Which substance is a mixture? sugar/ salt/ water/ milk
What is milk
A.Sugar dissolving in water
B.Fire burning paper
C.Souring milk
D.Rusting metal
What is sugar dissolving water
If we wanted to separate metal shards from water what are two things we can use
What is filter and magnet
What happens when Distillation occurs when separating a homogeneous mixture?
What is boiling point
A law that states that the total mass of the substances before a chemical change is the same as the total mass of the substances after the chemical change.
What is law of conservation of mass
A mixture in which two or more pure substances are not evenly mixed
what is Heterogeneous Mixture
A mixture in which two or more pure substances are evenly mixed.
What is Homogeneous Mixture
the chemical process of burning coal produces energy and ash. the ash produced is best described as a... A. new state of matter B. new type of element C. substance with properties identical to coal D. substance with properties different from coal.
What is D. substance with properties different from coal.
a student stirs together salt crystals and sugar crystals. the crystals are the same size and color. together the salt and sugar make a ... solution/ compound/ mixture/ molecule
What is mixture
which process most likely produces a physical change, without a chemical change? A. a solid is exposed to heat and transforms into a liquid B. two liquids are mixed together and a solid forms in the solution C. a metal burns in air and produces a white powder D. a metal is exposed to water and becomes corroded
What is A. a solid is exposed to heat and transforms into a liquid
In distillation, the mixture is heated until the pure substance with the lowest boiling point changes to a gas. This gas is typically condensed back into a _______________
a student applies heat to a solid substance. which indicates that a chemical change occurred? A. the substance becomes a liquid but solidifies when cooled B. the substance changes color and stays that color when cooled C. the substance goes from liquid to gas very quickly D. the substance expands but stays the same color
What is B. the substance changes color and stays that color when cooled
From the choices below, what are two different ways to separate a Heterogeneous Mixture?
A.Filtering
B.Distillation
C.Grabbing
D.Mixing
What is Filtering and Distillation
a strip of magnesium burns at a temperature of about 2220C. burning magnesium produces a brilliant white light and leaves behind a white powder known as magnesium oxide. which best explains why the burning of magnesium results in a chemical reaction? A. a new substance is formed B. a temperature increase occurred C. the appearance of the magnesium strip changed. D. the state of matter of the magnesium strip changed
What is A. a new substance is formed