Name:
02/17/22
1.
Learning Check: Matter
A cup of gold-colored metal beads was measured to have a mass of 425 grams. By
water displacement, the volume of the beads was calculated to be 48.0 cm3. Given
the following densities, identify the metal. Show work
Gold: 19.3 g/mL
Copper: 8.86 g/mL
Bronze: 9.87 g/mL
2. What is the volume of the toy dinosaur?
3. A little aluminum boat (mass of 14.50 g) has a volume of 450.00 cm3. The boat is
placed in a small pool of water and carefully filled with pennies. If each penny has
a mass of 2.50 g, how many pennies can be added to the boat before it sinks?
Show work
Name:
02/17/22
Learning Check: Matter
4. What do the circles and lines tell you about the arrangement, spacing, and speed
of water molecules in room temperature water?
Make a drawing that shows the molecules of ice.
5.
Compare the molecules of water in different states & fill in the rest of the table
below:
ICE
SPEED OF
MOLECULES
WATER
WATER VAPOR
SLOWER
AMOUNT OF
MOVEMENT
can bounce off each
other
ARRANGEMENT OF
MOLECULES
RANDOM
DISTANCE
BETWEEN
MOLECULES
CLOSE TOGETHER
Name:
02/17/22
Learning Check: Matter
6. Jacob, a landscaper, wondered if a particular tree would grow better in the sun or in the
shade. Without collecting information or doing much research, Jacob claimed that if he could
limit the amount of sunlight the tree was exposed to, then the tree would grow taller. To test
this idea, Jacob planted 10 trees in a shady area and 10 trees in an area with a significant
amount of sunlight. Over the next several months, Jacob watered and fertilized each tree in
the exact same way. He also took measurements of the tree’s height and averaged them.
a. Write a testable question based on Jacob’s investigation.
b. Highlight Jacob’s prediction in the story above.
c. Identify the variables in the table below.
Variable
Independent
Dependent
Constant [at least 2]
Name the variable:
Explain your reason for
your choice:
Name:
02/17/22
Learning Check: Matter
7. Two students wanted to determine the exact temperature at which water boils. They filled a
flask with 243.7 grams of water and placed a thermometer inside to measure the
temperature, which was 250C. While observing the flask carefully, they noticed that at 1000C
the water reached a rolling boil and water vapor formed.
a. In the space below, draw a particle diagram of the water temperature at 250 C and
of the water vapor.
Water at room temperature [250 C]
Water Vapor
b. The diagram below shows the mass [grams] of water before and after boiling, on a
digital scale.
Explain why the mass reading changes and whether this change obeys the law of
the conservation of mass.
Name:
02/17/22
Learning Check: Matter
8. In figure 4 below, a graph shows the relationship between mass and volume for two
substances: A and B. Use the graph to answer questions about these two substances. There is
also a diagram of a two-pan balance, this diagram should be helpful when answering
questions a and c.
a.
Using the information in the graph, calculate the density of substance A. Use the 3
step method and show your work below.
Name:
02/17/22
b.
Learning Check: Matter
Using the information in the graph, calculate the density of substance B. Use the 3
step method and show your work below.
You have built a simple two-pan balance shown in figure 3 to compare the masses of
substances A and B.
c. What would happen if you put equal volumes of A and B in the two pans?
d. Explain your reasoning for the above answer [c].
e. Water has a density of 1.00g/mL. Sketch a line representing water on the graph in
figure 4.
f. Would either of these substances [A or B] float in water? Explain your answer
Name:
02/17/22
Learning Check: Matter
g. Density is a property of matter. In your own words, what does this statement mean?
h. BONUS: If you put 10.0mL of A in one balance pan, what mass of B would you need in
the pan to make it balance? *