STD 6 Science Chapter -4

Explanation
The correct answer is "Natural" because floods are a frequently occurring disaster in all parts of the world that are caused by natural factors such as heavy rainfall, melting snow, or dam failure. They are not man-made disasters, which would be caused by human activities such as industrial accidents or infrastructure failures.

Explanation
The correct answer is 101 because in many countries, including the United States, 101 is the emergency telephone number for the fire brigade. It is important to know this number in case of a fire emergency as it allows individuals to quickly and easily contact the appropriate authorities for help.

Explanation
The given question is incomplete and not clear. It seems to be asking for a missing number or word related to an ambulance, but without any context or further information, it is impossible to determine a correct answer or provide a meaningful explanation.

Explanation
The correct answer is 108/112 because these are the national level single emergency numbers for disaster relief. These numbers are widely recognized and used in many countries as a way for individuals to quickly access emergency services during times of disaster. By dialing these numbers, individuals can receive immediate assistance and support from trained professionals who are equipped to handle various types of emergencies. These numbers are crucial in ensuring the safety and well-being of individuals affected by disasters.

Explanation
The given question is asking for the type of disaster that is not man-made. The correct answer is "Natural" because natural disasters are events that occur due to natural processes and forces, such as earthquakes, hurricanes, floods, and wildfires. These disasters are not caused by human activities or interventions.

Explanation
Floods occur due to heavy rain when the amount of rainfall exceeds the capacity of the land to absorb it. When the ground becomes saturated, the excess water flows over the surface, causing rivers and streams to overflow their banks and inundating surrounding areas. Heavy rain can lead to flash floods, river floods, and urban flooding, causing significant damage to infrastructure, homes, and loss of life. Therefore, heavy rain is the most likely cause of floods.

Explanation
The given question states that there are nearly a certain number of species of snakes. Out of the options provided, the correct answer is 2000. This means that there are approximately 2000 different species of snakes.

Explanation
In a dog bite, there is a risk of infection through the blood. When a dog bites, its teeth can puncture the skin and introduce bacteria from its mouth into the bloodstream. This can lead to infections such as cellulitis or even more serious conditions like sepsis. It is important to clean the wound thoroughly and seek medical attention to prevent and treat any potential infections.

Explanation
Sarpa-mitra refers to a term in Sanskrit, where "Sarpa" means snake and "mitra" means friend. Therefore, Sarpa-mitra translates to "snake friend" in English.

Explanation
Floods can indeed occur due to heavy rainfall. When there is excessive rainfall, the ground becomes saturated and unable to absorb all the water, leading to surface runoff and overflowing rivers and streams. This excess water can cause flooding in low-lying areas and pose a threat to human lives and property. Therefore, the statement "Floods due to heavy rainfall" is true.

Explanation
The given answer is false because there are actually two main kinds of disasters: natural disasters and man-made disasters. Natural disasters occur due to natural forces such as earthquakes, hurricanes, floods, etc., while man-made disasters are caused by human activities like industrial accidents, terrorism, wars, etc. Therefore, disasters are not only man-made but can also be caused by natural forces.

Explanation
Floods are indeed a frequently occurring natural disaster in all parts of the world. They can be caused by heavy rainfall, melting snow, or dam failures, and can lead to significant damage to infrastructure, loss of life, and displacement of populations. Floods can occur in both developed and developing countries, and their frequency and severity can vary depending on factors such as climate, topography, and land use. Therefore, the statement "Frequently occurring natural disaster in all parts of the world is floods" is true.

Explanation
This statement is stating that not all snake bites are fatal, meaning that some snake bites may not result in death. Therefore, the correct answer is True, as it is possible for someone to survive a snake bite.

Explanation
In a dog bite, there is a risk of infection through the skin and soft tissues surrounding the bite, but not through the bones. The bacteria present in a dog's mouth can cause infection if they enter the bloodstream through the bite wound. However, bones are not typically involved in this process. Therefore, the statement that there is a risk of infection through the bones in a dog bite is false.

Explanation
A sudden calamity refers to an unexpected and disastrous event that causes significant damage or loss. It is commonly known as a disaster because it typically results in widespread destruction, loss of life, and disruption to communities or the environment. Therefore, the statement "A sudden calamity is known as a disaster" is true.

Explanation
Heat stroke is actually caused by working long hours in extreme heat, not cold. When the body is exposed to high temperatures for a prolonged period of time, it can lose its ability to regulate its own temperature, leading to heat stroke. This can be a serious and potentially life-threatening condition that requires immediate medical attention.