Matter
Atoms
Chemical Reactions
Vocabulary
- Grade 5
- Grade 5
Vocabulary
100
Any substance that takes up space and has a mass.
Matter
100
The tiny particles that make up matter
Atoms
100
What is a chemical reaction?
A process in which substances change into new substances.
100
The amount of matter in an object, measured in grams (g).
Mass
100
A _________(+) is a positively-charged subatomic particle that is located in the center of an atom.
Proton
200
Of the three states of matter, ________ have a defined shape and volume.
Solids
200
The center of an atom, it contains subatomic particles such as protons (+) and neutrons (no charge).
Nucleus
200
What gas is often produced when vinegar reacts with baking soda?
Carbon dioxide gas.
200
The space an object takes up.
Volume
200
Electrons at the bottom of a thundercloud are attracted to positive charges on the ground. ________ is formed causing electrons to flow from the cloud to the ground.
Volume
300
This state of matter has a defined volume but no shape. It typically takes the shape of its container.
Liquids
300
The movement of negatively-charged ________(-) allows for static electric phenomena and the flow of electric current in a wire.
Electrons
300
What are two signs that a chemical reaction may have occurred?
Color change, gas bubbles, heat, or light. (Any two.)
300
The change of a liquid to a gas.
Evaporation
300
An electric circuit usually consists of a ________ source such as a battery, and electrical device such as a lightbulb, and wire.
Power Source
400
The two types of changes that can happen to matter are called.
Physcial & Chemical
400
The electric _______ of an atom can be positive or negative.
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Charge
400
Is burning wood a physical change or a chemical change? Why?
A chemical change, because new substances such as ash and gases form.
400
The change of a gas to a liquid.
Condensation
400
_________ are materials that allow electric current to pass through it, such as a copper wire.
Conductors
500
Sometimes referred to as the fourth state of matter, ______ is formed when a gas is heated.
Plasma
500
What is the law of electric charges when it comes to positive and negative charges?
Like charges repel, Opposite charges attract.
500
When iron reacts with oxygen and water to form rust, what type of change has occurred?
A chemical change, because a new substance called rust forms.
500
The change of matter from one state to another is generally referred to as a ___________.
Physical Change
500
__________ are materials which electricity can NOT easily pass through, such as plastic or glass.
Insulators