Science chemistry test ap Flashcards
Is molasses viscous
True
What is hardness?
A minerals ability to resist being scratched
Steel has low hardness
False
Solubility is a chemical property
False
Which container has a higher density (the balls are farther apart or closer together (solid and liquid))
The solid one
What is the most conductive
Copper wire
What are physical properties
Properties that are used to observe and describe matter
Reactive to air is a chemical property
True
Malleable
Pliable, can be bent
What is the most ductile?
Metals
Lustre
Is the shininess of an object
Viscosity
Is how the liquid flows (they used an ex of how the lava flows)
Digestion is a chemical change
True
Melting chocolate
Reversible
Glaciers melting
Heat added - physical change
What is a physical change?
A change in which the chemical composition does not change . It would be building and breaking, dissolving, and change of state
What is chemical change?
Ability of a substance to change into a new substance. Evidence of a chemical change us colour, odour, heat or light formed, gas firmed (bubbles), precipitate (L+L=S), new substance
how do you calculate percent error
percent error= predicted value - actual value divided by actual value x100
formulas (density, mass, volume)
D= m\v
M=vxd
V=m/d
chemical properties
~ describes the ability of a substance rot change into a new substance or substances
~Include how a substance reacts with other substances (ex: acids or water) or how it reacts to heat or light
~chemical properties can only be observed when a chemical change occurs
chemical properties include
~ absorbs heat in a reaction
~Combustible - reacts rapidly with oxygen to produce heat and light
~forms gas when heated
~reacts with acid
~reacts with water
~emits heat during reaction
~emits light during a reaction
~forms a precipitate (solid) in a solution
