Objective:
To show how distance affects a planet’s period of revolution around the sun.

Standards:
Objects in the Sky (sky object properties, locations, and movements) and Earth in the Solar System (position, properties of sun, earth, its moon, and the other planets).

Materials:
a yardstick and a ruler.

Procedure:
Hold the yardstick and ruler [...]

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Objective:
To demonstrate how light reflects water and can enhance vision by changing the path of light.

Standards:
Properties of Earth Materials (physical and chemical properties of water), Light, Heat, Electricity, and Magnetism (light reflectance, refraction, and absorption) and Transfer of Energy (light transmission, refraction, absorption, reflection, and scattering).

Materials:
vegetable oil, page from [...]

Objective:
To demonstrate surface tension of water, that certain things can break the surface tension and what happens to objects in the water as a result of surface tension breakage.

Standards:
Properties of Earth Materials (physical and chemical properties of water) and Structure and Properties of Matter (atoms interact with each other by [...]

Objective:
To demonstrate that water is displaced by floating objects.

Standards:
Properties of Earth Materials (physical and chemical properties of water).

Materials:
two drinking glasses that float inside each other (glass works the best) and water.

Procedure:
Pour just enough water to cover the bottom of one of the drinking glasses.
Place the second glass [...]