Science Facts Set-31

• Giant tortoises move very slowly in dry land with a speed of 0.27 km/h.
• Giant kelp is an alga that grows to more than 45 metres in length.
• About 20-30% of the Earth's photosynthetic production is done by Cyanobacteria (blue-green algae).
• Nitrogen was discovered by Daniel Rutherford, a Scottish physician in the year 1772.
• A capacitor is a device used for storing electric charge.

• The surface area of planet Neptune is 14.98 times the surface area of the Earth.
• The average life span of a domestic horse is 25-30 years.
• About 97% of the surface water of the Earth is in the oceans.
• Spotted hyenas often crash with lions for food and territory.
• About 90% of the diet of a house sparrow are seeds.