Water Cycle
Clouds
Weather
Vocabulary
Vocabulary
Rock Cycle
Atomic Structure
100
Nature’s way of recycling water.
What is the water cycle?
100
Gray clouds that cover the lower part of the sky; rain or snow falls from them
What are stratus clouds?
100
The state of the air at a certain time and place
What is weather?
100
This type of rock forms when molten rock cools and hardens.
What is igneous rock?
100
This particle in the atom has a positive charge and is found in the nucleus.
What is a proton?
200
The process of water changing into an invisible gas called water vapor
What is evaporation?
200
White, puffy clouds that look like piles of cotton; they are known as fair-weather clouds
What are cumulus clouds?
200
Scientists who study weather
Who are meteorologists?
200
This process breaks down rocks into smaller pieces through wind, water, or ice.
What is weathering?
200
This tiny particle orbits around the nucleus of an atom and has a negative charge.
What is an electron?
300
Amount of water vapor in the air
What is humidity?
300
Thin, feathery clouds that appear high in the sky; they are a sign that rain or snow is on the way
What are cirrus clouds?
300
This tool measures temperature and is often filled with mercury or alcohol.
What is a thermometer?
300
This type of rock forms when layers of sediment are pressed and cemented together over time.
What is sedimentary rock?
300
This particle has no charge and is located in the nucleus of the atom.
What is a neutron?
400
The process of water vapor turning into water droplets
What is condensation?
400
Cloud that forms at the earth’s surface
What is fog?
400
This is a boundary where a mass of cold air moves in
and replaces a mass of warmer air. 
What is a cold front?
400
This process happens deep underground when heat and pressure change one type of rock into another.
What is metamorphic?
400
The number of protons in the nucleus of an atom is called its atomic number, and it determines the element's identity. What element has an atomic number of 6?
What is carbon?
500
This stage of the water cycle is when water falls from the sky as rain, snow, sleet, or hail.
What is precipitation?
500
Tall, dark clouds that mean thunderstorms with heavy rain and strong winds
What are cumulonimbus clouds?
500
This is is a boundary where a mass of warm air moves in
and gradually replaces a mass of cooler air. 
What is a warm front?
500
This is the name for molten rock beneath the Earth’s surface that can form igneous rock when it cools.
What is magma?
500
"This region around the nucleus where electrons are likely to be found is called the valence shell. What is the maximum number of electrons the valence shell can hold?"
What is 8?