C- carbon dioxide (1)
- carotenoids (1)
Carotenoids are pigments that give yellow or orange colors to many plants, vegetables, and fruits. In the fall, these pigments show up in the leaves of many trees after the green chlorophyll breaks down.
- chemical change (1)
In a chemical change, the actual chemical makeup of a material is changed, and you cannot get the original material back without another chemical change. Burning wood is an example--you end up with ash and various gases (with heat as a byproduct), but you cannot undo the change to get your wood back.
- chlorophyll (1)
- Clifton Gorge (1)
Clifton Gorge State Nature Preserve is located near Yellow Springs, Ohio.
- color wheel (1)
- coniferous (1)
Coniferous trees have needles rather than broad leaves like deciduous trees. Most coniferous trees retain their needles all year long.
D- dave scott (1)
- deciduous (1)
Deciduous trees are those with leaves that normally change color in the fall and drop from the tree, growing new leaves in the spring.
- density (1)
Density is a measure of how tightly packed the molecules are in a substance--the more tightly packed, the higher the density. For example, a brick and an equally-sized piece of styrofoam take up the same space (or volume), but the density of the brick is much higher.
- disturbance (1)
- dolomite (1)
E- energy (1)
- energy beads (1)
- Englewood MetroPark (1)
The Englewood MetroPark is one of a series of parks in the area of Dayton, Ohio. The Englewood park has a large lake behind a flood control dam, along with numerous hiking trails through woods and meadows.
- erosion (3)
Erosion is the carrying away of weathered materials, through water, wind, and ice.
- expand (1)
To expand means to grow larger. In science, most materials expand when they are heated and contract (grow smaller) when they are cooled.
H- habitat (1)
A habitat is a type of place with certain conditions where an organism thrives.
- hike (3)
- hiking (3)
| M- medium (1)
In science, the word medium is often used to describe a material through which waves can pass. For example, sound waves travel at different speeds through air, wood, and water, each of which is a different medium.
- mercury (1)
- mirror (1)
A flat reflective surface that can bounce light waves off of it.
- molecules (1)
- moon (2)
P- periscope (1)
A periscope is a device for seeing around corners to view objects that are not within a direct line of sight. It uses mirrors to reflect light from one direction to another.
- phases (1)
- phone (1)
- physical change (1)
In a physical change, the form, phase, or shape of a material may change, but its chemical makeup remains the same. Examples include ice melting into liquid water, or tearing a piece of paper.
- plaster (2)
- plaster of paris (2)
- pop bottle (2)
- prism (1)
- project (2)
R- radiation (1)
- rainbow (1)
- reflection (1)
- refraction (2)
Refraction means the bending of waves. It is frequently mistaken for reflection, which is the bouncing of waves off of a surface. Refraction happens because waves (such as light waves) travel at different speeds through different materials--as the wave passes from one material, or medium, to another, it bends as it either speeds up or slows down.
- refraction index (1)
- rock (2)
- rocket (1)
U- ultraviolet (1)
Ultraviolet radiation is a form of energy. It is higher in energy, and has a shorter wavelength, than the visible light we can see with our eyes. On the electromagnetic spectrum, it lies just past the band of visible light on the violet side. Ultraviolet radiation is responsible for sun burns if you stay exposed to the sun for too long.
W- water (2)
- waterfall (1)
- wave (2)
- weathering (3)
Weathering is the process of rocks being worn down into smaller and smaller pieces by the forces of water, wind, ice, and temperature changes.
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