Formula & Units
What's the formula for density?
Density = Mass ÷ Volume
What piece of equipment is used to measure liquid volume?
(Graduated) cylinder
Why does ice float on water?
Ice is less dense than liquid water.
A block has mass 50 g and volume 25 cm³. What is its density?
2 g/cm³.
True or False: A small object always has less density than a large one.
False
which is more dense, oil or water?
What equipment would we use to measure the mass of an object?
Scale or Mass balance
Why does a ship made of steel float?
Its overall density (hull + air inside) is less than water.
A liquid has mass 120 g and volume 150 cm³. Find its density.
0.8 g/cm³.
Which is denser: Eugene's school bus filled with students or empty?
Filled with students (more mass, same volume).
What does density mean if we talk about atoms in an object?
Tight packed atoms = more density
Loosely packed atoms = less dense
Between water, oil and syrup, which one sinks to the bottom?
syrup
If an object has a lower density than the substance it is in, it will _______
Float
Which country has the most volcanoes in the world?
A. Japan
B. Indonesia
C. Iceland
D. Greece
Indonesia
Who currently has the most followers on Instagram among individual people?
A. Lionel Messi
B. Cristiano Ronaldo
C. Selena Gomez
D. Taylor Swift
Christiano Ronaldo
syrup
Tightly packed atoms in liquid means it will....
be more dense and sink more
If an object has a greater density than the substance it is in, it will _______
Sink
Which planet has the shortest year because it travels around the Sun faster than any other planet?
A. Venus
B. Earth
C. Mercury
D. Mars
Mercury
How many Thai baht is 1 American dollar?
32 or 33 baht
What is the formula for volume?
L X W X H
What is the definition of density?
Density is how tightly packed atoms are in an object.
What two things do we need to calculate density?
mass and volume.
What is the smallest country in the world?
Vatican city
Who has the most followers on X? (twitter)
Elon Musk