Question

Q2) True and False:
1) Tooth decay is caused by the presence of a base.
2) Iron and rust are the same substances.
3) In the polar region temperature can be a low as -37 degree
4) Air around us exerts temperature.
5) Percolation is highest in the sandy soil.
6) The fishes have lungs for respiration.
7) Circulatory system not consists of the heart and blood vessels.
8) All changes in the weather are caused by the moon.
9) Formation of manure from leaves in a physical change.
10 Nitric acid turn red litmus blue.​

Answer 1

1. false
2. false
3. false
4. false
5. true
6. false
7. false
8. false
9. true
10. false

here are your answer . hope it will help you.