Solubility
What is solubility?
The ability of a substance to mix in with a liquid (usually water)
If something that does not mix in with water (ex chalk) it is not soluble.
a cube has a mass of 50 grams and a volume of 10 cm3. What is it's density?
5 g/cm3
What is the variable that we test (changed by scientists) in an experiment
independent variable
What does a geologist study?
What is called when a substance turns from a solid into a liquid?
melting point
If 10 g of salt dissolves in 100 ml of water at 20 degrees celcius. Is the salt soluable or insoluable?
Soluable
What is the density formula?
Density= mass/ volume
Which variable is what we measure also known as the outcome variable?
dependent variable
What type of scientist studies properties of elements like oxygen and iron?
chemists
Think back to our demonstration lab, what is an example of something with high thermal conductivity?
metal (Cu and Al)
What can increase solubility?
Increasing temperature
Gold has a density of 19.3 g/cm3. I have a golden ring and gold chain necklace. Which has a higher density?
neither, they have the same density
Mrs. King wants to see how pepper plants will grow with different liquids. She uses water, diet coke, normal coke and milk. What is the control variable?
the water
Which scientific study focuses on living organisms?
Biology
I am trying to study the migration habits of butterflies. Would it be best to complete a field study or in the lab?
field study
Chalk, baking soda and sand are all ....
insoluble
A liquid has a density of 0.8g/ml and water has a density of 1.0 g/ml. Will this object sink or float in water?
float
Mrs. King wants to see how pepper plants will grow with different liquids. She uses water, diet coke, normal coke and milk. What is the independent and dependent variable?
Independent variable is the different types of liquid and the dependent variable is how high the pepper pants grow.
What to astronomers study?
stars and planets
I want to track how alligators and pythons interact in the everglades. Would it be best to complete this study in the lab or in the field?
field
What will happen to a solubility experiment when you increase how fast you stir and the temperature of the water?
It will increase the rate of solubility
The higher the density (largest number) the more likely it will (sink or float)?
sink
Shelby wonders how different temperature of water affects the solubility of salt. What is the independent, dependent and control variables?
control: room temp water
independent: temperatures of water
dependent: how quickly the salt dissolves
How are all scientists similar?
They want to explain the natural world
If I have a mystery substance that I know is a pure substance list at least 3 ways I can identify what it is?
density, solubility, magnetism, thermal conductivity, electrical conductivity, melting point, boiling point