Electricity
What are the two terminals of an electric cell?
Negative terminal and Positive terminal
What is another name for Lodestone?
Lodestone is also called as Magnetite
What is the purest form of water?
Rain water
Name the 5 layers of atmosphere
The Snow Makes Things Exciting!
Troposphere, Stratosphere, Mesosphere, Thermosphere, and Exosphere.
What are carcinogenic wastes?
Cancer-causing toxic wastes.
Are accumulators used in mobile phones?
Yes, they are secondary cells
Name the 2 types of magnets
Natural and Artificial
Name the 2 types pf Rainwater harvesting?
and, Explain any 1
Roof-top rainwater harvesting = water collected on rooftops is allowed to flow through pipes and collect in tanks.
Pits or Tanks = water from low-lying areas is allowed to flow into lower tanks and repurpose ground water.
Explain the oxygen cycle
1. Oxygen given by plants s taken by animals
2. Carbon dioxide given by animals is utilized by plants through photosynthesis.
How will you do away with plastic, mention any 2 ways?
1. Avoid using them
2. If not possible, reuse them as many times as possible
3. Dispose them correctly
Why does a bulb prefer a tungsten filament?
Tungsten has a high melting point that prevents it from fusing.
Are Iron, Cobalt, and Nickel used to make temporary magnets?
(True/False)
TRUE
Suggest any 3 ways to conserve water.
1. Avoid unnecessary flushing.
2. Collect water from bathing to use for plants.
3. Do not leave taps running if not in use
Name 2 harmful effects on absence of Ozone layer
Skin Cancer
Eye disorders.
What is the role of decomposers?
Decomposers degrade organic material and provide nutrition to soil for new plants to grow.
What is the difference between a dry cell and a windmill?
Dry Cell = Portable source of electricity
Windmill = Static or Stationary source of electricity
What is magnetic force?
The force of attraction with which a magnets attracts magnetic substances.
Difference between pesticides and herbicides
Pesticides are chemicals that kill pests.
Herbicides are chemicals that kill herbs.
What are pollutants?
The undesirable substances in the atmosphere that cause pollution are called pollutants.
Name the waste that is collected in GREEN, BLUE, and RED bins.
GREEN = Compost, organic waste
BLUE = plastic, metal, glass
RED = used syringes, used cotton, bandages
What does an Ammeter indicate?
An ammeter indicates the flow of energy in an electric circuit
Give 2 ways to store magnets
1. Place the magnets with their unlike poles on same side.
2. Separate the magnets using a wooden block
3. Place soft iron bars on the edges of the 2 magnets as magnetic keepers.
Give the 2 special properties of water
1. Ice is less dense than water (due to the void space in the solid structure).
2. Water expands on cooling and contracts on heating.
Why is rate of photosynthesis different during the day and night?
During the day, rate is photosynthesis is high due to presence of sunlight.
At night, is lower due to absence of light
Name the 5Rs and explain any 2 with examples
Refuse, Reduce, Reuse, Recycle, and Reform