Physical Properties
Density
Temperature
Mixtures & Solutions
Vocabulary
100

A student makes a solution by mixing a flavored, powdered drink mix into water. Some physical properties of the water will change after the drink mix dissolves. Which physical property of the water will remain the same?

temperature

100
What is density?
Physical property of substances which determines if it will sink or float.
100
What is the boiling point of water?
The boiling point of water is 100°C.
100

What is the best way to separate a mixture of water and sand?

Filter

100
Condensation
is the physical change in matter from a liquid to a gas
200

Matter can be classified based on physical properties, including solubility in water. name one substance that is soluble in water.

salt

200
A student reads the label on the bottle of salad dressing shown. Why would the student shake the salad dressing well before using it? Ingredients: oil, vinegar, spices.
Vinegar and oil have different densities
200
What is the freezing point of water?
The freezing point of water is 0° C.
200
What is the best way to separate the pepper from the salt?
Put the mixture in water and filter the pepper out of the water.
200
Thermal Energy
Heat Energy - energy in the form of heat
300

A student wants to classify matter based on its solubility. How could she test a material to find out if it is soluble or insoluble?

Add it to water to see if it dissolves.

300
Oil floats on top of the water because...
water is more dense than oil
300
Some students put two ice cubes on separate plates. One ice cube had a mass of 100 grams. The other had a mass of 50 grams. Which result would be the same for both ice cubes in this investigation? A. Time to melt completely B. Temperature at which each ice cube melted C. The volume D. The mass
Temperature at which each ice cube melted
300

When a powdered drink mix was added to water, the liquid turned orange. A student decided that the taste was too strong, so he poured out half of the liquid and added more water. Which of the following changes most likely occurred when more water was added? A. Physical State B. Color C. Taste (sweeter taste) D. Density

Color - the orange color became lighter.

300
Solubility
The ability of a solid to be dissolved in a liquid.
400

A student measures the mass of several substances and records the results in the table below. The object has a density of 352 g/ mL and a volume of 0.5 mL what is the mass?

176 grams

400
Why can we float on water?
Because our bodies are less dense than the water
400
What causes sugar to dissolve faster in hot water than in cold water?
Hot water has faster moving particles than cold water.
400
A mixture of beads was placed in a container. The beads are of various sizes, and each one is made of plastic, glass, or steel. The mixture would be easy to separate because all the beads are - - ??
solids
400
Solution
A mixture of one substance dissolved evenly in another substance, for example salt water or lemonade.
500

In an investigation, 100 grams of salt are dissolved into 200 grams of pure water. The water is then heated on a hot plate. When the water evaporates completely, what will be the mass of the salt that is left?

100 grams

500
Compare these two objects. STONE & FOOTBALL -- What will happen to them if thrown in a pond? Why?
The stone will sink, and the ball will float.
500
Experiment: Determine if an equal amount of water will freeze faster in a shallow bowl or in a tall glass. What science tools you will need to collect data from this experiment? TWO
Celsius thermometer and stopwatch
500
A students measures the temperature of water being heated on a hot plate. The students observes that the temperature of the water is 58°C. How many more degrees Celsius must the temperature rise before it reaches the boiling temperature of water?
42°C
500
Variable
any factor that is changed in a lab *** ONLY 1 variable should be changed at a time
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