Vocab
A ______________ is the smallest piece of matter that has the properties of an element.
ATOM
How is a substance's chemical energy related to its atomic structure?
Chemical energy is stored in the bonds of atoms and molecules. The way these bonds are arranged is called atomic structure. Energy is needed or released when these bonds are broken or changed.
If I eat different amounts of sugar for breakfast, how will that impact my teeth?
IV = amount of sugar
DV = impact on teeth
What type of food will make someone grow the most?
Eating _________ will make someone grow the most.
Rubber is a bouncy, stretchy polymer made up of many connected smaller molecules. It can be naturally occurring or produced by humans. Which of the following statements best describes the relationship between rubber's structure and its properties?
A. Rubber's properties cause rubber to have the structure that it does.
B. Rubber's structure causes rubber to have the properties that it does.
C. There is no connection between rubber's structure and its properties.
B. Rubber's structure causes rubber to have the properties that it does.
Chemical energy is an example of ______________________ energy because it is energy stored in the bonds holding together atoms and molecules.
POTENTIAL ENERGY
How do scientists use properties to determine whether a chemical reaction has taken place?
Many property changes can signal that a chemical reaction has taken place including bubbles (the formation of a gas), temperature change, color change, volume change, odor change, or formation of a precipitate.
How will different amounts of salt in water change the number of brine shrimp that hatch?
IV = salt in water
DV = shrimp that hatch
How does the amount of Borax in a polymer change its bounciness?
Putting ___________ (more or less) Borax in a polymer will make it (more or less) bouncy.
When vinegar, baking soda, and water are added to powdered milk, a glue is produced. What happened to cause this change?
A. A chemical reaction rearranged the molecules of the vinegar, baking soda, water, and milk to produce a new substance with different properties.
B. A physical change caused the vinegar, baking soda, water, and milk to form glue.
C. The molecules that made up the vinegar, baking soda, water, and milk disappeared and new molecules of glue were created.
A. A chemical reaction rearranged the molecules of the vinegar, baking soda, water, and milk to produce a new substance with different properties.
A reactant has different properties from the product because the atoms of the reactants are rearranged into a new substance in a(n) _______________.
CHEMICAL REACTION
Why is a polymer a kind of molecule? How is it different from a molecule such as water?
A polymer is a long chain of monomers. It is a kind of molecule because it is made up of more than one atom bonded together. This is different than a water molecule because is it in a long chain and is made up of lots of another molecule bonded together.
What will be the impact of withholding affection from rats?
IV = amount of affection
DV = impact on rats
When two substances combine, how do their masses before they are combined compare with their mass after they are combined?
Which of the following statements are true?
A. New atoms are created during chemical reactions, which is how new substances are created.
B. Atoms can be destroyed during a chemical reaction.
C. Whenever atoms interact with one another, no matter how they are arranged, the total mass stays the same.
C. Whenever atoms interact with one another, no matter how they are arranged, the total mass stays the same.
Causing a substance to change state by adding thermal energy to it is an example of a _______________ because it doesn't affect the chemical structure of the substance.
What is conservation of mass?
The notion that mass cannot be created or destroyed; it can be rearranged in a chemical reaction.
What brand of paper towel absorbs the most liquid?
IV = brand of paper towel
DV = amount it absorbs
How does the mass of a marble change its speed after a collision?
After a collision, a marble with less mass will go faster than a marble with more mass.
MOVEMENT BONUS:
If everyone on your team will walk around the room acting like an elephant, you can have the points for this question.
NICE
____________ is the motion of atoms and molecules in a substance as its temperature increases.
THERMAL ENERGY
Responses vary
How does caffeine change your appetite?
IV = amount of caffeine consumed
DV = change in appetite
What type of training will improve your mile time the most?
___________ will improve your mile time the most.
If your group is willing to make a human pyramid, you will earn the points for this question.
THE POINTS ARE STACKING UP!