2 more science qs.?

Question

what causes a material to change from one state of matter to another?


And what is one example of

A metal

A non-metal

and a metalloid??


Please help i need to study for the test tomarrow!!

Answer 1

1. Change in the kinetic energy of its particles (a change in temperature) ie: ice is melted into water, water is frozen into ice

2. Copper

3. Helium

4. A group of elements that has the properties of both metals and non-metals - such as silicon

Answer 2

Chemical changes.

A metal can rust.
A non metal could burn such as wood.

Would this help for metalloids:
alkaline-earth metals, metals constituting Group 2 of the periodic table. Generally, they are softer than most other metals, react readily with water (especially when heated), and are powerful reducing agents, but they are exceeded in each of these properties by the corresponding alkali metal. They form divalent compounds. In order of increasing atomic number the alkaline-earth metals are beryllium, magnesium, calcium, strontium, barium, and radium.

Answer 3

what ought to it propose at the same time as there are molten rock popping out of the floor? "new" stuff from the mantle (below the floor) are being dumped off on the sea floor. to me, it skill the subsurface strategies are alive and activel; the sea floor is turning out to be with information from the buildup of this "new" textile (obviously it would want to also be "demise" at its opposite end) at the same time as new lava is produced and cooled, it files earth's organic magnetic field....which occurs to educate in polarity (north <--> south) each and every XXX unit of time. in case you would possibly want to be certain strips on strips on the sea floor, what does it inform you?