Balancing Chemical Equations
What side of the equation are reactants on?
What side of the equation are products on?
Reactants are on the left side
Products are on the right side
Is an exothermic reaction hot or cold?
hot; the reaction releases heat to the surroundings causing the system and surroundings to warm
What is a synthetic resource?
A material that is man made in a factory or lab.
What is potential energy?
Energy that is stored; usually no movement.
Molecules are formed when two or more ___________ are held together by chemical bonds.
Molecules are formed when two or more atoms are held together by chemical bonds.
What are reactants?
What are products?
Reactants are the materials that go into a chemical reaction and are changed
Products are the result of a chemical reaction (the final product)
Does an endothermic reaction feel hot or cold?
Give an example of an endothermic reaction.
Endothermic reactions feel cold; they absorb heat from the surroundings.
An example of an endothermic reaction is an insulated coffee mug.
What is a natural resource?
Give an example of a natural resource?
A natural resource is something that is made or found in nature.
Examples of natural resources would be water, sun, trees, or fruits.
What is kinetic energy?
Give an example of kinetic energy?
Kinetic energy is energy in motion; moving.
An example of kinetic energy is a plane flying through the air.
Linear molecular structures are defined by what angle?
180 degrees
What does the law of conservation state?
Matter cannot be created or destroyed, but it can be rearranged
If we were trying to heat up food using a chemical reaction, would the reaction need to absorb or release energy? Explain your answer.
Would a christmas tree purchased at Target be an example of a natural or synthetic resource?
A synthetic resource because it is a tree, but it is not naturally grown.
Is a stretched rubber band an example of potential or kinetic energy? Explain your answer.
A stretched rubber band is an example of potential energy because the energy is stored in the rubber band waiting to be released, which would cause it to fly through the air.
If a molecular structure has a continuing pattern, it is considered an extended structure. In an extended structure, the atoms __________.
If a molecular structure has a continuing pattern, it is considered an extended structure. In an extended structure, the atoms repeat.
If the reactant materials weigh 89.5 grams, how much do the product materials have to way to follow the law of conservation of matter?
89.5 grams; matter cannot be created or destroyed
How are the particles moving in a reaction that is hot?
What does it mean if a resource is renewable?
Are renewable resources normally natural or synthetic?
It means that more of that resource can be made if it runs out.
Renewable resources are normally synthetic.
As an object falls, its ______________ energy is transformed into __________ energy.
As an object falls, its potential energy is transformed into kinetic energy.
What does the molecular structure of atoms within a molecule determine about a substance?
Determines the substances physical and chemical properties.
If the reactants side of an equation has 15 atoms and the products side has 18, does this equation follow the law of conservation of matter? Why or why not?
No, it does not follow the law of conservation of matter because to be balanced, the reactants and products side of the equation need to have the same number of atoms on each.
How are the particles moving in a reaction that is cold?
Give an example of an exothermic reaction.
The particles are close together and barely moving.
An example of an exothermic reaction is an MRE, rusting, fires, and combustion.
What does it mean if a resource is non-renewable?
Give an example of a non-renewable resource.
If a resource is non-renewable it means that once we use all of the resource, we cannot make more.
An example of a non-renewable resource is fossil fuels.
Do you think an object with a hotter or colder temperature has higher kinetic energy? Explain your answer.
An object that is hotter would have a higher kinetic energy because particles in a heated object move fast, therefore an object that is hot would have more kinetic energy than an object that is warm, room temperature, or cold.
What type of bonds hold together atoms?