Vocabulary
Define Mass
The amount of matter in an object
is any factor, trait or condition that can exist in an experiment
variable
What is units of volume?
cm3
Was Albert Einstein A physicist?
Yes
What is the formula for Density?
Density = Mass / Volume
What is the amount of space matter occupies?
Volume
What is being measured in an experiment?
Dependent Variable
What are units of mass?
G/g/grams
Who discovered physics?
Galileo Galilei
A liquid has a mass of 60 grams and volume of 30 mL, what is the density of the liquid?
2.0 g/mL
Define Density
The amount of matter in a. given volume.
What is be changed between trials in an experiment?
Independent Variable
What is liquid volume?
mL (milliliters)
Who discovered gravity?
Sir Isaac Newton
Brick has a mass of 6,000 grams and a volume of 2,000 cm3.
3.00g/cm3
What is Hypothesis?
An idea or explanation that you then test through study and experimentation "an educated guess."
A basketball coach thinks that a protein bar will increase the points his team scores. He splits his team into two groups of equal players. Half the team eats a protein bar for one week right before a game the other half does not eat the protein bar at all. He records his results. Which part is independent variable? which part is dependent variable?
Ind. Variable is eating protein bars
Dep. Variable is the points the team scores
What is g/mL or g/cm3?
Density Units
What fell for Sir Isaac Newton to discover the gravity?
An Apple
A metal has a volume of 15cm3 and density of 3.0g/cm3. What is the mass of the metal?
45 grams
The information collected using specific methods for a specific purpose of studying or analyzing
Data
Jadiel wants to determine the effect of fertilizer on the growth of grass.
What is the independent and dependent variables?
Ind. Variable: Fertilizer
Dep. Variable: Growth of grass
The base unit for temperature
Kelvin
What early scientist wrote about optics and the camera obscura during the Islamic Golden Age?
Who is Ibn al-Haytham
Volume = _____________ x Width x ____________
Length and height
What force keeps the planets in orbit around the sun?
Gravity
A student is testing which type of battery brand lasts the longest in a flashlight. He tries three different brands and times how long each one keeps the light on.
Independent Variable: Battery brand/type
Dependent Variable: How long the flashlight stays on (battery life)
Scientists use a set of measuring units called.....
"SI" or the International System of Units"
What is Principia Mathematica?
Sir Isaac Newton's Famous Book
A student drops a rock into a graduated cylinder filled with 40 mL of water.
After the rock is added, the water rises to 55 mL.
The rock’s mass is 30 g.
What is the volume of the rock?
What is the density of the rock?
Initial volume = 40 mL
Final volume = 55 mL
Volume of rock = 55 − 40 = 15 mL
Mass = 30 g
Density = mass / volume = 30 g ÷ 15 mL
30 ÷ 15 = 2.0
Density = 2.00 g/mL
method used to find the volume of an irregularly shaped object by seeing how much water it pushes out of the way when submerged.
Water Displacement
A student eats snacks with different amounts of sugar before running a race.
Independent Variable: Amount of sugar in the snack
Dependent Variable: How long the student can run before getting tired
This is an instrument that measures temperature or how hot an object is.
Thermometer
Newton’s laws helped develop what branch of mathematics used to describe motion?
Calculus
A metal bolt has a mass of 45 g.
When placed in a cylinder of water, the level rises from 25 mL to 35 mL.
Questions:
What is the volume of the bolt?
What is its density?
Would this object sink or float in water?
Initial volume = 25 mL
Final volume = 35 mL
Volume of bolt = 35 − 25 = 10 mL
Mass = 45 g
Density = 45 g ÷ 10 mL
45 ÷ 10 = 4.5
Density = 4.50 g/mL
Sink or float?
Since density (4.50 g/mL) > density of water (1.00 g/mL), the bolt will sink.
If plants get more sunlight, then they will grow taller. Is the hypothesis good or bad?
good
The base unit for time
seconds
What area of physics studies heat, work, and energy
Thermodynamics
A science student has a chunk of mystery metal.
It weighs 540 g.
When dropped into a container, the water level rises from 200 mL to 270 mL.
Questions:
Find the volume of the metal.
Find its density.
Compare it to these densities and decide what it could be:
Aluminum = 2.7 g/mL
Iron = 7.8 g/mL
Copper = 8.9 g/mL
Lead = 11.3 g/mL
Initial volume = 200 mL
Final volume = 270 mL
Volume of metal = 270 − 200 = 70 mL
Mass = 540 g
Density = 540 g ÷ 70 mL
70 × 7 = 490 (remainder 50) → 50/70 ≈ 0.7142857...
540 ÷ 70 ≈ 7.7142857... → round to 7.71 g/mL
Compare to known densities:
Aluminum = 2.7 g/mL
Iron = 7.8 g/mL
Copper = 8.9 g/mL
Lead = 11.3 g/mL
Likely identity:
7.71 g/mL is very close to iron (7.8 g/mL) → Most likely: iron (or an iron alloy).
Plants like the sun a lot.
Is the hypothesis good or bad?
Bad
SI unit you would use to measure the distance from your house to school
Kilometers
Who developed the theory of relativity?
Albert Einstein
A pencil is floating in liquid A. Another pencil (of the same volume and mass) has sunk in liquid B. Use terms density to make a comparison between liquid B and A.
Liquid B must be less dense than liquid A.
I think music is cool for plants.
Is the hypothesis good or bad?
Bad
Why do Scientists prefer use metric Unit, not Imperial units?
Scientists prefer using the metric system instead of the imperial system because it’s easier, consistent, and universal.
What does the Hubble telescope help scientists study?
Distant galaxies, nebulae, and the expanding universe.
You have a slice of pizza. You take a few bites of the slice of pizza. Did the density of the pizza change?
No, the mass changed because you ate it and the volume changed because you ate it. BUT that keeps the density the same.