121
In a clean-air chamber (all solid particles are filtered out) a cloud will not form even with a relative humidity greater than 200%. While clouds are made up of droplets that are essentially distilled water, each droplet is not 100% pure. At the cloud droplet's core is a tiny water attracting...
Grade Level   6 7 8 9 10 11 12
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122
Collision and coalescence is the process by which cloud droplets grow large enough to fall as rain in clouds. You will suspend two ping pong balls in the stream of air supplied by a hair dryer. The balls will bump into each other, creating a clicking sound signifying the collision.
Grade Level   6 7 8 9 10 11 12
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123
Sometimes a claim is made that Christopher Columbus sailed west to prove the world was round and not flat, but that wasn't the case at all. Even in ancient times sailors knew that the Earth was round and ancient scientists not only suspected it was a sphere, but even estimated its size. Measuring...
Grade Level   6 7 8 9 10 11 12
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124
The Earth is in constant motion. Each day the earth makes one complete rotation. Each year, the earth makes one orbit of the sun. The first motion is obvious. The second one, however, is muh harder to notice except over a much longer period and can be made visible only by some time and some...
Grade Level   3 4 5 6 7 8 9 10 11 12
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125
We observe the different angles between the sun, earth, and moon by the phases of the moon we see each month. Students, acting as the earth, will see differences in light and dark sides of their hand-held moon.
Grade Level   6 7 8 9 10 11 12
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126
Ocean water is salty and, in general, cold. Differences in the water density associated with temperature and salinity are vital in shaping the Great Ocean Conveyor. This lesson plan demonstrates how salinity and temperature affect density of water.
Grade Level   7 8 9 10 11 12
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127
The constant pushing of molecules into each other if the reason we feel wind. As one molecule bumps into another, it transfers energy into the next molecule. This constant pushing on the oceans surface also transfers energy to the water. This energy transfer is responsible for the motion of the...
Grade Level   7 8 9 10 11 12
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128
Onjects float if they weigh less than the weight o the water they displace. Conversely, onjects will sink if they weigh more than the weight of the water they displace. Students will observe how the added sigar in a can of soda affecs its ability to float in water by the change of density.
Grade Level   6 7 8 9 10 11 12
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129
Just as air can have different densities, water can have different densities as well. As the salinity of water increases, the density increases as well. Fresh eggs will float in saltwater, but will sink in freshwater. This will show that as the salinity increases the density also increases.
Grade Level   4 5 6 7 8 9 10 11 12
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130
We all know the oceans are salty but so are other sources of water. The oceans have a salinity (salt content) of 35%. The Dead Sea has an average salinity of 290%, almost nine times saltier than the oceans. But what actually does that mean? Just how salty tasting are these various bodies of water?...
Grade Level   6 7 8 9 10 11 12
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131
Water moves from the ground to the atmosphere and then returns to the ground, however, the actual path water takes in its cycle is more complicated. There are many stops on water's journey. Students will learn how the water cycle works using 3-D paper craft activity.
Grade Level   3 4 5 6 7 8 9 10 11 12
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132
At its basic, water moves from the earth's surface to the atmosphere and then returns to the surface. However, the actual path water may take in its cycle is far more complicated. The students will discover more of these cycles by acting as water molecules and travel through parts of the overall...
Grade Level   3 4 5 6 7 8 9 10 11 12
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133
What does up, must come down. Precipitation is the most commonly seen aspect of the hydrologic cycle. Students will learn how the water cycle works using 3-D paper craft activity. The students will see a demonstration of the concept of precipitation.
Grade Level   3 4 5 6 7 8 9 10 11 12
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134
There are three states of matter: gas, liquid, and solid. Water in our atmosphere exists in these three states constantly. As the temperature of water vapor (a gas) decreases, it will reach the point at which it turns into a liquid (called the dew point or the point at which dew forms). This change...
Grade Level   3 4 5 6 7 8 9 10 11 12
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135
There are two methods water moves from the ground to the atmosphere as part of the hydrologic cycle. Transpiration is basically evaporation of water from plant leaves. Studies have revealed that transpiration accounts for about 10% of the moisture in the atmosphere, with oceans, seas, and other...
Grade Level   5 6 7 8 9 10 11 12
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136
Different colored objects absorb energy at different rates. That is partially due to albedo. Albedo is the amount of reflection from a surface. The demonstration will show that water in a dark colored can will have a higher temperature after exposure to the sun than water in a shiny can.
Grade Level   6 7 8 9 10 11 12
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137
The earth receives its heat from the sun in the form of radiation. Many in the animal kingdom lay out in the sun to absorb this form of energy to warm their bodies. This form of energy is vital to life on this planet. The student will learn how the sun transfers heat to the earth through radiation.
Grade Level   7 8 9 10 11 12
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138
Pressure is not only a matter of altitude but also dependent upon the temperature. As the temperature increases so does the pressure. The molecules and atoms that comprise the air we breathe gain energy as they absorb heat. That increase in energy results in faster moving atoms which we observe as...
Grade Level   7 8 9 10 11 12
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139
Bernoulli's principle states that in fluid flow, an increase in velocity occurs simultaneously with decrease in pressure. The students will discover that the faster air moves (air acting as a fluid), the lower the pressure beccomes within that air flow. They will see this effect blowing between two...
Grade Level   7 8 9 10 11 12
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140
To show that air has weight, the air is removed from one of two balanced balloons throwing the balance off.
Grade Level   5 6 7 8 9 10 11 12
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