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mixturesGas laws States of Matter 10 Point 20 Points 30 Points 40 Points 50 Points 10 Point 20 Points 30 Points 40 Points 50 Points 30 Points 40 Points 50 Points Pure substances Chemical/ Physical Properties
Which of the following IS a physical change? Sawing wood Burning a marshmallow Rusting of a nail
Sawing wood
Which of the following IS a chemical change? Bursting a balloon Boiling water Rotting of an egg
Rotting egg
Give two examples of physical properties
Shape, size, color, flow, phase change
Give two examples of chemical properties
Flammability, ability to rust, corrode, rot
Filtering saltwater is what type of change?
physical
Give an example of a homogeneous mixture
Koolaid, etc.
Chocolate chip cookie dough is an example of what type of mixture?
heterogeneous
Muddy river water is an example of what?
suspension
What are the two types of homogeneous mixtures?
Colloid solution
Give two similarities for homogeneous and heterogeneous mixtures.
Types of matter Mixtures Separated physically 2+ substances
Which of the following is a compound? Hydrogen Water Carbon nitrogen
Water (H 2 O)
What are the two types of pure substances?
Compound Element
An atom of magnesium can be described as what type of pure substance?
element
FREE
Question 4c
How does a compound differ from a mixture?
Can NOT be easily broken down into smaller parts
What law states that as temperature of a gas increases, volume increases?
Charles’s Law
What law states that if the volume of a gas decreases, pressure increases
Boyle’s Law
C. Decrease the volume of the cylinder
A pilot can change the altitude of a hot air balloon by changing the temperature of the gas inside the balloon. Using density, explain how this works.
Hot air has less density than cold air. The lower the density, the more it will rise.
What is the shape and volume of a solid?
Definite shape and volume
What does substance A, B and C represent?
A- Solid B- Liquid D- gas
What is the shape and volume of a liquid?
Shape- indefinite Volume- definite
What is the boiling point of the substance?
100 degrees C
What state of matter is the substance in at 55 oC ?
Liquid
Make your wager
You are testing to see how caffeine effects the heart rate of water flees. Two groups of water flees were tested. Group one received 300mg of caffeine and group two received no caffeine. The water temperature was kept at 20 degrees celcius for both groups. a)Independent variable b)Dependent variable c)Constant d)control
You are testing to see how caffeine effects the heart rate of water flees. Two groups of water flees were tested. Group one received 300mg of caffeine and group two received no caffeine. The water temperature was kept at 20 degrees celcius for both groups. –Independent variable - caffeine –Dependent variable - heartbeat –Constant – water temp, pop size –Control – group 2