Table of Contents
When cut, these materials maychange their size and shape, but no new material is formed. Hence only the physical appearance of the solid material ischanged when cut.
What happen to the materials when they are cut?
When solid materials are pressed, they undergo physical change. No new substance is formed but, it changes its form, texture size or shape 2.No, there is no new material formed when a solid material is bent, pressed hammered and cut, it only changes the shape and the size of the material.
What happened to the piece of wood when cut?
When we burn wood it turns into Ashes which is a new substance and process is Irreversible one hence, is a chemical change. While cutting the wood into small pieces, no new substance is formed, hence it is a physical change.
What happened when the materials were placed near the magnet?
Answer. Answer: 1) When two magnets are brought near each other, like poles repel; opposite poles attract. 2) When a magnet is brought near a piece of iron, the iron also gets attracted to the magnet, and it acquires the same ability to attract other pieces of iron.
What happens to the solid material when bent?
Answer Expert Verified Like a plastic ruler, when bent, it only changes its form,not its chemical composition, solid does not change its chemical composition when bent, hammered or pressed, therefore plastic ruler when bent, or when being applied an extent force, only undergoes physical change.
What type of change is cutting of wood Class 9?
A lot of energy in the form of light is given out. This is a combustion reaction and the components of the wood are oxidized. -Whereas in cutting of wood no new substance is formed and the original properties of the substance, here wood, are intact. So, this is a physical change.
Why firewood burn faster when they are cut into small pieces?
The more oxygen molecules that collide per second with the fuel, the faster the combustion reaction is. You can increase the surface area of a solid by breaking it up into smaller pieces. If you chop or break up wood into small pieces, it will ignite and burn more quickly than larger pieces of wood.
Why cutting wood and burning it are two different change explain?
Burning of wood is a chemical change while cutting of wood is a physical change because during burning, new substances are formed. After burning, we cannot get original substance, (i.e. wood) back. Cutting of wood into small pieces is a physical change because no new substance is formed.
Where is the strongest part of a magnet?
The magnetic field generated by any magnet is always strongest at either pole. The magnetic force is equally as strong at both the north and south pole.
What are the two ends of a magnet called?
The end that faces the north is called the north-seeking pole, or north pole, of the magnet. The other end is called the south pole. When two magnets are brought together, the opposite poles will attract one another, but the like poles will repel one another.
Where is the magnetic field the strongest?
But we know the field inhabits all the space around the magnet. It is strongest at the poles. So, what are magnetic poles? Magnetic poles are opposite ends of a magnet where the magnetic field is strongest.
What happens to solid when bent and pressed?
Solid materials can be bent. When bent, these materials may change their size and shape. No new material is formed. Only the physical appearance of the materials is changed.
Is solid materials can be bent?
Explanation: Solid materials can be bent. When materials are bent, new material is formed. Only the physical appearance of a material is changed when it is cut.
What are the materials can be bent?
Some metals are soft and easily bent, such as aluminum (Al). A metal that is easily bent is called malleable. Weight: Many common metals such as iron, copper, and zinc are very heavy (dense), although the smaller metals such as aluminum and lithium are fairly light.
What do we get when two or more elements are combined?
Elements can be chemically combined into compounds, therefore, a compound consists of two or more elements combined, in definite proportions, by chemical means. Compounds may be formed by combining atoms of their constituent elements by ionic bonds or by covalent bonds.
Is cutting fruit a physical change?
Blending a smoothie, for example, involves two physical changes: the change in shape of each fruit and the mixing together of many different pieces of fruit. Cutting, tearing, shattering, grinding, and mixing are further types of physical changes because they change the form but not the composition of a material.
What type change is cutting of wood?
The burning of wood leads to the formation of new substances like ash(carbon), carbon dioxide gas, water vapour, heat and light. This change is irreversible and hence a chemical change. While cutting wood into smaller pieces is a physical change as there is no change in the original composition of wood.
Which will catch fire easily?
Flammable and combustible liquids Besides gasoline and lighter fluid, things like rubbing alcohol, nail polish remover, hand sanitizer and wart remover can easily catch fire.
What are the 4 behaviors of fire?
Fire behavior includes such things as how fast a fire burns (rate of spread), how hot it burns (fire intensity), the presence of fire whirls, and ember production and spotting.
Can wind put out fire?
Wind has a strong effect on fire behavior due to the fanning effect on the fire. Wind increases the supply of oxygen, which results in the fire burning more rapidly. It also removes the surface fuel moisture, which increases the drying of the fuel. Air pressure will push flames, sparks and firebrands into new fuel.
What is the difference between burning of magnesium ribbon and burning of candle?
Answer: a candle burns with a yellow flame while a magnesium ribbon burns with a dazzling white flame. A candle burns with a yellow flame where as magnesium ribbon reacts with the oxygen and burns with the dazzling white flame to form powdery white substance called magnesium oxide.
What is the difference between glowing of an electric bulb and burning of wood?
Answer: Burning of wood produces C02 while glowing of an electric bulb give a little heat energy and light energy.
What type of change is cutting of food?
It is so because while cutting we just cut vegetables into pieces and though it’s physical shape and size change its chemical composition remains the same but while cooking of food we add masalas,water and many other things which change both the physical state and chemical composition so it is a chemical change and Nov 1, 2018.
Are 2 magnets stronger than 1?
Yes, stacking multiple magnets together can make them stronger. Two or more magnets stacked together will exhibit nearly the same strength as a single magnet of the combined size.
What part of the magnet is the weakest?
