Science Review
Why did the bb gas cause the flame to go out?
Because the bb gas is more dense than the air.
Flammability of helium
Upright container- Flame went out Inverted container- Flame stayed lit
How can particles for a new substance be formed from the old particles we started with?
When ingredients are combined, the particles change. the two different types of particles combined will create new particles.
Mixture definition
A blend of two or more substances. Examples: Lemonade, air, bath bomb, e.t.c..
Insoluble definition
A material is insoluble if it can not be dissolved into "something else"
Soluble definition
A material is soluble if it can be dissolved into "something else"
Substance definition
A particular kind of matter having or with uniform properties. Examples: salt, water, sugar, citric acid, baking soda, etc..
What is flammability?
A property of a material that describes how the material interacts with fire. A substance that is flammable can ignite a material at room temperature. Ex that is flammable- paper, hair, e.t.c.
Where does gas come from?
BB had a reaction with the water. Gas was created when BB+water came into contact. Gas comes from fizz and bubbles (that are produced when bb is in water)
Define property
Characteristics of substances that do not change. Examples: Viscosity, odor, color, solubility, texture, s,l, or gas.
Which ingredients are necessary to be in a bb and why?
Citric acid and baking soda, because when combined with water there is a chemical reaction causing fizzing and bubbles.
Definition of density
Density is essentially a measurement of how tightly matter is crammed together.
Scientific principles:
Gas has mass The gas takes up space it is in Gas is a state of matter Gas is matter Gas has the most kinetic energy (particles move the fastest)
What is more dense gas or air?
Gas is more dense than air.
Which possible gases can be produced by bath bombs?
It could be carbon dioxide, argon, and nitrogen because all of these extinguish a flame, and the bath bomb gas extinguished a flame.
Did the mass of the bb change in an opened system?
It did change, meaning air was released when the cap was off.
Physical change:
It doesn't change the way the atoms are linked up. No new substance has been formed, even if it looks different. The chemical properties are not changed. Examples of physical changes: Cutting hair, cutting piece of paper.
What is a chemical equation?
It tells the story of a chemical reaction. It shows which new substances are formed.
Scientific principle of density
Less dense gases float UPWARD when surrounded by MORE dense gases. More dense gases float DOWNWARD when surrounded by LESS dense gases.
What caused the gas bubbles to appear?
The air inside bb breaks apart. The gas is released The bb starts to dissolve, breaks The bath bomb started to fizz Chemical reaction
Chemical change:
The atoms change the way they link up. New substances are formed. The new substances have different chemical properties than the old substance. Energy is always part of a chemical reaction. Energy is either taken in or given off. No elements are lost. No new elements are added. Examples: Paper being burned
Flammability of air
The flame remained lit
Did the mass of the bb change in a closed system?
The mass didn't change, meaning that the gas can't escape if the bb is in a closed system.
What happens to the mass when you open the bag?
The mass didn't change.
What happens to the mass after the bb is crushed?
The mass stays the same. This means that since it was a closed bag no air was released.
Why must there be a combination of substances that produce the bubbles in a bb?
There can only be bubbles/a change in mass when there is a combination of substances because new particles are created with the old particles that are combined.
What happens to the bag when the bb is crushed?
There was no change. The bag didn't release any air.
What happens to bath bombs when they are added to water?
They fizz and bubble. Eventually, they will dissolve. (Solid+liquiz=gas) It doesn't have a definite shape once in the water.
Electrical Energy:
Water added electricity. This is a chemical change. The reactants were 2 H (subscript 2) 0 and the product was 2 H (subscript 2) plus O (subscript 2).
Reactants:
What enters the reaction.
Products:
What is produced from the reaction.
dissolve definition
When a sold dissolves in a liquid, the solid breaks aprart into particles too small to be seen and mixes completely with the liquid.
Thermal Energy:
When water was on a heated hot plate. There was a physical change. The reactants were two H 2 (subscript) O, and it was the same for the product, meaning the atoms didn't change. Amount of particles stayed the same, and the mass stayed the same.
Flammability of bb gas
above- remained lit below- went out
