0
What else can I help you with?
Explain Why blackboards are not scratched by chalk but by the sand embedded in the chalk?
Blackboards are typically made of a material that is softer than chalk, such as slate or porcelain. When you write on a blackboard with chalk, the friction between the chalk and the board causes the chalk to wear down and leave behind tiny particles of sand or abrasive material embedded in the chalk. These abrasive particles then scratch the surface of the blackboard as you write, creating marks that can be difficult to erase.
Why is the chalk float inside the water?
The chalk float inside the water because chalk has a lower density than water, causing it to float. This is due to the principle of buoyancy, where an object will float if it is less dense than the fluid it is placed in.
What is a rock that is white and harder than chalk called?
A rock that is white and harder than chalk is likely to be marble. Marble is a metamorphic rock that is formed from limestone under high pressure and heat, making it harder and more durable than chalk, which is a soft sedimentary rock.
What is more than one inch?
a piece of chalk
What has the larger surface area a lump of chalk or chalk powder?
Chalk powder has a larger surface area compared to a lump of chalk. This is because the process of grinding chalk into powder increases the total surface area exposed to the surrounding environment. As a result, the smaller particles of chalk powder provide more surface area for reactions, interactions, or absorption than a single lump of chalk.
Does white chalk last longer than blue chalk?
your an idiot, no a whitle chalk is not longer than aq blue chalk
Does white chalk last longer than coloured chalk?
i think white chalk does last longer than coloured chalk because of chemicals. Not everything is coloured or just white but teachers tend to often use white chalk. They use it and use it but does it finish in one day no coloured chalk not much people use but it will change colour very quickly because it doesnt get used as much as white does.so shut up
Is chalk harder than rubber?
Chalk is harder than rubber. Chalk is a form of limestone made of calcium carbonate, which is a relatively hard mineral, whereas rubber is a soft and flexible material typically made from natural or synthetic polymers.
Why can diamonds scratch chalk?
Diamonds are harder than chalk.
Do Trucks take longer to stop than passenger cars?
Trucks take longer to stop than passenger cars.
Is chalk denser than water?
yes chalk is denser then water.
Is chalk harder than limestone?
No, limestone is harder than chalk. Limestone is a sedimentary rock composed mainly of calcite, whereas chalk is a soft, porous sedimentary rock composed mainly of calcium carbonate.
What is Crayola sidewalk chalk?
Its regular chalk made by the Crayola corporation. The chalk is also larger in diameter than chalk for a blackboard to make it sturdier.
Can you take cephalexin for longer than prescribed?
No.
What would erode quicker soil or concreate?
definitely soil. Concrete is much, much, much more solid than soil, so concrete lasts a lot longer than soil. Soil erodes very quickly because it is not very solid. Anything from a raindrop to a gust of wind can erode soil. Concrete, not so much.
Is chalk stronger than clay?
chalk is weaker than clay because of the particles which are migrated inside it. Chalk can float while clay will sink. Clay can also absorb muhc more water No, Clay is stronger than chalk. OF COURSE CHALK IS STRONGER THAN CLAY, HONEY!!! IT IS HARDER AND ABSORBS LESS WATER. Sweetie, why du think clay sinks?
Why it is difficult to broke a small chalk than a large chalk?
Leverage. With a long piece of chalk you have more to grasp, enabling you to bend it until it snaps.
