Question

Answer the following Questions:
Q1. Which acid is present in ant’s sting?
Q2. What colour do you get when we put the following indicator in acid?
Phenolphthalein
Methyl Orange
China rose
Turmeric
Q3. Which soil is the best for growing crops?
Q4.What is the name of blood vessels which connect the arteries with veins?
Q5. How plants such as ferns and mosses do reproduces?
Q6.While playing in a park, a child was stung by a wasp. Some elders suggested applying paste of baking soda and others lemon juice as remedy. Which remedy do you think is appropriate and why?
Q7. How does transpiration help in the transport of water and minerals in plants?
Q8.What is pollination? How is self pollination different from cross pollination?
Q9. What is the heating effect of electric current? Name some devices that work on the heating effect of electric current.
Q10. A person is standing in front of a big plain mirror. The distance between the mirror and his image is 5m. If a person moves 2m towards the mirror, what will be the distance between the person and his image?

Q11. Describe any two methods of asexual reproduction?
Q12. Describe the process of neutralization with the help of an example? Write a word equation for
neutralization reaction between hydrochloric acid and sodium hydroxide.
Q13. What is meant by soil profile? Draw a sketch of the soil profile and label its various parts?
Q14.The soil in a field is highly acidic. Name two materials which can be added to this soil to reduce the acidity.
Give reason for your choice.

Q15. What is overloading? Why a fuse is necessary in a circuit, the use of a fuse is based on which effect of electric current?
Q16. Define speed? What is the speed of a truck that covers 1822 km in 2 hours?

Q17. What is the function of a flower? Draw a well labeled diagram of the reproductive parts of the flower.
Q18. Why is it necessary to excrete waste products? Draw a well labeled diagram of the human excretory system.
b) Draw a flow chart of human circulatory system?
Q19. Label the diagram of Human Excretory System:-


Q20. a) Give two advantages of electromagnet over a permanent magnet.
b) Draw a labeled diagram of an electric bell.

Activities: Dear Students do these activities and make videos of only 2 mins



Home-based: Theme: Result of a flame test of fabrics.
Material required: strands of varieties of thread i.e. silk, cotton, wool,
Polyester, nylon, candle, matchbox.
Procedure: burn the strands one by one and write down your observation on
The following parameters: movement of fiber on flame, smell,
Residue left, on burning.(for more details read pg. No. 47 of your book).



Kit based: Theme: to measure the rate of percolation of sandy and clayey soil
Material Required: 2-liter soft drink bottle, two plastic PVC pipes,
Measuring cylinder, water, the sample of soil, stopwatch.
Procedure: Read the instruction on pg no. 124 of zoom book.

Answer 1

Explanation:

bomb, and harass the predator to drive it away."

"If the alarm is strong enough, it travels through the colony like a wave."

"People who walk near colonies of nesting birds often get mobbed in the same way that a fox, a coyote, or an eagle might."

"When one bird in a colony spots a predator, it flies up and sounds an alarm."