Experimenting with eggs

What can you do with eggs other than eat them?

Naked Eggs

What does an egg look like without its shell? You may be picturing the white and yolk in a bowl after cracking it, but that isn’t the only way to remove the shell.

Materials: 1 egg, white vinegar, a bowl, a spoon

Directions: Fill a bowl with one cup of vinegar. Add the egg to the bowl, and wait at least 24 hours. When you check it after a day, you’ll notice some bubbles on the egg and a residue(残留物)in the water. Use the spoon to gently remove the egg from the bowl. Remove the old vinegar, and add a cup of fresh vinegar. Return the egg to the bowl, and wait another 24 hours. When you remove the egg this time, the shell should completely disappear.

Walking on Eggshells

Can Eggs hold the weight of your entire body?

Materials: six cartons(硬纸盒)of eggs, a garbage bag

Directions: Place the garbage bag on the floor to make any necessary clean up easier. Place the cartons of eggs into two rows of three. Make sure all the eggs are pointing in the same direction-either all pointy end up or all rounded end up. Step onto the first carton of eggs carefully. If you’re careful, you will succeed. Eggs are actually incredibly strong. The arch shape at the top and the bottom of the egg allows pressure to be distributed evenly over the egg.

【小题1】In the first experiment, what cause(s)the eggshell to disappear?

A．Water.

B．Vinegar.

C．Bubbles.

D．Residue.

【小题2】What was the main factor in the success of the second experiment?

A．The arrangement of the eggs.	B．the number of the eggs.
C．The distribution of the cartons.	D．The shape of the cartons.

【小题3】What was the author’s purpose in writing this text?

A．To persuade readers to use eggs in new ways.

B．To tell the reader about the structure of the egg.

C．To instruct readers how to experiment with eggs.

D．To inspire readers to conduct experiments carefully.