Observe the effect that salt has on the temperature of water in this zappy experiment.Things Required:Crushed iceWater3 tablespoonfuls of table saltMetal food can that will hold about 2 cups of liquid Directions:Fill the can with crushed ice. Add 1 cup of water to the can. Wait two to three minutes until water collects on the […]
This is all about growing fluffy white crystals on charcoal briquets.Things Required:4-5 charcoal briquets1 tablespoonful of household ammonia2 tablespoonfuls of water1 tablespoonful of table salt2 tablespoonfuls of laundry bluing2-quart glass bowl Directions:Place the charcoal briquets in the bottom of the bowl. In a cup, mix together the ammonia, water, table salt and bluing. Pour the
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How do laundry detergents work?Things Required:2 medium-size jars, one with lid, filled with waterPieces of white string1 tablespoonful of liquid or dry laundry detergentDirections:Add the detergent to one of the jars. Screw the lid on, shake the jar and remove the lid. The other jar will contain only plain water. Now drop three or four
You may have used coloured inks in writing. Have you ever produced a message written with shiny crystals.Things Required:Table salt1 sheet black construction paperArt brushTeaspoonStove with an oven WARNING: An adult’s supervision is needed for the use of the oven. Directions:Add 3 teaspoonfuls of salt to 1/4 cup of water. Warm the oven to 150°F.
Do different materials have a different effect on thermometer? Find the effect of alcohol on an outdoor thermometer.Things Required:Outdoor thermometerCotton ballRubbing alcoholDirections:Lil the thermometer on a table undisturbed for three minutes; this will allow it to register the temperature of the room. Blow your breath across the thermometer bulb about 15 times. This Is What
What happens to tea when you put lemon into it?Things Required:A cup of dark tea (hot or iced tea can be used)1 lemon, cut into quartersDirections:Squeeze a little of the first piece of lemon into the tea. Continue to increase the amount of lemon in the tea until all of the quarters are fully squeezed
The purpose of all the effort is to show that salt makes it harder for water to freeze.Things Required:Two 5-oz paper cups1 tablespoonful of table saltMarking penDirections:Fill both cups one-half full with water. Dissolve 1 tablespoonful of salt into one of the cups. Mark an S on the cup containing the salt. Set both cups
What freezes first—water or orange juice? See for yourself in this experiment.Things Required:Orange juiceIce trayRefrigeratorDirections:Fill one-half of the ice tray with orange juice. Fill the remaining half of the ice tray with water. Set the tray in the freezer overnight. Remove the frozen cubes. Carefully try to bite into a cube of orange juice and
Chemists know proteins as chemical compounds. Protein called gluten is found in grains, especially wheat. Now let’s see how we can put the gluten in bread to work as a chemical.Things Required:A slice of rye breadPaper and pencilDirections:With the pencil, scribble two or three dark areas on the paper. Tear off a piece of rye
Does water expand when frozen? Find out in this easiest experiment.Things Required:1 straw1 small baby food jarRed or blue food colouringPermanent marking penClay, a piece the size of a marble Directions:Press the piece of clay against the inside bottom of the jar. Fill the jar with water. Add four or five drops of food colouring
You might have seen a Kulfi maker adding salt to ice before he freezes the Kulfi moulds. Have you ever wondered why? Find out.Things Required:1 small metal canOutdoor thermometer1 tablespoonful of table saltCrushed ice Directions:Fill the can with crushed ice. Cover the ice with water. Insert the thermometer. Wait for 30 seconds and record the
If you can add an atom, can you subtract one or release an element from a compound? Watch carefully! Oxygen will actually escape before your very own eyes in this electric and thrilling experiment.Things Required:Small amount of rust (scraped from old iron object)1 tablespoonful of hydrogen peroxideSmall bottle or jar (to hold hydrogen peroxide)Small, deep
Purpose to produce a different form of matter.Things Required:1-litre plastic soda bottle1 large balloon, 18 inches1 teaspoonful of baking soda3 tablespoonfuls of vinegarCellophane tapeDirections:Pour the baking soda into the bottle. The vinegar is to be poured into the balloon. Attach the open end of the balloon to the mouth of the bottle. Use the tape
The purpose of this easy experiment is to collect limestone and then, chemically remove it.Things Required:Small baby food jarVinegarLimewater (See experiment Making Limewater for instructions on preparing limewater.) Directions:Fill the jar with limewater. Leave the jar open and allow it to sit undisturbed for seven days. Pour out the limewater. Observe the white crust around
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How do you know if certain substances contain starch? Starch, a substance found in plants, gives us energy (sugars and fats do, too!). Chemists are especially interested in starch because it is a compound made up of carbon, hydrogen and oxygen. This experiment will help us find out if a solution has starch. Things Required:Half-litre