Category 1
Category 2
Category 3
Review
Review 2
100
A combination of two or more elements is called?
What is a compound
100
Chemicals on the left side of an equation are called what?
What is reactants
100
Photosynthesis is a chemical reaction that provides living things with food and __________
What is Oxygen
100
The temperature at which a substance freezes is its ________ point
What is freezing point
100
This occurs when a gas changes to a liquid
What is condensation
200
Changing one substance into another is called a
What is Chemical Change
200
Chemicals on the right side of an equation are called what?
What is Products
200
Which of the following is a chemical reaction? melting wax burning paper boiling water crushing a can
What is burning paper
200
At what temperature does water boil?
What is 212 degrees F
200
The temperature at which a substance melts is called its _____________ point
What is melting
300
When atoms break their old links and form new links with other atoms, a(n) __________ has occured.
What is Chemical reaction
300
A color change on metal that is caused by a chemical change is called
What is tarnish?
300
Which of the following is a Chemical Reaction? Rusting Boiling Water melting Ice
What is Rusting
300
A ___________ change alters the form of an object without changing what type of matter it is
What is Physical
300
Which of the following is a physical change? burning paper iron rusting boiling water baking cookies
What is boiling water
400
Chemists keep track of which substances are used and created in a chemical reaction by writing these
What are chemical equations
400
A solid that forms when two solutions are mixed is called a
What is precipitate
400
A solid that is formed when two solutions are mixed is called
What is precipitate
400
Some solid substances skip the liquid state of matter and go straight to gas. What is this change called?
What is Sublimation
400
Water freezes at what temperature
What is 32 degrees F or 0 degrees C
500
In every chemical reaction, the total mass of the reactants always equals the total mass of the products. This fact is known as the
What is law of conservation of mass
500
Plants use a chemical reaction called __________ to produce sugars from sunlight, water and carbon dioxide.
What is photosynthesis
500
Plants and animals use a chemical reaction called ________ to burn sugars for energy.
What is respiration
500
The slow change from a liquid to a gas is called
What is evaporation
500
Which state of matter has the most energy
What is gas
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