The given diagram shows the positions of four different objects after they have been dropped into a trough of water. Which of the following correctly matches the objects used?
A 1- Ping pong ball, 2 – marble, 3 - crushed aluminium foil, 4 - iron rod
B 1 – Ping pong ball, 2 – iron rod, 3 – crushed aluminium foil, 4 – marble
C 1 – Crushed aluminium foil, 2 – ping pong ball, 3 – iron rod, 4 – marble
D1 – Crushed aluminium foil, 2 – iron rod, 3 – marble, 4 – ping pong ball
plz explain how
A food chain in an aquarium is shown below.
Water plants → Guppy fish → Angelfish →Snakeheads
If the snakeheads were removed, which graph shows the changes in the population of organisms in the aquarium?
Sunita prepared two cups of water (one hot and one cold), and then covered them. Look carefully at the results she obtained after 2 minutes.
Which of the following statements about the results is not true?
(B) Water particles from the hot water condense when they meet the cool inner surface of the metal cover.
(C) The insulated sides reduce heat loss or gain from the sides of the cup.
(D) When the heated particles of water vapour present in the air above the hot water hit the cold cover, they lose heat and condense.
what is the correct answer and how ?
Four different-sized beakers are filled with water up to the same height. The temperature of the water is same in all four beakers. If we put 100 gram of ice in each beaker, what effect will occur?
A The water temperature in beaker 2 will change the most.
B The ice will melt fastest in the beaker 3.
C The temperature changes will be same in all four beakers.
D The temperature of the water in beaker 3 will change the most.
In the OSDS, this question is there.The solutions say-(The temperature changes will be same in all four beakers)-this is the answer.
It looks like a bear but is not. It spends almost 17 hours a day sleeping while hanging upside down on a tree branch. It lives for about 40 years and in that time moves around only eight trees.
The animal referred to in the above paragraph is
A place ‘X’ receives high rainfall but only during a particular season. For the rest of the year, the area remains very dry.
What would you suggest to the citizens living in ‘X’ do to make sure the water remains available throughout the year?
AReduce the wildlife
BConstruct more wells
CStart harvesting rainwater
DReduce the mining activities in the area
Ram and Shyam have performed the experiment to separate sugar from water, as shown in the figures.
Which of the following statements are incorrect?
1. Method 1 is slower than method 2.
2. Method 2 leads to the decomposition of sugar to carbon.
3. Method 1 is more appropriate than method 2.
4. Method 2 is slow but pure sugar is obtained without getting decomposed.
B1, 2, 3
Which one of the following statements is true?
AA concentrated solution has a small amount of solute dissolved in a large amount of solvent.
BA dilute solution has a small amount of solute dissolved in a small amount of solvent.
CA dilute solution has a small amount of solute dissolved in a large amount of solvent.
DA concentrated solution has a large amount of solute dissolved in a large amount of solvent.
Rohit heated four beakers as shown below :
The correct order of evaporation of water is
AII > I > IV > III
BI > IV > II > III
CIV > I > III > II
DI > II > IV > III