Changes
Which of the following is an example of a chemical change: splitting wood, melting ice, burning wood or dissolving salt in water.
Burning Wood
A compound containing Carbon and Hydrogen reacts with Oxygen to create water vapor, Carbon Dioxide, and heat.
Combustion
The atomic number of an element is the number of its __________.
Protons
What happens when a bath bomb is added to water?
Makes a gas or a chemical reaction
Can you eat in a Science classroom?
No
Changes in texture, bending, tearing, melting, boiling, dissolving are all signs of this.
Physical change
What type of reaction is the below
Acid + Base
Neutralization
The charge of a Proton is
Positive
Is a physical change reversible?
Yes
True or False: You can throw paper airplanes in a Science Classroom.
False
The process in which the building blocks of matter (atoms) are rearranged to produce different substances.
Chemical reaction
A reaction when a compound breaks down into simpler ones.
Decomposition
The charge of an electron is
Negative
Cooking, precipitate forms, bubbles occur, formation of gases, temperature changes, corrosion, tarnishing are all signs of a
Chemical Change
Do you put your trash in the classroom sink or the garbage can?
Garbage Can
This type of change occurs when a substance or multiple substances rearrange and a new substance is created.
Chemical Change
A reaction where a PURE element switches places with an element in a compound.
Single Displacement
What is the center of an atom called?
Nucleus
In what type of reaction does burning / oxidation occur?
Combustion
State the Law of Conservation of Mass.
Mass can not be created nor destroyed.
Give three examples that a chemical change has taken place.
Temp. change, color change, odor change, formation of a precipitate, formation of a gas, creation of heat or light.
What kind of reaction is it when
2Na + Cl2 Becomes 2NaCl
Synthesis.
All parts of the atom have a mass of about 1 except for
Electrons
What kind of reaction is... a new odor from a gallon of milk ... A color change that occurs when two clear liquids mix... Baking powder and water bubble and fizz...
Chemical reaction
In a chemical reaction does the total number of ATOMS change?
No