Cats are the popular pets around the world. They are loved by most of the people and have been with humans for thousands of years. Cats are the carnivores; means they eat meat. They belong to the scientific family ‘Felidae’. There are two subfamilies belonging to Felidae, which are Pantherinea and Felinae.
Pantherinea: This subfamily includes the big cats, which are tigers, lions, jaguars, and leopards.
Felinae: This subfamily includes the medium to small sized cats, which are cheetahs, lynx, and off-course the domesticated cats. This article describes the domesticated cats.
What do they look like?
Cats have a flexible body with a head, four legs, and a tail. Their body is covered with fur, which gives them the smoothness and insulates their bodies. Cats have a wide range of colors with and without patterns. They are equipped with two eyes, which help them to see in the darkness. They can see objects in 6 times less light required by humans to see. Their nose is very sensitive, about 14 times much sensitive than humans. They can smell rodents and food from a great distance. Cats have 32 muscles in their ears, which give them the flexibility to rotate their ears to all direction. As a result, they can focus their ears to hear small sounds from a particular direction. All these abilities make the cat a good hunter.
Cats are carnivores, they love to eat meat. People usually give them cooked chicken, beef, and fish. Cats are also good hunters; they prey on the rodents to eat them. Many people around the world domesticate the cats to get rid of rodents.
Cats become good friends of humans very quickly. People around the world domesticate the cats, so they are found in almost every city in the world. Many unclaimed cats around the world are often found on the roads and streets of the urban areas. They try to shelter on the corners of some buildings and eat the rotten food thrown by humans and rodents.
- Ancient Egyptians considered the cats as sacred animals.
- Cats can make more vocal sounds than a dog.
- Cats can learn how to use the toilet, they can even flush!
Whales are the wonderful creatures on the planet Earth. They are the largest living animals among all land and oceans animals. Even the biggest dinosaurs that once lived on the Earth are smaller than the whales. Whales are mammals and there are two types of the whales according to the way they eat. They are toothed whales and baleen whales.
What do they look like?
The largest species of the whales are blue whales. They have a length between 80 to 90 feet and weigh up to 200 tons. Whales generally have cigar shaped bodies and a flat head. But, their necks are not flexible to turn around. They have flippers, a dorsal fin, and a large tail fin on their bodies to help them steer in the ocean. They have a blowhole on top of their heads for breathing oxygen from the air. Because they can’t breathe underwater like fishes. Different species of whales have different color shades, which are black, gray, brown, grayish blue and white.
Whales are divided into two types according to their way of eating; Baleen whales and toothed whales. Baleen whales don’t have teeth to crush the food. Instead, they have comb-like filters called baleens. They mostly feed on krill and planktons. Toothed whales have teeth so they like to eat a wide variety of fishes including cod, salmon, tuna, and seals. It is estimated that a blue whale can eat as much as 8,000 pounds of krill each day.
Habitat of Whales
Whales are the migrating animals, covering few thousand miles each year. They are found in all the major oceans around the world. The major factors of their migration are climate conditions and food supply.
Whales are placed in endangered species list by U.S Endangered Species Act II. The number whales had decreased dramatically in oceans due to overhunting. But thanks to International Whaling Commission, which placed a catch limit for each country. The number of whales is seemed to increase in the oceans.
- There are 75 species of whales living in all the major oceans of the world.
- Blue whales produce sound between 10 to 30 Hz frequency for signaling each other. Humans can listen the sound from 20 Hz and above.
- Blue whales are so big that, their hearts are about the size of an average car.
- Whales have the life span around 90 years. But, the longest living whale was found to live more than 200 years.
- Whales need to come at the surface of the ocean for breathing. If they remain underwater too long, they may drown.
- The spout from the blowhole of the whale can reach a height of 30 feet. It is visible from miles away.
Weather is the part of everyone’s life. Every day we go outside and find different weather from the previous day. Sometimes it is raining, sunny, or cloudy. Weather is different at different locations at the same time. For example, it can be raining in one area, while sun shining on the other area. We often plan our picnics after knowing about the weather.
What is Weather?
Weather is the condition of our atmosphere at any time of the day. For example, our atmosphere may be hot, dry, wet, cold, stormy, and calm. The study of weather is called meteorology, and the person who studies meteorology is called meteorologist.
Parameters of weather
Weather is defined by the parameters, that are measured with sensors. These parameters include temperature, pressure, wind speed, and humidity.
- Temperature: The temperature tells how hot it is today. Temperature changes all the day. For example, it is hot during the afternoon, and cold during the night.
- Pressure: Pressure is the weight of the air on the surface of the Earth. The pressure of the air varies slightly for many reasons. This change in pressure develops the wind.
- Wind Speed: It determines how fast the air is moving in an area.
