Follow these steps:

Twist two or three strands of the iron wire together, then twist the ends around the hooks in the copper wire. The iron wire will act as your filament. Place the lid (with the filament and wires attached) in the jar and carefully connect the free ends of the copper wire to the terminals on the 6-volt battery.

Placing cells in series increases the voltage in the circuit by 1.5 V for each cell. Increasing the voltage increases the brightness of the bulb. When a bulb in a series circuit is unscrewed all bulbs in the circuit go out. Increasing the number of bulbs in a series circuit decreases the brightness of the bulbs.

1. Strip about 3/4″ of insulation off each end of your two wires.
2. Tape one end of one wire to the negative end of your battery. Tape the other end of the wire to one side of the light bulb stem.
3. Tape one end of the other wire to the positive end of your battery.
4. Watch the light bulb light up!

of salt to the water and mix until completely dissolved. Insert the two electrodes into the salt water. They should be on either side of the beaker. Once this is done, the light bulb should light up.

The filament of an electric bulb glows because of the heating effect of electric current. As the current passes through the bulb it heats the filament which gives off light.

one quick way to create a simple generator is to manually move a magnet back and forth inside a coil. In this project, you’ll put a magnet inside a tube and wind a coil around the tube. When you shake the tube, the magnet should move back and forth inside the coil and create a voltage.

First step: Put three table spoons of salt in a plastic cup; Add water until it is half full and mix until completely dissolved. Second step: Build the electrodes using the wires, aluminum foil and magnet; Strip 1/2-inch section of insulation off all ends of the wires.

When you put salt in water, the water molecules pull the sodium and chlorine ions apart so they are floating freely. These ions are what carry electricity through water with an electric current. In short, salt water can help to produce electricity.

Onions reproduce either with seeds or by bulbils (little bulbs) that form from lateral buds. [6] After the first growing season, mature bulbs can be left in the ground or dug up and replanted. Either way the plant will undergo a period of dormancy, then grow during the next growing season.

Forms of tropism include phototropism (response to light), geotropism (response to gravity), chemotropism (response to particular substances), hydrotropism (response to water), thigmotropism (response to mechanical stimulation), traumatotropism (response to wound lesion), and galvanotropism, or electrotropism (response …

One important light response in plants is phototropism, which involves growth toward—or away from—a light source. Positive phototropism is growth towards a light source; negative phototropism is growth away from light.

Like all organisms, plants detect and respond to stimuli in their environment. Their main response is to change how they grow. Plant responses are controlled by hormones. Some plant responses are tropisms.

Thigmotropism is a directional growth movement which occurs as a mechanosensory response to a touch stimulus. Thigmotropism is typically found in twining plants and tendrils, however plant biologists have also found thigmotropic responses in flowering plants and fungi.

While there are several forms of tropism, we’ll just focus on three key types: phototropism, geotropism and thigmatropism.

Plant hormones include auxin, abscisic acid, ethylene, gibberellins, cytokinins, salicylic acid, strigolactones, brassinosteroids, and nitrous (nitric) oxide.

A tropism is the innate ability of an organism to turn or move in response to a stimulus. A stimulus can be any signal from the environment, and individual tropisms are often named after the stimulus that causes the movement. In a positive tropism the animal will move toward the stimulus.