Mass
What is mass?
Anything that takes up space and has matter (molecules)
What is volume?
the amount of space an object takes up
What is density?
How closely packed together molecules are in an object
Explain the difference between a measurable and observable property.
A measurable property requires tools.
An observable property can be identified by using our 5 senses.
If an object is made out of matter it must have ______________.
a. both mass and volume
b. only mass
c. only volume
d. neither mass nor volume
Both mass and volume
Put the following measurements in order from smallest to largest:
kilogram, milligram, gram
milligram, gram, kilogram
How to we measure volume?
In a measuring container such as a graduated cylinder
What determines if an object floats or sinks in water? Give an example.
the density of an object determines whether it sinks or floats in water.
If an object is more dense than the water, it will sink to the bottom. If an object is less dense than the water, it will float.
Which property stays the same when ice melts into water?
a. mass
b. temperature
c. shape
mass stays the same
Which of the following is an example of a chemical change?
a. Melting ice
b. Boiling water
c. Digesting food
d. Cutting paper
Digesting food
True or false: air is made of mass
true!
42 mL. Always look for the lowest point of the water or the bottom of the meniscus.
What is more dense, a kilogram of gold or a kilogram of feathers?
a kilogram of gold- more compact!
Which property would make a water level rise when a marble is dropped in?
a. mass
b. volume
c. texture
d. color
volume
Explain the difference between a physical change and a chemical change.
A physical change is a change to size, shape and state. No new substance is formed (Ex. cutting an apple, crumbling a paper)
A chemical change forms a new substance (Ex. cooking or burning something)
Mr Stroud put two objects on a balance scale. How can he tell what object is heavier?
whichever object is weighed down to the bottom
The volume of water in a beaker is 25 mL. Ms. Roman drops a button into the beaker and the water rises to 31 mL. What is the volume of the button?
6 mL
31-25=6
How do we measure density?
density = mass/volume
grams
Which of the following is an example of a physical change?
a. Burning wood
b. Rusting of iron
c. Freezing water
Freezing water
Give an example of something that ISNT made of mass
time, light, love, ideas
Ms. Cherepakhov fills a graduated cylinder with 30 mL of water. She drops two magnets into the cylinder, and sees that the water level has risen to 35 mL. How high will the water be if she drops all four magnets into the water?
40 mL
This tells Ms. Smith that the marble is more dense than the water.
What state of matter has no definite shape or volume?
gas
Why is a styrofoam ball less likely to sink in water than a metal ball?
The styrofoam ball is less likely to sink because it is less dense than the metal ball.