Select the material that undergoes the change.
Boiling an egg.
Important Questions on Changes Around Us
Select the material that undergoes the change.
Atta that is kneaded to make the dough
Select the material that undergoes the change.
An electric clock that stops working
Complete the sentence by selecting the right option after reading the paragraph.
Salt, Cement, Sand and Sawdust were playing together when Water came along. "May I join you?", asked Water.
"No.", said Salt. " My mother said that if I play with you I will
Salt, Cement, Sand and Sawdust were playing together when Water came along. “May I join you?”, asked Water.
“No,” said Cement. My mother said that if I play with you, I will.
i) Salt, Cement, Sand and Sawdust were playing together when Water came along. "May I join you?", asked Water. Following are the responses of the four:
(a) "No.," said Salt. " My mother said that if I play with you I will (dissolve / contract)."
(b) "No.," said Cement. " My mother said that if I play with you I will (harden / melt)."
(c) "No.," said, Sand. " My mother said that if I play with you I will (dissolve/settle at the bottom)."
(d) "No.," said Sawdust. " My mother said that if I play with you I will (evaporate/float on the top)."
Which of the four changes described in (i) is an irreversible change? Explain your answer.
Read the statement and select the correct answer.
Early in the morning, you may find dewdrops on leaves and grass. When the sun rises, the dewdrops disappear.
Which process causes the formation of dew?
Read the paragraph and select the correct answer.
Early in the morning, you may find dewdrops on leaves and grass. When the Sun rises, the dewdrops disappears.
Which process causes the dew to disappear later in the day?
Read the paragraph and select the correct answer.
Early in the morning, you may find dewdrops on leaves and grass. When the Sun rises, the dewdrops disappears.
What type of change is this?
