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Vacation Homework

This document contains summaries of 10 science topics: 1) Ionic compounds are formed by the transfer of electrons between metals and non-metals, forming ionic bonds. 2) Sweating cools the body as heat causes particles of sweat to evaporate, removing heat from the body. 3) Magnesium sulfate is obtained by dissolving, purifying, and crystallizing magnesium sulfate from water.

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omaranwer215
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49 views9 pages

Vacation Homework

This document contains summaries of 10 science topics: 1) Ionic compounds are formed by the transfer of electrons between metals and non-metals, forming ionic bonds. 2) Sweating cools the body as heat causes particles of sweat to evaporate, removing heat from the body. 3) Magnesium sulfate is obtained by dissolving, purifying, and crystallizing magnesium sulfate from water.

Uploaded by

omaranwer215
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Vacation Homework

Y8 - Science
1

It requires of one electron to complete shell.


ionic compounds can be defined as the compounds formed by the transfer of electrons between metals and
non-metals. The bond formed between them is known as the ionic bond

as your access body heat is used to convert the particles of sweat into vapors to start to cool down. Since,
heat increase the particle collision within the particles and this increases the amount of energy into the
particles and make it evaporate.

magnesium sulfate occurs naturally as MgSO4. This is dissolved in water and purified sulfate is
obtained by crystallization from the solution. These crystals are sieved.
4

Plants growth absorbs minerals salts including nitrate ions needed for healthy growth. For healthy growth
plants need minerals ions including nitrate for producing protein. magnesium IONS ARW needed for
chlorophyll production.
5

Total mass of reactants and mass of the products remain same through out the experiment. This is
called law of conservation of mass.

the chemical bond present in water molecules is covalent bond because one oxygen atom shares its 2
electrons with 2 hydrogen atoms.

the asteroids hits the earth.

the volcanic eruptions due to asteroid hitting caused climatic change on earth
7

the reactivity of rubidium is increasing.


8

In evaporation the liquid form changes into gas form and in boiling the liquids get heated up to vaporized
due to continuous heating of the liquid.

boiling unnatural and evaporation unnartual

black absorb heat from sun converts heat energy tocoper which is good conductor of heat that
9

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polystyrene cps helps to insulate the reaction mixture from temperature or heat changes. therefore, when using
specific heat more of the heat will escape to the surroundings when glass is used. whereas a negligible amount
could escape when using polystyrene.

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