other organisms use sunlight, water and carbon dioxide to transform it into oxygen and use it as a fuel.
What chemical change can be a physical change to? Color change, Gas created, or Something Rotting.
Color change
Which one is a physical change?
Melting ice, Chopping wood, Breaking glass, Dissolving sugar in water.
All of them
Is photosynthesis an example of a chemical reaction ?
Yes
What is a subscript in a chemical equation?
A subscript is the small number that represents the number of atoms
What is the role of chlorophyll?
Chlorophyll inside of the cells trap the sun’s light to start the photosynthesis process.
Write one type of Chemical change
Burning log, gas is created, solid is created, temperature change etc
What is a physical change?
When only the physical properties of something changes without changing the chemical properties.
List 3 examples of chemical reactions in our daily life
Combustion, rust, digestion, photosynthesis, batteries, fermentation, washing and baking. etc
What is a coefficient in a chemical equation?
A coefficient is the large number that represents the number of molecules
How does carbon dioxide and water react in photosynthesis?
Water and carbon dioxide react to form glucose and oxygen
Write 2 types of Chemical change
Burning log, gas is created, a precipitate, temperature change etc
Is freezing water a chemical or physical change?
Yes it is a physical change
What is the difference between a chemical reaction and a physical change ?
The difference is that in a chemical reaction there is a change in the composition of the substance, in a physical change there is a difference in the temperature, smell, appearance, color.
What is the left side of an equation called?
Reactants
What does sugar provide in photosynthesis?
Sugar supports a plant’s transpiration and respiration.
Write 3 types of Chemical change
Burning log, gas is created, precipitate is created, temperature change etc.
Is a popsicle melting a physical change?
Yes
List 3 examples of different types of chemical reactions
Decomposition reaction, combination reaction, combustion reaction, neutralization reaction, single displacement reaction, double displacement reaction, precipitation reaction or redox reaction. etc
Is this equation balanced or unbalanced? “2H2 + O2 —> 2H2O”
Balanced equation
What is the difference between an autotroph and a heterotroph?
Autotrophs produce their own food and heterotrophs do not and instead they consume from other organisms.