Matter In Our Surroundings Questions With Answers Class 9

The different states of matter include solids, liquids, and gases. Solids have a fixed shape and volume, while liquids have a fixed volume but can change shape. Gases have neither a fixed shape nor volume and can expand to fill any container. Therefore, the correct answer is "All of these" because it includes all three states of matter.

The correct answer is "Small" because particles of matter refer to atoms, which are the smallest units of matter. Atoms are composed of subatomic particles such as protons, neutrons, and electrons. These particles are incredibly tiny and cannot be seen with the naked eye. Therefore, the option "Small" accurately describes the size of particles of matter.

Particles of matter are continuously moving, indicating that they have kinetic energy. Kinetic energy is the energy possessed by an object due to its motion. Since the particles are in constant motion, they possess kinetic energy. Potential energy refers to the energy stored in an object due to its position or state, and electric energy is related to the flow of electric charges. Therefore, the correct answer in this case is kinetic energy.

Clouds, stars, and stones all belong to matter because matter is anything that has mass and occupies space. Clouds are made up of water droplets or ice crystals, which have mass and occupy space. Stars are massive balls of gas, mainly hydrogen and helium, which also have mass and occupy space. Stones are solid objects made up of minerals or rocks, which again have mass and occupy space. Therefore, all of the above options belong to matter.

The correct answer is "Both of these" because matter refers to anything that has mass and takes up space. Mass is a measure of the amount of matter in an object, while volume is a measure of the space occupied by an object. Therefore, both mass and volume are characteristics of matter.

The correct answer is "Faster" because according to the kinetic theory of matter, as temperature increases, the average kinetic energy of particles also increases. This increase in kinetic energy leads to faster movement of particles. Therefore, as the temperature rises, particles move faster.

As temperature increases, the kinetic energy of particles also increases. This is because temperature is a measure of the average kinetic energy of particles in a substance. When the temperature rises, the particles gain more energy and move faster, resulting in an increase in their kinetic energy. Therefore, the correct answer is "Increases".

Liquids have no fixed shape but have a fixed volume because the particles in a liquid are close together but not arranged in a regular pattern like in solids. This allows liquids to flow and take the shape of their container. However, the intermolecular forces between the particles are strong enough to keep the volume constant.

The statement "All of these" is the correct answer because it accurately summarizes the characteristics of solids. Solids have a definite shape, meaning they maintain a fixed and specific form. They also have distinct boundaries, which means they have a clear and well-defined outer surface. Additionally, solids have a fixed volume, meaning they occupy a specific amount of space and do not easily compress or expand. Therefore, all of these characteristics apply to solids.

When particles are heated, they gain kinetic energy and move faster. This increased movement leads to a higher rate of diffusion. As the particles move more rapidly, they collide with each other and with the surrounding medium more frequently, allowing for faster diffusion of substances. Therefore, heating the particles is a way to increase the speed of diffusion.

The characteristics of particles of matter include the presence of intermolecular spaces, constant motion, and attraction to each other. This means that particles are not tightly packed together, but have space between them. They are also constantly moving, which is known as Brownian motion. Additionally, particles are attracted to each other through intermolecular forces, such as van der Waals forces or hydrogen bonding. Therefore, all of these statements accurately describe the characteristics of particles of matter.

Diffusion refers to the process of intermixing particles of two types of matter on their own. It occurs when particles move from an area of high concentration to an area of low concentration, resulting in a uniform distribution. In diffusion, there is no external force or energy required for the mixing to happen. This process is commonly observed in various natural phenomena, such as the spreading of odor in a room or the mixing of gases in the atmosphere.

1 liter is equal to 1000 milliliters. This is a standard conversion in the metric system, where the prefix "milli" represents one thousandth, and the prefix "kilo" represents one thousand. Therefore, when converting from liters to milliliters, we multiply the number of liters by 1000 to obtain the equivalent volume in milliliters.

Matter refers to anything that occupies space and has mass, comprising fundamental particles such as atoms and molecules. It encompasses everything from solid objects to gases and liquids. Matter is fundamental to the physical universe, forming the basis of all materials and substances we encounter. Understanding matter involves studying its properties, states (solid, liquid, gas), and interactions at microscopic and macroscopic levels, crucial for fields like physics, chemistry, and biology.

