STOP SMOKING • MATERIALS NEEDED • A clear plastic bottle. • A teat of a baby bottle. • A deep container. • A cigarette. • Water and cotton. • A match or lighter. • Awl or a sharp element. • PROCEDURE • Fill the bottle with water. • Make the teats hole bigger so as you can introduce the cigarette on it.. • Put some cotton inside the teat and fix the teat in the bottle rim. • Using the awl make a small hole on the bottom of the bottle which you are going to cover and uncover . • Put the bottle into the deep container and light the cigarette. • After finishing the experience have a look at the cotton. HYPOTHESIS: The tar gets sticked into the lungs.
Having a look and... ...smellingtheresult
As in the cotton, the tar gets sticked into the lungs
CHANGING LIGHT ‘S direction • MATERIALS NEEDED • A shoes box • A clearglasscontainerwithstraight faces • Scissors • Water • A torch HYPOTHESIS: The light changes its direction when it crosses the water. • PROCEDURE • Cut a narrow slot in oneface of the box. • Putthewaterintotheglasscontainer. • Putthecontainerintothe box. • Switchonthetorch and putitintothe slot. • Notice: Whathappens? • Suggestion : performtheexperiment in thedarkness. CONCLUSION REFRACTION The light movesslowerinsidethewaterthan in the air.
ENERGY AND LIGHT The light changes its direction when it crosses the water. The light movesslowerinsidethewaterthan in the air
HOW DOES MOULD GROW • Get these materials ready • two slices of fresh bread • two glasses of water • two tablespoons of sugar • two plastic bags • Follow the instructions • Wet one of the slices of bread with water. Put the bread into a plastic bag and close the bag well. Label the bag “without sugar”. • Put two tablespoons of sugar into a glass of water. Mix the sugar and water well. Wet the second slice of bread with the sugar water. Put the bread into a plastic bag and close the bag well. Label the bag “with sugar”. • Put the bags with the bread in them in a dark place, at normal room temperature.
A week before
A TERRARIUM FOR EARTHWORMS
s i e n c e c LH 4 and LH 5 2010 - 2011 2011- 2012 IKASTURTEAK