*🔥2020/21 WASSCE INTEGRATED SCIENCE QUESTIONS AND ANSWERS READY BY COOLBOY🔥*

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*INTERSCIENCE THEORY*

1ai ) physical 

Chemical 

Biological

aii) Temperature changes can also contribute to mechanicalweathering in a process called thermal stress. Changes intemperature cause rock to expand (with heat) and contract (with cold). As this happens over and over again, the structure of the rock weakens

1b) loading👇🏾👇🏾

1c) 

NACL, Li2CO3, (NH4)3PO4

cii) -Electrovalent compounds are generally soluble in water and insoluble in solvents such as kerosene, petrol, etc.

-Solubility.

-They have high melting and boiling points. ...

-Melting. ...

-These are solids and are somewhat hard because of the strong force of attraction between the positive and  negative ions. ..

*(choose any2)*