The magnetic field is weakest at the center and strongest between the two poles just outside the bar magnet. The magnetic field lines are densest at the center and least dense between the two poles just outside the bar magnet.
Why is a magnet strongest at its pole?
For a magnet, the flux lines repel each other so the field will be weaker at the sides. But they are concentrated at the poles, where they originate, so the field is stronger.
What happen to the materials when they are cut?
When solid materials are pressed, they undergo physical change. No new substance is formed but, it changes its form, texture size or shape 2.No, there is no new material formed when a solid material is bent, pressed hammered and cut, it only changes the shape and the size of the material.
What happened to the piece of wood when cut?
When we burn wood it turns into Ashes which is a new substance and process is Irreversible one hence, is a chemical change. While cutting the wood into small pieces, no new substance is formed, hence it is a physical change.
What happened when the materials were placed near the magnet?
Answer. Answer: 1) When two magnets are brought near each other, like poles repel; opposite poles attract. 2) When a magnet is brought near a piece of iron, the iron also gets attracted to the magnet, and it acquires the same ability to attract other pieces of iron.
What happens to the solid material when bent?
Answer Expert Verified Like a plastic ruler, when bent, it only changes its form,not its chemical composition, solid does not change its chemical composition when bent, hammered or pressed, therefore plastic ruler when bent, or when being applied an extent force, only undergoes physical change.
What type of change is cutting of wood Class 9?
A lot of energy in the form of light is given out. This is a combustion reaction and the components of the wood are oxidized. -Whereas in cutting of wood no new substance is formed and the original properties of the substance, here wood, are intact. So, this is a physical change.
Why firewood burn faster when they are cut into small pieces?
The more oxygen molecules that collide per second with the fuel, the faster the combustion reaction is. You can increase the surface area of a solid by breaking it up into smaller pieces. If you chop or break up wood into small pieces, it will ignite and burn more quickly than larger pieces of wood.
Why cutting wood and burning it are two different change explain?
Burning of wood is a chemical change while cutting of wood is a physical change because during burning, new substances are formed. After burning, we cannot get original substance, (i.e. wood) back. Cutting of wood into small pieces is a physical change because no new substance is formed.
Where is the strongest part of a magnet?
The magnetic field generated by any magnet is always strongest at either pole. The magnetic force is equally as strong at both the north and south pole.
What are the two ends of a magnet called?
The end that faces the north is called the north-seeking pole, or north pole, of the magnet. The other end is called the south pole. When two magnets are brought together, the opposite poles will attract one another, but the like poles will repel one another.
Where is the magnetic field the strongest?
But we know the field inhabits all the space around the magnet. It is strongest at the poles. So, what are magnetic poles? Magnetic poles are opposite ends of a magnet where the magnetic field is strongest.
What happens to solid when bent and pressed?
Solid materials can be bent. When bent, these materials may change their size and shape. No new material is formed. Only the physical appearance of the materials is changed.
Is solid materials can be bent?
Explanation: Solid materials can be bent. When materials are bent, new material is formed. Only the physical appearance of a material is changed when it is cut.
What are the materials can be bent?
Some metals are soft and easily bent, such as aluminum (Al). A metal that is easily bent is called malleable. Weight: Many common metals such as iron, copper, and zinc are very heavy (dense), although the smaller metals such as aluminum and lithium are fairly light.
What do we get when two or more elements are combined?
Elements can be chemically combined into compounds, therefore, a compound consists of two or more elements combined, in definite proportions, by chemical means. Compounds may be formed by combining atoms of their constituent elements by ionic bonds or by covalent bonds.
Is cutting fruit a physical change?
Blending a smoothie, for example, involves two physical changes: the change in shape of each fruit and the mixing together of many different pieces of fruit. Cutting, tearing, shattering, grinding, and mixing are further types of physical changes because they change the form but not the composition of a material.
What type change is cutting of wood?
The burning of wood leads to the formation of new substances like ash(carbon), carbon dioxide gas, water vapour, heat and light. This change is irreversible and hence a chemical change. While cutting wood into smaller pieces is a physical change as there is no change in the original composition of wood.
Which will catch fire easily?
Flammable and combustible liquids Besides gasoline and lighter fluid, things like rubbing alcohol, nail polish remover, hand sanitizer and wart remover can easily catch fire.
What are the 4 behaviors of fire?
Fire behavior includes such things as how fast a fire burns (rate of spread), how hot it burns (fire intensity), the presence of fire whirls, and ember production and spotting.
Can wind put out fire?
Wind has a strong effect on fire behavior due to the fanning effect on the fire. Wind increases the supply of oxygen, which results in the fire burning more rapidly. It also removes the surface fuel moisture, which increases the drying of the fuel. Air pressure will push flames, sparks and firebrands into new fuel.
What is the difference between burning of magnesium ribbon and burning of candle?
Answer: a candle burns with a yellow flame while a magnesium ribbon burns with a dazzling white flame. A candle burns with a yellow flame where as magnesium ribbon reacts with the oxygen and burns with the dazzling white flame to form powdery white substance called magnesium oxide.
What is the difference between glowing of an electric bulb and burning of wood?
Answer: Burning of wood produces C02 while glowing of an electric bulb give a little heat energy and light energy.
What type of change is cutting of food?
It is so because while cutting we just cut vegetables into pieces and though it’s physical shape and size change its chemical composition remains the same but while cooking of food we add masalas,water and many other things which change both the physical state and chemical composition so it is a chemical change and Nov 1, 2018.
