Solids, Liquids and Gas
Volume
Density and viscosity
Mixtures and solutions
Physical and Chemical Changes
100
Can matter be destroyed?
No, it just changes form.
100
Does gas have volume? explain why or why not
Yes gas has volume, it takes up space. One example is gas filling up a balloon.
100
What is viscocity?
Name a liquid that has high viscocity and a liquid that has low viscosity.
The flow rate of a liquid.
high viscosity - honey
Low viscosity - water
100
What is the difference between a mixture and a solution?
In a mixture, substances are generally just mixed and are not completely dissolved. In a solution, substances are dissolved completely and they cannot be filtered out.
100
When a leaf changes color is it a chemical change or a physical change?
Chemical change... this happens because of the change in temperatures in the atmosphere during the fall season.
200
Jennifer boils water and salt together. Afer she turns the stove off and the water has cooled, she notices that the volume has decreased. She thinks that some of the matter in the solution disappeared when it was heated. Is Jennifer correct?
The volume has decreased, however, the matter has not disappeared. It has just changed form from a liquid to a gas.
200
Explain the water displacement method.
You put a specific amount of water in a cylinder or other container. When you place the object in the water, the water will be displaced and it will move up. The amount of water that is displaced is the volume of the object.
200
Why did some of the liquids never separate in our density tower?
The density of those liquids was identical or very close.
200
Give two examples of mixtures
possible examples:
trail mix
fruit salad
200
What type of change is a rotten banana?
A chemical change.
300
When we boiled water in class we saw that the water was turning to steam. What is this process called?
Evaporation
300
What is the formula for volume of a rectangular prism?
length x width x height
300
Which has greater density vegetable oil or water? How do you know?
Water has greater density because the vegetable oil floats on top.
300
Give two examples of solutions
Coca Cola
Coffee
Lemonade
300
Give a definition and an example of a chemical change.
A chemical change is when new matter is created and it is not reversible. An example is a rusty nail.
400
What is one way you could demonstrate the movement of gas particles?
Squeezing a balloon
400
How could you find the volume of a cereal box?
You would need a ruler to measure Length x width x height.
400
If you had honey, oil and water in a cylinder, how would they appear in layers in a density tower?
Honey on the bottom, water in the middle, oil on top.
400
The two parts of a solution are called...
The solute (the substance that is being dissolved)
The solvent (the liquid that is doing the dissolving)
400
What is the definition of a physical change? Give one example.
A change that occurs and does not create new matter. An example is a crushed can.
500
Draw a Diagram to show the particles of a solid, liquid and a gas
500
You want to find the volume of a rock. How could you find the volume?
Water displacement method.
500
What is the formula for density?
Density = Mass/ volume
500
You have two clear liquids that look exactly the same, however, your teacher explains that they are actually different liquids. What could you do to identify the liquids?
Boiling point
Freezing point
solubility
density
viscosity
temperature
volume
Mass
500
Name two changes that occur when you bake a cake
possible answers:
Chemical change - the actual baking
Physical change- mixing the dry ingredients together