Mixtures & Molecules
Compounds, pH & Salts
Crystals & Chemical Bonds
Chemical Reactions
Results of Reactions
100
Suspensions contain two or more substances that are mixed together completely.
TRUE or FALSE
FALSE. Suspensions are not dissolved.
100
What is formed when atoms of different elements combines chemically?
Compound
100
What is a piece of solid matter arranged in an orderly way called?
crystal
100
What is it called when one substance is changed into another?
Chemical reaction
100
Name 3 supplies needed to launch your rocket.
rocket, water, alka-seltzer tablet
200
Living organisms are made of molecules.
TRUE or FALSE
True
200
Compounds which contain the element hydrogen (H) and have a sour taste are called...
Acids
200
In the open air, mixing water and alka- seltzer makes the product lighter or heavier.
Lighter. Gas escapes into the air.
200
Name a safety rule used when launching a rocket.
1. Only launch your rocket outdoors with an adult present.
2. Always carry the rocket's launch pad pointing down.
3. Never point your rocket at any person or window.
200
A chemical reaction that absorbs heat energy is called ...
exothermic
300
What is formed when one substance dissolves evenly into another substance?
Solution
300
What is a neutral compound that is made from mixing an acid and a base?
salt
300
An ionic bond is when two atoms share electrons.
False
300
The scientific law that states "matter cannot be created or destroyed" is called the ________ of matter.
conservation
300
The process of burning fuel is called ...
Combustion
400
If you dissolve sugar into a hot cup of water it forms
a. Mixture
b. Suspension
c. Solution
c. Solution
400
One way salt can be separated from a mixture with water is by...
evaporation
400
Name a type of crystal that you have seen.
Rock candy, salt, diamond
400
This is an example of what kind of chemical reaction.
Combustion
400
Chemical Reactions that produce heat are called?
exothermic
500
When two or more substances are mixed together but still keep their original properties, the result is a ...
Mixture
500
Water is made up of two gases but is not a compound.
False. Water is a compound because hydrogen and oxygen are combined chemically.
500
When two atoms share electrons what is the bond called?
Covalent Bond
500
A ___________ bond is what we call the "atomic glue" that holds different atoms together.
Chemical
500
Does a rocket launch absorb heat or produce heat?
Can't tell. We need better equipment to measure.