Once Koolaid is thoroughly mixed, the water becomes transparent and no particles are visible to the naked eye, a characteristic of this type of mixture.
What is a homogenous mixture?
100
Iron rusting is an example of what chemical property of iron?
What is reactivity with oxygen?
200
In this state, particles are close together and move randomly past one another.
What is a liquid?
200
The salt flats on the outskirts of the Dead Sea are a product of this type of physical change.
What is evaporation?
200
A paper clip in milligrams.
What is 1000 mg?
200
A solid, typically homogenous mixture commonly made with metals such as gold or iron to form stronger materials.
What is an alloy?
200
The density of a substance with volume = 20 ml and mass = 140 grams.
What is 7 g/ml?
300
All molecules with two atoms of the same type bonded together are considered under this class. An example? The oxygen we breathe.
What is a diatomic element?
300
The average person flatulates a half a liter of gas in a day. This number is the equivalent amount of gas in microliters.
What is 500,000?
300
Mixtures can be separated in this way.
What is the physical properties of the substances?
300
Density, surface tension, boiling point, and volatility are examples of this type of property.
What is a physical property?
400
This kind of change occurs when your tea kettle turns black.
What is a chemical change?
400
When hydrochloric acid is added to sodium hydroxide and phenolphthalein this chemical change occurs.
What is a change in color?
400
The titanic initially stretched 269 meters. This is its length in Megameters (Mm).
What is .000269 Mm?
400
The properties of nitrogen and oxygen are retained in this mixture.
What is air?
400
Liquids with this property turn in to gas easily at room temperature and can be very dangerous.
What is high volatility?
500
When vinegar mixes with baking soda, the following evidence of a chemical change occurs.
What is evolution of a gas?
500
When methane combusts with this element, heat and light is released in the form of flames and carbon dioxide and water are formed.
What is oxygen?
500
The mass in kilograms of 30 cubic centimeters of mercury given mercury's density at 13.6 g/ml.
What is .408 kg?
500
This class of substances has definite proportions and involves more than one type of element.
What is a compound?
500
Measuring the slope of a line graph with these variables determines an object's density.