Fair Tests
True or False: It is possible change multiple conditions while keeping an experiment fair
False: You need to keep all conditions the same while only changing one condition
Is air matter?
Yes
List the 3 states of matter
1. Solid
2. Liquid
3. Gas
True or False: Mixtures are made up of 2 or more substances that are physically combined and can be seperated
True
Name the 2 variables to perform a fair test
Control & Independent Variable
True or False: during a thunderstorm, lightning & thunder is matter
False: Lightning and Thunder are not matter
True or False: You can heat up a gas to change it into a liquid
False, you need to cool down a gas to turn into a liquid
True or False: Solutions are a type of mixture
True, solutions is a special case where one substance gets broken down into smaller pieces that it can't be seen anymore
What is a control variable?
Control variables are conditions that need to be kept the same in order to conduct a fair experiment
Matter is something with ______ and ______ . (150 points each)
Mass & Volume
Name the 3 characteristics of a liquid (100 points for each correct):
(Hint: Shape, Volume, Movement)
Liquids have: no fixed shape, a fixed volume and is free to move
In an experiment, we dissolve salt into a cup of water to create salt water mixture. Name the solute, solvent and solution in this example (100 points for each correct)
Solute: Salt
Solvent: Water
Solution: Salt Water
Independent variables is the condition you change within the fair experiment
What is the smallest unit of matter?
Particles
Which process causes steam or water vapour to stick onto cool surfaces like glass?
Condensation or Condensing
We find that salt dissolves easily in water, while oil does not, this means that salt is _______ in water, while oil is in _______ water. (200 points each)
Soluble & Insoluble
Jenny placed her plant in her closet and poured 2 cups of water everyday; Tom placed his plant on his balcony and poured 1 cup of water everyday. At the end of the month they compared their results and Tom's plant grew bigger than Jenny's, they concluded that you need to use less water to grow a bigger plant.
Is this test fair? Why?
It is not fair, because the plants were not placed in the same environment, and they used different amounts of water, this means there were 2 independent variables, which is not fair
Which of the following is matter or not matter (100 points for each correct):
1. Apple
2. Time
3. Sun
4. Water
5. Gravity
Apple, Sun & Water are matter
Time and Gravity are not matter
The temperature that a substance changes between a solid and liquid is called the ________ or ________ point.
The temperature that a substance changes between a liquid and gas is called the ________ or ________ point.
(100 points each, bonus 100 points for all correct)
Melting or Freezing Point
Boiling or Condensing Point
In order to separate sand from water, we can use a filtration method, however what method do we need to use to separate salt from salt water?
Salt can be extracted from water through evaporation by heating the solution.