Q1: Give the scientific reason for each of the following statement.
a.
Plants can prepare their own food.
b. Stomach contains strong acid Hcl.
3
con fondos
C. Helium is used to fill air balloons.
Answers
Answer:
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1. Plants are called producers because they make – or produce – their own food. Their roots take up water and minerals from the ground and their leaves absorb a gas called carbon dioxide (CO2) from the air. They convert these ingredients into food by using energy from sunlight.
2. Stomach acid's low pH level is largely attributable to one ingredient: hydrochloric acid (HCl). However, there's only a very small amount of HCl in stomach acid. Other components include potassium chloride (KCl) and sodium chloride (NaCl). The cells lining your stomach wall secrete this acidic trio
3. The gases like hydrogen and helium are used in the balloons because they are lighter than the air. But helium is more preferable than hydrogen because helium is non-combustible and that's why it is more safe to use.
Answer:
a) because leaves make food for plants.