Aye-Aye
List an example of a physical change:
melting ice, mowing the lawn, carving a statue
Dissolving sugar in water leads to what kind of type of mixture?
homogeneous mixture
You can speed up a reaction if you break the solid reactant up into smaller pieces. Which factor does this describe?
surface area
In a chemical equation, the formulas to the left of the arrow represent the ______.
reactants
What are the three factors that impact the rate of a chemical reaction?
concentration, surface area, temperature
What is sublimation?
The change from a solid into a gas.
What is the amount of matter contained in an object?
mass
When atoms rearrange and bond into new substances, the process is called a _______.
reaction
What items are located IN the nucleus?
Protons and Neutrons
What is the ability of an object to carry heat?
conductivity
What is the amount of a substance in a certain volume?
concentration
Burning wood is an example of a physical change. T/F
false- chemical
Why do we have to balance equations?
conservation of mass
How can you separate salt and water?
boil them
Matter changing into a substance with new physical and chemical properties is called?
chemical change
What property is the ability of a pond to freeze over in winter?
physical property
When atoms rearrange and bond into a new substance, the process is called a _____.
reaction
Balance the equation:
__Na + __Cl2 --> __NaCl
2Na + Cl2 --> 2NaCl
A sample of water has a mass of 193 g. Salt is added to the water, the final solution weighs 238 g. How much salt was added?
45 g
What does a change in the chemical properties of a substance result in?
new substance
Write out a balanced equation.
Answers may vary
The evaporation of water is an example of change in _______.
state
In a chemical equation, the formulas to the right of the arrow represent the ______.
products
What is an example of a chemical change?
burning
When a mixture contains substances that are not evenly mixed, what is it called?
heterogeneous mixture