10 useful changes and 10 harmful changes and 10 periodic changes and non periodic changes
Answers
Changes that are harmful :
(a) Burning of coal,plastic,wood and other substances that release CO,SO2.
(b) Cutting of trees leading into soil erosion,fall in O2 levels in air etc.
(c) Contamination of rivers.
Periodic changes:
a)Day and night
b)Changing phases of the moon
c) Beating of heart
d)Clock striking an hour
Non periodic changes:
a)Water becoming ice
b)Burning of matchstick
Useful changes:
a)Turning off electric/electronic appliances when not in use
b)Turning off the engine of the vehicle while waiting at a traffic signal
c)Recycling old newspapers by converting them into carry bags
d)Stop using plastic and similar harmful substances that cause environmental degradation
e)Carpooling to your workplace with colleagues who stay in the same locality as you so that you can save fuel
f)Cooking on a low flame instead of high flame
g)Ensuring that the water taps are closed properly after use
h)Using organic compost as manure for the garden instead of chemicals
i)Replacing ordinary light bulbs with their compact fluorescent counterparts to save energy
j)Maintaining an optimum speed when driving the car instead of going at a very high speed
Answer:
10 Useful changes:
Positive environmental changes are necessary for the balance of our ecosystem.
Examples of useful environmental changes are:
1) Climatic changes throughout the whole year.
2) Migratory species habitat changes throughout the whole year.
3) Flower changes into fruits.
4) Honey bee transporting pollens from one flower to another.
5) The changes in the soil happened through the natural fertilizing agents.
6) The establishment of national parks.
7) The establishment of sanctuaries.
8) The green vegetation implementation in the local parks.
9) Usage of eco-friendly products.
10) Usage of renewable energy sources.
11) Less usage of fossil fuels.
12) Less usage of vehicles with very old engine.
13) Less usage of non-biodegradable substances.
14) Recycling and uplcycling of different resources.
15) Conservation of different resources in the various aspects of our environment.
10 harmful changes
- Shredding paper.
- Burning tires.
- Polluted air.
- Dumping of garbage.
- Throwing the garbage in the river.
- Burning of coal,plastic,wood and other substances that release CO,SO2.
- Cutting of trees leading into soil erosion,fall in O2 levels in air etc.
- Contamination of rivers.
- Milk turning sour and food getting spoilt
- rusting of iron
- breaking of a window pane
- a forest fire