What is a control group?
Control group= used to compare, it is in ‘normal’ conditions
What is the definition of Celsius?
Celsius= temperature scale. Water: freezes at 0ºC and 100ºC.
Calculate: Rise=10m, Run=5s What is the speed?
Speed=Slope=rise/run= 10m/5s = 2m/s
Which substance has the HIGHEST kinetic energy? (solid, liquid, or gas)
gas
How many significant figures are there in this number: 20,080?
4 Significant zeros. Zeros after the last number, do not count!
What Is Scientific Notation form?
a×10b
What is the second step of the Scientific Method?
Research
Significant Figures: How much blue liquid does the beaker contain? AND how many significant figures does this number contain?
43 mL. This is 2 significant figures.
What is the experimental group?
Experimental group= the group you are testing
How many significant figures are there in this number: 2.080?
4 Significant figures. Trailing zeros after a decimal point COUNT!
What is the definition of Absolute Zero?
Absolute Zero= lowest possible temperature, at which thermal energy is as close to zero as it can be, approximately -273ºC.
What is the definition of Archimedes' Principle?
Archimedes' Principle= states that the buoyant force is equal to the weight of the fluid displaced by an object.
What is the definition of null hypothesis?
Null hypothesis= there is not a relationship between what was expected and what was observed
What is the definition of buoyancy?
Buoyancy= the measure of the upward force that a fluid exerts on an object that is submerged.
What are the three types of graphs are useful for scientific data analysis?
Hint: what three types of graphs have we learned about?
Bar graphs, Circle graphs, Line graphs
What is the definition of a hypothesis?
Hypothesis= A hypothesis is based on prior knowledge or experience. there is a relationship (cause and effect).
Convert 250mg to g
Remember: 1g=1000mg
250mg x 1g/1000mg = 0.25g
How many significant figures are there in this number: 2000?
1 significant figure.
What is a conversion?
When you must convert one unit into another unit
What is the definition of density?
Density= mass/volume
Convert: Cupcakes are baked at 30 degree Celsius. What is this value in FAHRENHEIT?
1. F=9/5℃+32 2. F=9/5(30℃)+32= 86F
The specific heat of steel is 470 J/kg/℃. Calculate the amount of heat required to raise the temperature of a 2kg steel block by 100℃.
Thermal Energy= mass x temp x specific heat
Thermal Energy= (2kg)x(100℃)x(470 J/kg/℃)= 94000J
Convert 130 m to cm
Remember: 1 m= 100 cm
130 m x 100 cm/1 m = 13,000 cm
What is the definition of Fahrenheit?
Fahrenheit= temperature scale. Water: freezes at 32 ºF and boils at 212ºF .