Atoms and Molecules
The center of the Atom is called this.
What is the Nucleus
During a chemical reaction, the mass of the reactants cannot be ___________ or _____________. This means during the reaction, the mass is ____________.
What is: Created, Destroyed, and Conserved
If you are lifting a ball from the floor to over your head, which of the following are you doing this:
What is increasing the ball's potential or stored energy.
A cannon ball, basketball, and golf ball are rolling down a hill at exactly the same speed. This one has the most kinetic energy
What is the cannon ball
This is the type of energy needed for a person to run up a hill.
What is chemical energy
The negatively charged particles that freely move around the nucleus are called this:
What are electrons.
Nylon is a synthetic material. Which of the following is it MOST LIKELY made of this:
What is: Complex combinations of other synthetic materials
When shooting an arrow, you are increasing this as you pull the string back.
What is the elastic energy
This is the lowest point of potential energy.
What is the maximum point of kinetic energy.
This is the type of energy when a person rests at the top of the hill.
What is potential energy
The center of the atom is composed of two different particles that do not move. These positively and neutrally charged particles are called:
What are (+)protons and (N)neutrons
You are given two different materials that have similar properties and asked to find out if they are the same material. Which 4 of the following characteristics should you check to see if they are the same?
A: Density
B: Color of the flame as they burn (are they flammable?)
C: Melting point
D: How much there is of each sample
E: Color of the material
What is: A,B,C, and E
As the car of a roller coaster rolls down a hill it is increasing in ______A______ as it decreases in _____B______.
What is, A: Kinetic and B: Potential
This is the point on a roller coaster where it is the highest in potential energy.
What is: The highest point on the roller coaster.
This is the type of energy being used as a person runs down a hill.
What is gravitational energy
The Law of Conservation of Matter states this:
What is: Matter cannot be created nor destroyed.
You observe two demonstrations. One is water turning into steam, and the other is wood burning, producing smoke. Which of the following statements best explains your observations.
A: They are both physical reactions
B: They are both physical reactions
C: They are both physical reactions
D: The wood burning is a chemical reaction, and the water boiling is a physical reaction
What is: D
These are the 5 signs a chemical reaction has happened.
What is: Change in color, change in temperature, odor, release of gas, a new substance is formed.
A: parked car
B: boxers fighting
C: desk nailed to the floor
D: feather floating in the wind
What are: B and D
You are observing three different mixtures containing 300 mL of vinegar. You put 5g of baking soda in one, 10g in the second, and 15g in the other. The temperature will drop the mot in this container.
What is the container with 15g of baking soda.
CH4 + 2O2 = CO2 + 2H2O
In the chemical formula above, how does the mass of the reactants relate (or compare) to the mass of the product?
They are the same. The Law of Conservation of Mass tells us that Matter cannot be created or destroyed.
After a campfire fire has gone out, you see the ash and leftover wood. Which of the following is the best conclusion regarding the chemical reaction?
A: Mass is lost, and that is why there is less wood leftover
B: Mass is gained, the ash is heavier than the wood.
C: The mass gets higher as the temperature increases.
D: The total mass of the reaction remains the same, but the mass leaves the wood as smoke.
What is: D
When you break open an ice pack, the temperature drops because of this.
What is an endothermic reaction which absorbs thermal energy.
This is the energy transfer that allows us to hear a tea kettle whistling as it sits on a fire.
What is:
This is the energy transfer that allows us to hear a tea kettle whistling as it sits on a fire.
What is: Chemical energy transferred to thermal energy which heats the water allowing it to boil, which is transferred to sound energy as the steam escapes the tea kettle into the surroundings.