Phenomena are...

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• Observable events
• That can be explained with
• Evidence
• Logic
• Scientific principles

Systems

Speed of sound

• Why is there a boom when a jet travels faster than sound?
• Why does a cloud form over the wings of a fast traveling jet?

Systems

Granite

• Why are there color variations in a granite countertop?
• What determines the size of the crystals in granite?

Systems

Aphids

• Why are aphids found on some plants and not others?
• Why are aphids found on the under-side of leaves more than on the top side of leaves

Systems

Road Cracks

• Why do cracks appear in roads?
• Why do cracks in roads often follow painted lines?

Systems

Salt crystals

• Why are table salt crystals cubic?
• Why are some crystals larger than others?

Systems

Sunsets

• Why are clouds more colorful at sunrise or sunset than in the middle of the day?
• Why are sunrises and sunsets red, orange and yellow rather than green, blue and violet?

Systems

Melting ice

• Why does ice melt more quickly on some surfaces than others?
• Why do does water bead rather than flatten out?

Systems

Leaf appearance

• Why do most plant leaves appear green?
• Why do leaf size vary with environment?

Systems

Electrophoresis

• What determines speed of a sample in electrophoresis?
• Why do different samples produce different patterns?

Systems

Helium Baloons

• Why do helium balloons rise?
• Why do some balloons rise faster than others

Systems

Flames

• What do elements glow different colors?
• Why is there an internal flame and an external one?

Systems

Fall colors

• Why do some leaves turn yellow or red in the Fall?
• What determines the shades of color that leaves turn?

Systems