Matter Review
1. What should you always do before beginning an experiment?
Before starting an experiment you should always make sure you have understand all of the directions and
check all of your equipment.
2. Imagine you are a body of water. Describe the journey you would take from being a gas, to becoming
a liquid, and then ultimately a solid.
A puddle of water evaporates into a gas then comes down as liquid rain, then is frozen over into a solid.
3. List two mixtures that could be separated with a magnet.
Sand & Iron
Salt & Nickel
4. What happens when you mix oil and water?
The oil always floats on top of the water because the oil is less dense than the water.
5. What temperature does water boil at? 100 °C
6. What temperature does water freeze/melt at? 0 °C
7. What happens after water reaches its boiling point?
After water reaches its boiling point, it evaporates into a gas.
8. Describe a solid in as many ways as you can. (use your notes)
Definite Volume, Definite Shape, Definite Mass. Solid particles are vibrating a tiny bit. Particles are very
tightly packed. They do not change shape when placed in a container.
9. Describe a liquid in as many ways as you can. (use your notes)
Definite Volume, No Definite Shape, Definite Mass. Liquid particles move around in medium speed. Particles
are loosely packed. They tend to take the shape of the container they are poured into.
10. Describe a gas in as many ways as you can. (use your notes)
No Definite Volume, No Definite Shape, No Definite Mass. Gas particles spread out to the biggest space
possible. Particles are very loosely packed. They spread out in the whole container that they are poured
into.
11. Name the three ways that were used in class to separate mixtures and solutions.
1.
Magnets
2. Filtering/Sifting
3. Evaporation
12. A student places a thermometer in a beaker of water. The temperature reads 35 °C. How many
degrees would the temperature need to drop to reach its freezing point?
35 °C
13. From the video we watched, why did one egg float, another egg sink, and the third float in the middle?
The density of the water changed the way the egg could float. In water without salt the egg sank because it
was more dense than the water, but when we added salt to the water we changed the density of the water.
This caused the egg to float in the salt water because the density of the water was now more than the
density of the egg. In the last example the salt water was more dense than the plain water, so the plain
water sat on top of the salt water; because the egg was less dense than the salt water, but more dense than
the plain water it sat in the middle.
14. In the Colorful Columns lab what would have happened if we would have waited a few hours after
shaking up the graduated cylinder and mixing all the liquids together?
After mixing all the liquids together they would eventually settle back in order with the least dense on top
and most dense on bottom.
15. Less Dense Objects/Liquids
Rise
. More Dense Objects/Liquids
Sink
.
16. What is a mixture:
A combination of two or more substances that do not form a new substance, and can easily be separated.
17. What is a solution:
A type of mixture where one substance is spread out evenly over another substance, and is more difficult to
separate.
18. From the Lab, Solids Liquids Solutions OH MY, what ingredients kept their original properties when
mixed?
a. Solid & Solid: Baking Soda, Soap
b. Liquid & Liquid: Water, Vinigar
c. Solid & Liquid: Sand, Water
19. Julie placed a cookie on one triple beam balance and a candy corn on another triple beam balance.
What was the total mass of both the cookie and the candy corn?
Answer:
300g + 40g + 2.1g = 342.1g
0g + 0g + 6.0g = 6.0g
342.1g + 6.0g = 348.1g
20. Sam has two graduated cylinders. He wants to find the difference between the two
graduated cylinders of water.
What is the difference between the two graduated cylinders of water?
Answer: 32mL – 12mL= 20mL