100 day activity

Take a new iron nail, a gold item (ring or chain) and a silver item (ring or chain) during rainy weather. See that these are exposed to the effects of moist weather for a few days (3 to 4 days). 1) What changes are observed to all these items in the moist air? 2) How will you ..

To study the action of pepsin on proteins - Boil egg white in distilled water till a cloudy suspension is obtained. Cool it and divide the mixture into five equal portions in separate test-tubes. Label them A to E. Add different substances to each of the five tubes as shown in the table below and e..

Food Recommended amounts (g per day) Adult Man Adult Woman Cereals (rice/wheat) 520 440 Pulses 50 45 Meat/Fish 30 30 Egg 1 1 Milk 200 150 Oil/fats 45 25 Sugar/molasses 35 20 Roots and tubers (potato, etc.) 60 ..

Study the rainfall patterns in India from an atlas and identify where water is abundant and the regions of water scarcity. Did You Know? One of China's major rivers, the Yellow River, has run dry for part of the year since 1985. And in 1997 it failed to reach the sea for 226 days..

Tests for Minerals in Plant Ash - Take a herbaceous plant and cut it into small pieces. Place them in a porcelain crucible in an oven at 100 o C and dry overnight. The dried plant material is then heated to approximately 600 o C in a muffle furnace or over a burner till it is changed to a..

It was observed by Fujino (1967) that opening of stomata occurs due to the influx of K + ions into the guard cells. The source of K + ions are the neighbouring subsidiary and epidermal cells, there by increasing the concentration from 50mM to 300mM in guard cells. The increase in K + ion c..

Every day, Olga spends 3 hours and 20 minutes in painting and 4 hours 50 minutes for reading books. How much time does she spend on both the activities? => 8 hours 5 minutes or 3 hours 20 minutes or 7 hours 70 minutes or 8 hours 10 minutes..

A certain radio active isotope has half - life of 20 days. If one starts with 80 kg of the isotope, then how much is left after 8 days? => 60 kg or 36 kg or 42 kg or 32 kg or 38 kg..

Sam has breakfast at 8:30 am , lunch at 1:00 pm and dinner at 8:30 pm . He spends half an hour for each activity. Find the total time he spends for the three activities. => 2 hours or 1 and 1 2 hours or 2 and 1 2 hours or 3 hours..

Teresa got a new job where she earned $100 per day in the month of June. How much more does she earn if her daily earnings are $120? => $600 or $300 or $20 or $100..