Download App

Physical and Chemical Changes — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7SciencePhysical and Chemical Changes2 Marks
Question
Classify the following processes into physical or chemical changes:
  1. Beating of aluminium metal to make aluminium foil.
  2. Digestion of food.
  3. Cutting of a log of wood into pieces.
  4. Burning of crackers.
✓

Answer

Physical changes are beating of aluminium metal to make aluminium foil and cutting of a log of wood into pieces. Chemical changes are digestion of food and burning of crackers.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Physical and Chemical Changes→Physical and Chemical Changes — all question types→Science STD 7 question papers→Gujarat Board STD 7 question papers→Gujarat Board question paper generator→

Similar questions

Write short notes on Overloading.
→
Explain radiation.
→
Making popcorns from corns is what type of change?
→
What are secondary sexual characteristics? Provide examples in boys and girls.
→
Sunlight, chlorophyll, carbon dioxide, water, and minerals are raw materials essential for photosynthesis. Do you know where they are available? Fill in the blanks with the appropriate raw materials.
(a) Available in the plant : ______
(b) Available in the soil : ______
(c) Available in the air : ______
(d) Available during day : ______
→
Plants prepare their food by a process called photosynthesis. Can we call photosynthesis is a chemical change? Explain.
→
The terms sewage, sewers and sewerage are interlinked with each other. Can you explain, how?
→
Mary and Manoj were classmates and good friends. On turning 11, Mary developed a little bulge on the front of her neck. She visited the doctor who gave her medication and asked to take iodine-rich diet. Similarly, a bump developed on the front of Manoj’s neck when he turned 12. However, the doctor told him that it was a part of growing up. According to you, what could be the possible reason for advising Mary and Manoj differently?
→
What do you mean by a closed circuit with respect to the on-off switch?
→
Which of the two changes frequently, and why?
→