Class: 6
Subject: Science
Answer the following question:
1 a. State the difference between reversible and irreversible changes.
b. What are physical and chemical changes?
c. Iron expands on heating. Is this physical or chemical change? Explain your answer.
d. Define the following: i.Endothermic reaction ii. Exothermic reaction
2 a.When is work done by force?
b.What are potential and kinetic energy?
c. What is chemical energy? Where did the chemical energy stored in coal and petroleum come from?
d.A man pushes a card with a horizontal force of 20 N. How much work does he do in moving the card through a distance of 50 m?
3 a.What is meant by pollination? Mention some agent of pollination.
b.What is fertilization?What is the result of fertilization?
c.What are the function of roots?
d. Why potato regarded as a stem?
e.Draw and label the parts of a typical flower.
Subject: Science
Answer the following question:
1 a. State the difference between reversible and irreversible changes.
b. What are physical and chemical changes?
c. Iron expands on heating. Is this physical or chemical change? Explain your answer.
d. Define the following: i.Endothermic reaction ii. Exothermic reaction
2 a.When is work done by force?
b.What are potential and kinetic energy?
c. What is chemical energy? Where did the chemical energy stored in coal and petroleum come from?
d.A man pushes a card with a horizontal force of 20 N. How much work does he do in moving the card through a distance of 50 m?
3 a.What is meant by pollination? Mention some agent of pollination.
b.What is fertilization?What is the result of fertilization?
c.What are the function of roots?
d. Why potato regarded as a stem?
e.Draw and label the parts of a typical flower.
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