Why does it MATTER?
The Law of Conservation of Matter states...
Matter cannot be created or destroyed, only changed
What is the vocabulary word for the chemicals that go into a chemical reaction?
reactants!
David pushed an object with 10 Newtons of force to the left. Sarah pushed the same object with 3 Newtons of force to the right. What is the net force on the object?
7 Newtons
see drawing
How can you find acceleration?
A= F/M
If the reactants of an equation have a mass of 60 grams, what should the mass of the products be?
60 grams
What is the element symbol for sodium?
NA
How can the mass of an object affect it's acceleration, when the force applied stays constant?
More mass means that the object will accelerate less
What energy transformation occurs when a battery powers a light?
chemical to electric
How do you calculate average speed?
total distance/total time
What are the signs of a chemical reaction?
CGLTPO
What are products?
What is the law of inertia?
BONUS: which of Newton's laws is this?
an object an rest will stay at rest unless acted on by an unbalanced force
an object in motion will stay in motion unless acted on by an unbalanced force
What energy transformation occurs when a wind turbine powers a home?
Mechanical to Electrical
Explain the transfer of energy that occurs in a food web or an energy pyramid?
Each level gains energy energy from the level below. 10 percent of the energy moves up and the other 90 percent is released as heat.
Does the equation show conservation of matter?
2H2 +O2 ---> 2H2O
Bonus 100: Why?
No, because there is a missing Oxygen atom in the products.
How many total atoms are in the following formula?
CH₂O
4 total
1 carbon
2 hydrogen
1 oxygen
If the force on an object goes up, while mass stays constant, what happens to the acceleration?
the acceleration will increase
The height of a wave is called _______________. When it is __________ there is more energy present.
Amplitude, taller
A 10 kg object accelerates at 2 m/s^2. What force acts on the object?
20 newtons
Sally is investigating conservation of mass.
She mixed 5 grams of sodium bicarbonate with an unknown amount of vinegar.
The chemicals fizzed and produced 1 gram of carbon dioxide gas, 5 grams of sodium acetate, and 2 grams of water.
What was the mass of the vinegar used at the beginning?
3 grams
1+5+2=8
8-5=3
What elements are present in the following formula?
NaHCO₃
Sodium-NA
Hydrogen-H
Carbon-C
Oxygen-O
Explain all three of Newton's laws in the following scenario
A rocket launch
1. It is at rest until an unbalanced force acts on it
2. The mass of the rocket and the force affect the acceleration into the air
3. The action of the fuel makes the rocket react and move upward
If wavelength goes up, what happens to frequency?
frequency will decrease, this is an inverse relationship
BONUS 100: Where can you find Metalloids on the periodic table?
Answers vary