It keeps all other factors the same while testing the variables.
100
On what axis do I graph my independent variable and my dependent variable?
Independent on the x axis and dependent on the y axis
100
Are phase changes physical or chemical properties?
They are physical properties.
100
What are the 3 states of matter?
Solid, Liquid, Gas
100
What are the charges of the following 3 subatomic particles: proton, electron, neutron
proton: positive
electron: negative
neutron: no charge
200
What is the difference between an independent variable and a dependent variable?
An independent variable is the cause while the dependent variable is the effect of an experiment.
200
When do I make a line graph?
When there is a change over time
200
Is burning a piece of wood a physical or chemical change? Why?
It is a chemical change because the wood is changing into something new.
200
If I start with a solid and end with a liquid, what phase change has just occurred?
melting
200
What subatomic particles are found in the nucleus?
Protons and neutrons
300
If I were to measure the speed of a runner at different times during a race, what would be the independent and dependent variables?
The independent variable is the time and the dependent variable is the speed of the runner.
300
If I am measuring the speed of 5 different cars, should I create a line graph or a bar graph. Why?
A bar graph because we are measuring different quantities and there is no change over time.
300
What is a way to know that a chemical reaction has occurred?
A gas is produced, there is a color change, a precipitate (solid) is formed
300
What phase change occurs if I start with a liquid and lose energy (release heat)?
freezing
300
What is the difference between an electron and a valence electron?
Valence electrons are electrons found on the outermost energy shell of an atom.
400
If I was testing the effect of sunlight on a plant's growth, what are two things I should keep constant?
Amount of water, type of plant, size of pot, time of watering, amount of soil.
400
What are the 6 things I need for a perfect graph?
Title, proper scale of x axis, proper scale of y axis, labeled x axis, labeled y axis, plotted points
400
Name 3 physical properties.
malleability, conductivity, hardness, density, volume, color, mass
400
What is the difference between endothermic and exothermic?
Endothermic is when heat is being absorbed (gain heat), while exothermic is when heat is being released (lose heat).
400
How many protons, neutrons, and electrons are there in an element with an atomic number of 14 and an atomic mass of 30?
There are 14 protons, 16 neutrons, and 14 electrons
500
What conclusion (relationship) can I make from the following data testing the temperature of water at different times:
0 min-20 degrees C
5 min-40 degrees C
10 min-55 degrees C
15 min-78 degrees C
As the time increases, the temperature increases.
500
On the whiteboard, create a graph for the following data measuring the price of a hamburger in 5 different states:
Connecticut- $3.50
New York- $4.00
Massachusetts- $2.00
California- $3.50
Pennsylvania- $2.00
A bar graph should be on the board with all 6 criteria needed
500
If I am boiling water and I see steam, is that a physical change or a chemical change? Why?
This is a physical change because the steam is still water. It is just in a gas state.
500
What happens to the temperature during a phase change?
The temperature remains the same
500
On the whiteboard, draw a complete Bohr diagram for an element with an atomic number of 11 and an atomic mass number of 23.
There should be 11 protons, 12 neutrons in the nucleus. A total of 3 energy levels are needed to fill 11 electrons.