121 Plus 9 Biology Experiments

What’s the difference between butterflies and moths? Let’s check out.Things Required:Coat hangerPillowcase2 large jarsStocking2 rubber bandsBroom handle or long stickButterfly and moth (instructions for catching below)Directions:Make an insect net by bending a coat hanger into a hoop. Attach the pillowcase to the hoop and secure the ends of the hoop to the broom handle. (This […]

A toast is defined in the dictionary as a slice of bread browned on both sides by heat. But what causes the bread to brown?Things Required:A toaster, an electric2 slices of bread broiler or an ovenDirections:Place the pieces of bread in the toaster, in the oven under the broiler. Let one stay in twice as

Can we communicate with fireflies? Let’s try and find out their secret language codes.Things Required:Fireflies in a jarTorch Directions:In a darkened room, hold the torch near the jar of fireflies. Turn the light on and off at one-second intervals. The easiest way to judge a one-second interval is to say these words “One thousand and

Does the light from fireflies give off heat? We will find out in this easy experiment.Things Required:Fireflies2 glass jars with lids2 thermometers (must fit inside the jars)Directions:On a night when fireflies are plentiful, catch as many as you can and place them in a jar. It is easiest to catch them with your hands after

Vinegar is often used to flavour salads and tenderize meats. Many types of vinegar are made from fruit or wine (which is made from fruit). You can use apples to make your vinegar.Things Required:2 apples, coredBlender or juicer2 jars Directions:Cut the apples into small pieces, place them in your blender or juicer, and press out

In this simple experiment we will see the effects of yeast on food decomposition.Things Required:Banana2 plastic sandwich bagsDry yeast measuringSpoon -teaspoon (5 ml)MarkerDirections:Ask an adult to cut 2 slices from the banana. Place a slice of banana inside each plastic bag.Sprinkle one-half of a spoon of yeast on one of the banana slices. Close both

Sometimes “cooking” starts hours before you light the stove. Things Required:2 chicken breasts1 tablespoonful of lime juiceDash of chili powder (optional)Dash of turmeric or cumin (optional)Bowl2 teaspoonfuls of olive oil1/2 teaspoonful of minced garlic1 teaspoonful of rosemary (optional)Salt and pepperWooden spoonDirections:Mix the lime juice and olive oil. Add the herbs and stir. Put one of

The purpose of this effort is to determine the best way to grow penicillin.Things Required:Cotton balls2 oranges2 lemons2 bread sacksBowlDirections:Rub the fruit on the floor. Place the fruit in a bowl exposed to the air for one day. Place in each bread sack an orange, a lemon, and a cotton ball wet with water. Secure

Gelatin is a protein that comes from the connective tissue in the hoofs, bones, tendons, ligaments and cartilage of animals. Vegetable gelatin, agar, is made from seaweed. Gelatin dissolves in hot water and hardens with cold. We can put all kinds of fruit in it to make terrific desserts-but we’re told on the package not

The idea of this experiment is to determine where moulds grow best.Things Required:CoconutRubber bandBread sack Directions:Ask an adult to break the coconut and pour out the liquid. Expose the open coconut to the air for 2 hours. Put the coconut pieces back together and secure with a rubber band.Place the coconut in a bread sack

Bananas are picked and shipped green, but green bananas are not digestible. You can ripen them in a few days but is it true that you should never put bananas in the refrigerator?Things Required:2 green bananas Directions:Place one banana on the counter and one in the refrigerator.This Is What Happens:Within a few days the banana

The intention of this experiment is to test the result of preservatives on bacterial growth.Things Required:Table saltWhite vinegar3 small clear glasses1 chicken bouillon cube1 measuring cup (250 ml)1 measuring spoon -teaspoon (5 ml)Masking tapeMarking pen Directions:Dissolve the bouillon cube in one cup (250 ml) of hot water from the faucet. Equally divide the solution between

How do you prevent a cut apple from turning brown?Things Required:An appleLemon juice Directions:Cut the apple into quarters. Let one of the quarters remain on the kitchen table. Place another in the refrigerator. Sprinkle lemon juice on the other two quarters. Place one of these on the table and the other in the refrigerator.This Is

The idea is show the effect that temperature has on the growth of bacteria.Things Required:Milk measuring cup (250 ml)2 pint (500 ml) jarsRefrigerator Directions:Put a cup of milk in each jar. Close each jar. Place one jar in the refrigerator. Place the second jar in a warm place. Examine the milk in each jar once

How do you get juice out of a lemon?Things Required:2 lemonsA knifeDirections:Cut the first lemon in half and squeeze out as much of the juice as you can. Before you cut it, roll the other lemon on a hard surface like a countertop. Then squeeze out the juice. This Is What Happens:It is much easier