IScience - Chapter 7-4 and Chapter 8 Quest Flashcards
(19 cards)
In a chemical equation, the formulas to the left of the arrow represent the ___.
Reactants
In a chemical equation, the formulas to the right of the arrow represent the ___.
Products
Which of the following is NOT a factor that affects the rate of a chemical reaction? A) Concentration B) Pressure C) Surface area D) Temperature
B) Pressure
You can speed up a reaction if you break the solid reactant up into smaller pieces. Which factor does this describe?
Surface area
When a log burns in a fire, ___.
New substances are formed
The ability of an apple to change color when exposed to air is a ___.
Chemical change
Which of the following is NOT a possible sign of a chemical change? A) A change in state B) A change in color C) The release of a gas D) The release of energy
A) A change in state
Lightning flashes contain which type of matter?
Plasma
Which unit is used for density?
Grams per cubic centimeters
Dry ice is a solid that changes directly to a gas when thermal energy is added. This is an example of ___.
Sublimation
During a hot shower, water vapor fogs up the cooler mirror when it turns to water. This is an example of ___.
Condensation
Marco put a pot of water on to boil eggs. After a few minutes, all the water was gone. This is an example of ___.
Vaporization
As long as the temperature does not change, as the volume ___ the pressure ___.
increases, decreases
OR
decreases, increases
As the space in a container gets smaller, the ___ decreases.
Volume
In Boyle’s law, what remains constant?
Temperature
Charles’s law assumes constant ___.
Pressure
Charles’s law describes the direct relationship of ___ and ___ of a gas.
Temperature, Volume
The surface tension of a cup of water is caused by ___.
Attractive forces between water molecules
Viscosity is a measure of a fluid’s ___.
Resistance to flow
