Mixtures and Molecules
When two or more substances are mixed together but still keep their original properties, the result is a ____________.
Mixture
A compound is a substance that is formed when atoms of different elements combine chemically. Give an example of a compound.
Water, Salt, Rust, Sugar....
What is a piece of solid matter arranged in an orderly way called?
Crystal
What is it called when one substance is changed into another substance?
Chemical Reaction
A chemical reaction can or cannot be reversed?
Cannot
What is formed when one substance dissolves evenly into another substance?
Solution
A centrifuge can be used to separate mixtures.
True
A _________ bond is what we call the "atomic glue" that holds different atoms together.
Chemical
What part of the atom is changed in a nuclear reaction?
The nucleus.
All oxides are a combination of at least one element and ________.
Oxygen
If you dissolve sugar into a hot cup of water, it forms a __________?
Solution
True or False? Bases contain the elements Oxygen and Hydrogen. They have a bitter taste and feel slippery.
True
The law of the conservation of matter states that matter can neither be created nor ____________.
destroyed
The sun uses nuclear fission or fusion?
Fusion
Iron oxide is better known as ________.
Rust
True or False? A scanning microscope uses traditional photography techniques to take full color images of molecules.
False
Salt is a compound made from an acid and ________.
a base
True or False? Combustion is an example of a physical reaction.
False
What is Newton's third law of motion? (Rockets are based on this law)
For every action, there is an equal but opposite reaction.
A reaction that produces heat is called an ___________ reaction.
Exothermic
If you mixed chocolate chips evenly through your ice cream, it would be an example of a _________.
Suspension
Compounds which contain the element hydrogen and have a sour taste are called ________.
Acids
A chemical bond forms when two or more atoms share _____________.
Electrons
Who were the first people recorded to use some kind of rocketry?
Chinese
A reaction that uses heat, so it seems to put out cold is called an __________ reaction.
endothermic