Chapter 2 Test Study Guide Flashcards
If a material contains three elements joined in a fixed proportion, it is a what?
Compound
A substance has a melting point of 0 celsius and a boiling point of 100 celsius. The substance is most likely what?
Water
Which of the following is a heterogeneous mixture?
A jar of mixed nuts
Which of the following has the highest viscosity?
Corn Syrup
Which of the following is a mixture?
Sand
A mixture that appears to contain only one substance is a what?
A homogeneous Mixture
What physical properties of nylon and leather make them good materials to use for shoe laces?
Durability and Flexibility
A substance that is made up of only one kind of atom is a _____
Element
Give examples of things that are malleable
Aluminium .. Gold.. Silver
A material that is malleable and conducts electricity is most likely what type of material?
A metal
What method can be used to separate parts of a liquid mixture when the entire mixture can pass through a filter?
Distillation
Flammability is a materials ability to burn in the presence of what?
Oxygen
What is the symbol for gold?
AU
A mixture can be classified as a solution, suspension, or colloid based on what?
The size of the largest particles
What is the symbol for aluminum
AL
What are the clues that a chemical change has occurred?
Production of gas……Formation of precipitate…distinct change in color.
The following are pure substances?
Compounds
Give examples of a pure substance
Water; Oxygen
If an unknown substance cannot be broken down into simpler substances, it is a ____ and is made only of____ kind of Atom
Element; one
Which of the following is a clue of chemical change?
A gas forms when vinegar and baking soda are mixed
You are about to open a container of soy milk but notice that there is our instructions to shake well before serving the soy milk is most likely a ______.
Suspension
Why is water a compound?
- Can be broken down into simpler substances
2. always has to hydrogen Atoms for each one oxygen aton
Filtration can be used to separate mixtures based on which characteristics?
The size of their particles
When a physical change in a sample occurs, what can change in their sample?
shape.. Mass.. Volume
What type of material is used for making molds because it has a low melting point?
Wax
Rust forms because iron and oxygen are highly ______ elements.
Reactive
If I spoon gets hot quickly when it is used to stir a pot of soup, is probably made of _____.
Metal
Material used for electrical wiring would need to have good____.
Conductivity
A cake rises as it bakes because a chemical change causes _______ to be produced.
Carbon Dioxide
______ is a process that could be used to separate dissolved particles from the liquid in a solution
Distillation
Matter that always has exactly the same composition is classified as a ______.
Pure Substance
A solid that forms and separates from a liquid mixture is a____.
Precipitate
A ______ change occurs when a material changes shape or size but composition of the material does not change
Physical
The substance in a ______ mixture are evenly distributed throughout the mixture
Homogeneous
The symbols for elements either have____ or____ letters
One; two
Is mixture C Homogeneous or heterogeneous?
Heterogeneous because it can be filtrated and it can be scattered by light
What are the characteristics of a mixture?
They have varying properties
Which of the the mixtures in figure 2-2 is a colloid?
A; Scatters light, and cant be separated by filtration or layers
Which of the mixtures is a solution?
Doesn’t scatter by light, doesn’t separate into layers, or cant be filtrated.
Rank the mixtures
B.A.C