Solids have a fixed shape and volume, which means that they are difficult to change their shape. However, they can break under force, indicating that they are not completely rigid. Therefore, solids fit the description given in the statement and are the correct answer.

Liquids flow and change shape, making them not rigid like solids. This property allows liquids to be called fluids.

On a hot dry day, the air has low humidity, which means it contains less moisture. This low humidity allows for better evaporation because the air has a higher capacity to absorb moisture. When water evaporates, it absorbs heat from its surroundings, resulting in a cooling effect. Therefore, the high temperature combined with low humidity enables better evaporation, leading to better cooling in a cooler.

Matter is classified into five types: solids, liquids, gases, plasmas, and Bose-Einstein condensates. These classifications are based on the physical properties and behavior of different substances. Solids have a fixed shape and volume, liquids have a fixed volume but take the shape of their container, gases have neither a fixed shape nor volume, plasmas are ionized gases with free-moving charged particles, and Bose-Einstein condensates occur at extremely low temperatures where particles behave as a single entity.

A saucer has a larger surface area than a cup, which allows for more exposure to the surrounding air. This increased surface area promotes quicker evaporation of the hot tea or milk in the saucer, causing it to cool down faster compared to a cup with a smaller surface area.

Solids have a tendency to maintain their shape when subjected to an outside force because the particles in solids are closely packed together and have strong intermolecular forces. These forces hold the particles in a fixed position, allowing solids to resist deformation and maintain their shape. In contrast, liquids and gases do not have a fixed shape and can easily change their shape when subjected to an outside force. Therefore, solids are the only option that fits the given statement.

The SI unit of mass is the kilogram (kg).

Explanation:

SI Unit: The International System of Units (SI) is the modern form of the metric system and the world's most widely used system of measurement.

Kilogram (kg): The kilogram is the base unit of mass in the SI system and is defined by a physical constant.

The compressibility of solids is very low because solids have a rigid and closely packed arrangement of particles. The intermolecular forces between these particles are strong, preventing them from being easily compressed or squeezed together. The rigid structure of solids allows them to maintain their shape and volume even under high pressure.

The explanation for the given answer is that at higher temperatures, the particles of the food have more kinetic energy. This means that they are moving faster and colliding with each other more frequently. As a result, more volatile compounds are released from the food, creating a stronger smell that can travel further. In contrast, at lower temperatures, the particles have less kinetic energy and move slower, resulting in fewer collisions and less release of volatile compounds. Therefore, the smell of hot sizzling food can reach you from a greater distance compared to the smell of cold food.

This observation shows that the driver is able to cut through water in a swimming pool due to the weak force of attraction between water molecules. This weak force of attraction allows the driver to move through the spaces between the molecules, causing the water to part and allowing the driver to pass through.

The SI unit of volume is cubic meters (m³). Volume is a measure of the amount of space occupied by an object or substance, and it is expressed in cubic units. The cubic meter is the standard unit of volume in the International System of Units (SI), which is used in scientific and everyday measurements around the world. It represents the volume of a cube with sides of one meter in length.

Aquatic animals and plants require oxygen for respiration, which is essential for their survival. Oxygen is needed for the breakdown of food molecules to release energy. Carbon dioxide is also necessary for aquatic plants as they use it during photosynthesis to produce glucose and oxygen. Therefore, the correct answer is oxygen and carbon dioxide.

The correct answer explains that an earthen pot is porous in nature, meaning it has tiny pores. These pores allow water to penetrate into the pot and then evaporate from the surface. This evaporation process leads to the cooling effect of the water kept in the pot during summer.

The correct answer is 1 cm3. This is because 1 milliliter (ml) is equal to 1 cubic centimeter (cm3).

The rate of diffusion of liquids is higher than that of solids because particles in liquids move freely and have greater space between each other compared to particles in the solid state. This allows the particles in liquids to move more easily and spread out, leading to a faster rate of diffusion.

The question is asking for the conversion of liters to cubic decimeters. Since 1 liter is equal to 1 cubic decimeter, the correct answer is 1.

Liquids can diffuse into solids, liquids, gases, and plasma. Diffusion is the process by which particles move from an area of higher concentration to an area of lower concentration. In the case of liquids, the molecules are able to move and spread out, allowing them to mix with other substances. This can happen when a liquid is poured onto a solid, when two liquids are mixed together, or when a liquid is exposed to a gas or plasma. Therefore, liquids have the ability to diffuse into other states of matter.