121 Plus 9 Biology Experiments

Plants feed us, but how do plants get fed?Things Required:A stalk of celery with its leaves1 teaspoonful of red food colouringA half glass of waterDirections:Stand the stalk of celery in a half glass of water coloured with a teaspoonful of food colouring. Start it off in bright light and let it remain overnight. This Is […]

This will show you which side of the plant leaf takes in gases.Things Required:Potted plantVaseline Directions:Coat the top of four leaves with a heavy layer of Vaseline. Coat the underside of four leaves with a heavy layer of Vaseline. Observe the leaves daily for one week.Is there any difference in the two sets of leaves?This

Compare the taste and feel of different sugars and honey in these great cookies.Things Required:1½ cups of flour1½ sticks or 170g margarine or butter2 tablespoonfuls of white sugar2 tablespoonfuls of brown sugar1 Tablespoon honey1½ tablespoonfuls of lemon juiceBowlsWooden spoonCookie sheetsTeaspoon Directions:Preheat the oven to 350°F (175°C).Soften the margarine at room temperature before you start to

The purpose of this experiment is to demonstrate that starch, a food substance, is produced in leaves.Things Required:Paper towelsTincture of iodineLeaf, pale greenRubbing alcoholShallow dishPint (500 ml) jar with a lidMeasuring cup (250 ml) Directions:Place the pale green leaf in the jar. The paler the leaf, the easier it will be to extract the green

When we feel hungry, we often reach for a sweet/candy bar. But suppose, we ate a piece of fruit instead.Things Required:1 medium-size apple1 medium-size bananaTootsie RollsPieces of chocolateDirections:For your afternoon snack, try a Tootsie Roll one day and an apple the next. On a third day, try chocolate. On the fourth, eat a banana.This Is

In this experiment, you will determine the effect of dissolved nutrients on the freezing rate of water. How does this affect the freezing rate of plants?Things Required:Salt2 5-ounce (150 ml) paper cupsMeasuring spoon-teaspoon (5 ml)RefrigeratorMasking tapeMarking pen Directions:Fill both cups with water; label one salt-water and the other water. Add 1 spoon of salt to

Here’s another way to tell whether a substance is salt or sugar! Things Required:1 tablespoonful of salt2 cupsFood colouring 2 colours1 tablespoonful of sugar waterAn ice cube tray with separatorsDirections:Fill the cups halfway with water and colour each one with a few drops of a different food colouring. Dissolve the salt in one cup and

Perform this example and see how leaf structure affects its freezing.Things Required:Lettuce leafCelery leafGreen onionPaper towelDirections:Place the vegetables in a freezer on the paper towel. Check them every 2 minutes to determine which freezes first. This Is What Happens:The lettuce and celery leaves froze first and the onion took a much longer time to freeze.Science

If someone pulled the labels off identical containers of sugar and salt, could you tell which was which? There are ways to tell besides tasting them.Things Required:1/4 teaspoonful of salt2 small saucepans1/4 teaspoonful of sugar Directions:Place the salt in one of the pans and the sugar in the other. Heat each for a few minutes

In this great experiment, you will make leaves and stems of plants act like a straw.Things Required:Glass soda bottleIvy leaf and stemClayStrawPencilMirrorDirections:Fill the bottle to within an inch of its top. Wrap the clay around the stem near the leaf. Place the stem into the bottle. The end of the stem must be below the

In which pot- the short, wide one or the tall, narrow one-can we poach an egg faster?Things Required:A tall, narrow pot4 cups of waterA slotted spoonA short, wide pot2 raw eggsA timer (optional) Directions:Pour two cups of cold water into each pot.Place the short pot on the stove over a medium flame. After the water

Sugared LeavesHow do nutrients transport through the stems of plants? This experiment shows the answer.Things Required:2 fresh stalks of celery with leaves (the pale inner stalks from the bunch is best)2 glassesSugarMeasuring spoon -tablespoon (15 ml)Masking tapeMarking penDirections:Fill each glass one-half full with water. Add 4 spoons of sugar to one of the glasses. Label

Does it matter what size of a pot we cook in? Does size and shape matter? Find out.Things Required:A tall, narrow potA short, wide pot2 cups of waterDirections:Pour a cup of water into each pot. Place both pots on the stove over a medium flame. This Is What Happens:The water in the short pot boils

This experiment shows how water is transported through plant stems.Things Required:Measuring cup (250 ml)2 glasses1 white carnation with a long stem (purchase at a floral shop)Red and blue food colouring Directions:Ask an adult to cut the stem in half lengthwise from the bottom to about half way up towards the flower. Pour 1/2 cup of

What effect does salt have when you boil water?Things Required:2 small pots half full of cold water2 tablespoonfuls of saltDirections:Add two tablespoonfuls of salt to one of the pots of cold water. Don’t add anything to the other pot. Heat both pots on the stove. Which one starts to boil first? This Is What Happens:The