Chemistry

Grade 8 Islamic in English Revision sheet 2021. Any substance which, when taken produces an effect on the mind or body is a drug. T   Alcohol is a poison which is absorbed rapidly and carrie4 in the blood stream to the brain.  T   Drinking is responsible for crimes and may traffic deaths and injuries.  T   Drinking was an not accepted social habit. F   Islam forbids alcohol in any form.  T   Use of alcohol and its abuse, both are forbidden by Islam.  T   It i s the moderate drinker who degenerates into the alcoholic.  T   The teaching of Islam is dear about drinking.  T   Be alert regarding your choice of friends and places of amusement.  T   Children usually start smoking as a result of pressure from their friends.  T   Water is an evil in itself. F   These cause serious effects from long term cigarette smoking.  T

  Grade 5 Science  (A Closer Look Macmillan McGraw-Hill) workbook page 181 Answers. Workbook page 181 1.        Rill 2.        Tide 3.        Phase 4.        Lunar eclipse 5.        Maria 6.        Solar eclipse

Social Studies Unit 4  Lesson 2: Weather and Climate page 85 Exercise 1:  What is the difference between climate and weather? Explain. The weather changes within a short time (24 hours or less), and it changes from day to day. While the climate is constant over a long period (it does not change from one day to another), and it characterizes the general atmosphere of a place over a long period. Exercise 2:  Name the four elements that affect the change of climate from one place to another or from one season to the other. 1. Temperature (heat) 2. Atmospheric pressure 3. Precipitation 4. Wind Exercise 3:  Write “true” or “false”. 1. Wind moves all the time above the surface of the Earth. T 2. A barometer measures temperature. F 3. Temperature refers to heat and the sun might be a possible source of heat. T 4. When I say it’s going to be cloudy today, the I am referring to the weather. T

  Grade 5 Science  (A Closer Look Macmillan McGraw-Hill) workbook page 177 Answers. Workbook page 177 1.        C 2.        F 3.        D 4.        E 5.        B 6.        A

Revision work for chemistry Grade-7  2021.  Chose the best. 1.     A hydrocarbon is a compound containing only hydrogen      and ----------------------. A.    Sodium B.    Carbon C.    Chlorine D.     All 2.        Fossil fuels are called -------------------------- fuels. A.       Renewable B.       Non-renewable C.       Both D.       None of them 3.     In an oil refinery the --------------------- oil is separated into its fractions.           A.        Olive           B.        Seed           C.       Crude           D.        None of them 4.     Unsaturated compounds turn -----------------------------     bromine water     colourless.          A.           Red          B.           Blue          C.           Black          D.           Yellow 5.     The ------------------------------ have at least one double       bond between carbon atoms.   A.      Alkanes B.      Alkenes C.       Alkynes D.   All True and False 1.     Most of our common fuels are fossil fuels . T 2.     Eth

Revision work for chemistry Grade-8  2021.  Chose the best. 1.     In a brewery the Fermentation is carried out          in ------------------- vats. A.    Small B.    Large C.    Medium D.    All 2.     Drugs are substances which affect          the ----------------------- in some way. A.    Plastic B.    Rocks C.    Body D.    None of them 3.     I n the 1950s a new drug called Paracetamol was           introduced. A.    Paracetamol B.    Placebo C.    Emulsion D.    Fermentation 4.     An Emulsion is an example of a ---------------- . A.    Emulsion B.    Fermentation C.    Placebo D.    Colloidal 5.     Detergents are ------------------ agents. A.       Soft B.       Cleaning C.       Bad D.       All True and False 1.     The industries tend to run their processes continuously. T 2.     Aspirin is used for headaches, fevers, and in larger d o ses for arthritis. T 3.     A French chemist called Charles Frederic Gerhardt made a safer drug in 1750 . F 4.     The pigments are sol