EXPERIMENT: STATIC ELECTRICITY OBJECTIVES

Perform an experiment of ionic bonding.



Instructions

1. Suspend two inflated balloons by threads and tie them to a piece of string at the same point.

2. Rub each balloon with a piece of material.

A. What happens to the balloons when they are close together? What does this mean about their charge?

3. Cut two 3-by-12 inch strips of material from the nylon stocking.

4. Place both strips on a piece of white paper and rub them briskly in your hand.

5. With your fingers, lift the two pieces of nylon and hold them side by side.

B. What happens and why?

C. What electrical charge is present on the nylon strips?

6. Now bring one of the nylon strips near one of the balloons.

D. What happens? Explain what this means about the electrical charge of the nylon strip.

E. How does this investigation demonstrate the concept of ions and ionic bondi

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

the answer is d p: cell, q: organ, r: organ system, s: tissue

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.

answer; ///blank(1); green bananas; blank(2); raw potatoes;