- Humidity: Humidity tells the amount of water mixed with air. Humidity in air leads many weather phenomena like rain, clouds, fog, and snow.
It is often necessary to know the weather of the particular day in advance. This will help people to plan their activities according to the weather pattern. The prediction of weather in advance for the upcoming days or months or even years is called weather forecasting.
Weather phenomena are the weather events that occur around the world. These phenomena include some common events like clouds, rain, wind, fog, and snow. There are some weather phenomena that are not very common, these include hurricanes, tornadoes, and typhoons.
- Nearly 2,000 thunderstorms are recorded around the world at any moment.
- About 100,000 thunderstorms hit the US each year.
- The south pole is the least sunny place on the Earth.
What is Water Pollution?
Have you ever seen the dirty water coming out of the factories? This is the contaminated water which contains toxic chemicals. When harmful chemicals mix with water, it is called water pollution. Even the water mixed with dish washing soap in your kitchen is also contaminated water. You can’t drink that water and it is also harmful to animals.
Causes of Water pollution
Water is polluted in two ways. One is natural water pollution and other is human-made water pollution. But, Water is highly contaminated with human activities.
- Natural Causes: There are many natural activities and processes that contaminate the water. These activities are volcanic eruptions, storms, increased algae population in water, and animal wastes.
- Human causes: Human-caused water pollution is very high. Water is polluted because of the chemicals from factories, agriculture pesticides and fertilizers, and sewage mixes with the fresh water. Although many developed countries have regulation for reducing water pollution by filtering the contaminated water before disposing of.
Contaminated water from the factory is polluting the clean water.
Effects of Water Pollution
Water is the basic ingredient of life, without water life is not possible on Earth. Every living thing needs water for the survival. When the water becomes contaminated and used by living things can make them sick and possibly result in the death. More than 1 billion people on Earth don’t have access to clean water. As a result, diseases and deaths are common in these areas.
Water pollution can highly damage the environment. When the pollution in the water increases the dissolved oxygen in the water decreases. The decrease in dissolved oxygen suffocate the fishes and may result in their death. Many fishes eat contaminated chemicals in the water and get infected by them. When humans and other animals eat these fishes, they also become infected.
How can you help?
If you want to avoid contributing to water pollution, you can follow these steps:
- Don’t waste clean water.
- Don’t throw any litter or chemical in any river, pond, or even oceans.
- Always throw your trash into the recycle bins
- Tell others about water pollution and the ways to reduce them.
What is the season?
The year of the Earth is divided into four seasons. There are four seasons in a year, which are summer, autumn, winter, and spring. The seasons cause significant changes in the weather and our environment. The summer is hot and the winter is cold. Leaves change their color to pale yellow in the autumn. Seasons also change the lifestyle of human and animals. For example, we cover our bodies with jackets and coats. While we used to wear thin fabric clothes in summer.
Summer is hottest among the four seasons. In this seasons, the days are longer than the nights. When summer arrives in the southern hemisphere, then it is winter in the northern hemisphere. Many crops, like wheat, are harvested near the summer end.
Autumn is the conversion period between the summer and the winter. This season arrives as the summer ends. In this season the temperature starts to drop until winter arrives. Leaves of the trees fall and change their color to pale yellow.
Winter is the coldest season. It snows in many places during the winter. We change our lifestyle to live comfortably in winter. We try to insulate our bodies with coats to keep our bodies warm. Many people enjoy drinking coffee in the winter. The nights of the winter are longer than a day. Many animals migrate from one place to other to reach the warmer areas.
Much like autumn, spring is the conversion period between summer and winter. But, this time the temperature starts to increase in the spring. It is the very beautiful season among all other. It is sometimes called the season of regrowth. In this season, trees start to grow new leaves and seem to come to their lives again.
Why seasons occur?
Seasons occur because of the tilt of the Earth’s axis. The axis of rotation of the Earth is not straight, but it is slightly tilted, which give rise to seasons.
How do seasons change?
Our Earth completes one revolution in the orbit around the Sun in one year or 365 days. The sunlight that each part of the Earth receive, changes as the Earth moves in the orbit. This is because of tilt in the Earth axis of rotation. Due to this tilt, the Sun points northern hemisphere for half year and southern hemisphere for the second half year. As a result, the season of the Earth changes. The season of the northern hemisphere is opposite to that of the southern hemisphere.
How seasons change
Interesting Facts about seasons
- Plants lose their leaves in autumn in response to decreasing length of the day.
- Animals find the winter hard because it is difficult for them to find food.
- Plants produce fruits and vegetable in their seasons. Eating seasonal fruits and vegetable will make you healthy.
- Some trees remain green in all four seasons. These trees are called evergreen trees.