If I am not mistaken, the gravity of an object is determined by its mass, and that is what makes it heavy. Size does not always make an object heavier. For example, the planet Jupiter is much larger than earth, but it is less dense and contains no solid matter. Therefore it weighs less and has less gravity.
Heavy rocks are heavy because they have more mass than lighter rocks. And because they have more mass, gravity from the earth pulls down on them more than on lighter rocks.
because it is hard and there is something in side?
It is on earth so it has gravity so it has a lot of mass.
Rocks are not big, I walk on them, throw them and even skip them across the creek every day.
If they were big I wouldn't be able to do that.
No pumice for instance is very light.
Iron's high density makes it heavy.
They don't. Galileo Galilee proved this.
No. These are not heavy metals. They are salts of non heavy metals.
It can have small amounts of heavy metals, depends where it comes from. - If you are concerned take a sample for lab analysis.It can have heavy metals, depends where it comes from. If you are concerned take a sample for lab analysis.
Scientifically speaking, there are a couple of fundamental differences between heavy metals and other metals in the table of the elements. Heavier metals tend to have more ions and typically, less toxic elements.
Most heavy metals, but not all, are not even required by human body and they cause problems even in a very small concentration. They often take same pathways as essential nutrients and so cause toxic effects. They also bioaccumulate and biomagnify
No. Heavy metals include things like Lead (Pb)
heavy metals
No. These are not heavy metals. They are salts of non heavy metals.
Heavy metals are typically found in the middle of the periodic table. These heavy metals are often also transition metals.
Well electromagnets have great power so it is understandable that someone would use it to pick up heavy metals.
The disadvantage is that you can't destroy heavy metals (or any metals or, indeed, any chemical elements) by incineration. So the most you can achieve by incineration is scattering heavy metals around with ash that is carried away with smoke.
Heavy metals compounds have frequently toxic properties.
It can have small amounts of heavy metals, depends where it comes from. - If you are concerned take a sample for lab analysis.It can have heavy metals, depends where it comes from. If you are concerned take a sample for lab analysis.
they are considered heavy metals because of the weight to volume ration in comparison to other metals. they have more mass with little volume than other metals do.
Easy answer you could have come up with by yourself I think. Crude oil, means oil straight from the ground and not refined yet. Heavy metals means not light metals. So not iron or sodium but Lead and other heavy stuff. Since oil comes from the ground and metals are mined from the ground, it makes sense that they could be found together. So if the teacher wants a different answer he should have said "how is crude oil formed" or something like that.
The metals having density more than 5 are usually known as heavy metals. Density of some heavy metals is as below: Zinc (Zn) 7.13 Iron (Fe) 7.87 Copper (Cu) 8.96 Silver (Ag) 10.49 Lead (Pb) 11.36 Mercury (Hg) 13.55 We use fertilizers which contain elements having density more 5 or more than 5 like zinc sulphate or copper sulphate ets. so we can say that plants take these heavy metals in shape of fertilizers.
Scientifically speaking, there are a couple of fundamental differences between heavy metals and other metals in the table of the elements. Heavier metals tend to have more ions and typically, less toxic elements.
Ajay Kumar Saxena has written: 'Heavy metals in the environment : curse or boon' -- subject(s): Environmental aspects, Environmental aspects of Heavy metals, Heavy metals, Pollution, Water