Paragraph: (Science-textbook/science-g5-8.txt)
Sent 1: Density is also an important physical property of matter.
Sent 2: The concept of density combines what we know about an objects mass and volume.
Sent 3: Density reflects how closely packed the particles of matter are.
Sent 4: When particles are packed together more tightly, matter is more dense.
Sent 5: Differences in density of matter explain many phenomena.
Sent 6: It explains why helium balloons rise.
Sent 7: It explains why currents such as the Gulf Stream flow through the oceans.
Sent 8: It explains why some things float in or sink.
Sent 9: You can see this in action by pouring vegetable oil into water.
Sent 10: You can see a colorful demonstration in this video.

Question: Do differences in density influence the phenomenon that occurs when pouring vegetable oil into water? (true/0)

No
Yes

Question: What physical property of matter combines what we know about an object's mass and volume? (true/1)

Question: What does density tell? (true/2)

How closely packed the particles of matter are
How big things are
The distance between points
Density combines what we know about an object's mass and volume and reflects how closely packed the particles of matter are
How fast something moves
The area of subjects
What we know about an objects mass and volume

Question: What are three examples of density given in the article? (true/3)

Question: What can density explain? (true/4)

Question: Can the phenomenon of a rising helium balloon be explained by how closely particles are packed within the object? (false/5)

No
Yes

Question: What are some things density explains? (true/6)

Question: Based on the explanation in the article, why do you expect to happen with the water and oil? (true/7)

They will become a solution
One of them will sink and the other rise to the surface based on which one is denser
That they won't combine easily
They will mix easily
They will form a bond
They will make a mixture
The more dense substance will rise

Question: Why is density important? (true/8)

It is a force that inter plays with gravity
It holds shape
When particles are packed together more tightly, matter is more dense and differences in density of matter explain many phenomena
It explains many phenomena
The concept of density combines what we know about an objects mass and volume
It holds things together
It teaches things about nature
It's a physical property of matter

Question: What is density? (true/9)

Electricity
How closely packed the particles of matter are
The weight of an object
The repelling of particles
The conductivity of an object
It is an important physical property of matter that combines what we know about an object's mass and volume. It is how closely packed the particles of matter are

Question: How can I observe the role density plays? (false/10)

By pouring water into ilk
By pouring vegetable oil into water
Watching rocks
Watching the moon
Differences in density of matter explain many phenomena
Watching the stars
By watching the animation or by adding oil to water yourself

Question: How can I understand density? (false/11)

By combining what you know about mass and volume. Simply the more mass in a smaller volume, the more dense
By an objects mass and volume
By listening to friends
By watching things float
By hearing a recording
By watching the environment
You can see a colorful demonstration in this video