Endothermic Reactions
When an endothermic reaction occurs, is energy absorbed or released?
Absorbed
When an exothermic reaction occurs, is energy released or absorbed
What are the three radioactive particles released during radiation?
Alpha, Beta, Gamma
How do you know that a chemical reaction takes place when you mix baking soda and vinegar?
Gas production
True or false - all atoms are made of matter?
True
When an endothermic reaction occurs, what typically happens to the temperature?
It decreases
When an exothermic reaction occurs, what happens to the temperature?
It increases
What is the least dangerous form of radiation?
Alpha
Why do scientists make data tables?
To make it easier to understand data
What law states that the number of atoms remain constant during a chemical reaction?
The Law of Conservation of Mass
If more energy goes in than goes out of a system during a reaction is it endothermic?
Do the products of an exothermic reaction have lower or higher energy than the reactants?
Lower
What is the most dangerous form of radiation?
Gamma
Which of these is not always a sign of a chemical reaction
Phase change (example - liquid to solid)
Temperature change
Color change
light production
What is the name of the term of substances that form after the reaction
Products
Are bonds broken or formed during an endothermic reaction?
Broken
Is combustion an example of an exothermic reaction?
Yes
What does the term "half life" mean?
The amount of time ended for half the atoms of a sample to decay
Why do scientists measure the mass before and after a reaction takes place?
To observe if the mass changed as a result of the reaction
What is the name of the term of substances that you start with in a chemical reaction
Reactants
Why do endothermic reactions feel cold?
They absorb energy (heat) from its surroundings
DAILY DOUBLE
Why is water freezing considered an exothermic reaction?
Which form of radiation can pass through your hand, but not a piece of aluminum?
Beta
Between quantitative and qualitative data, which form of data examines numbers and measurements?
Quantitative
Why do chemical equations have to be balanced?
To show that the number of atoms never changes