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100
What refers to a state of matter with a definite volume but not a definite shape?
What is liquid
100
What processes is a physical change in which the identities of the substances do not change when they are mixed?
What is dissolving
100
What is a state of matter without a definite shape or volume?
What is gas
100
During a physical change what characteristic of matter changes?
What is physical properties
100
Depending on the size and shape of its container, a gas changes both shape and ...?
What is volume
200
What is the amount of space a sample of matter occupies?
What is volume
200
The only sure sign of a chemical change is the formation of what?
What is a new substance
200
What term describes any characteristic of matter that you can observe without changing the identity of the substances it’s made of?
What is physical property
200
When a substance is heated to its boiling point, the bubbles indicate that liquid is turning into ...?
What is a gas
200
What refers to a change in a substance where no new substances are formed?
What is physical change
300
Solubility refers to one substance’s ability to do what ?in the presence of another substance?
What is dissolve
300
Which law states that the total mass before a chemical reaction is the same as the total mass after the chemical reaction?
What is conservation of mass
300
Color change can be an indication of ...?
What is a chemical or physical change
300
What term describes anything that has mass and takes up space?
What is matter
300
What kind of change has occurred when substances change into other substances?
What is chemical
400
What is another name for a chemical change?
What is chemical reaction
400
Density depends on ____.
What is mass and volume
400
When a peeled banana turns black, it is a ____. (what kind of change?)
What is chemical change
400
What is the formula that correctly finds density?
What is D = m/V
400
The physical property that determines how easily heat and electricity pass through a material is _____.
What is conductivity
500
The state of matter of a material depends on its _____.
What is temperature
500
Which method of separation can be used to separate a solution of water and salt?
What is separation by boiling point
500
Photosynthesis is a chemical reaction which uses _____ as a form of energy.
What is light
500
In an experiment, a student adds baking soda (sodium bicarbonate) to vinegar (acetic acid) and observes that a large amount of gaseous carbon dioxide is released. What is the scientific reason for this change?
What is baking soda chemically changes when added to vinegar.
500
A bicycle was left outside for several days. What most likely happened to the bicycle?
What is chemical changes colored it reddish-brown.