Mr_Abdulrahman
Posts : 42
Join date : 2010-01-28
 |  Subject: CH 5 MODEL ANSWERS G7  Tue Feb 09, 2010 7:10 am | |
| 1st : Life Science1. 1- STATE IF THE FOLLOWING SENTENCES ARE TRUE OR FALSE , THEN CORRECT THE WRONG SENTENCES 1 marks1. Worms are classified into 4 main groups. ( F )………………………………………3………………………………………………………………… 2. Sharks have good eye sight. ( F )…………………….poor…………………………………………………………………………….2-COMPLETE THE FOLLOWING SENTENCES2 marks1. Fishes and amphibians are exothermic whose body doesn’t produce much internal heat, also we can call them cold blooded animals.2. The skull protects the brain3-GIVE THE SCIENTIFIC REASONS FOR THE FOLLOWING1 marks1. Cnidarians have nerve cells.Help them respond quickly to danger and to nearby food 4-WHAT WOULD HAPPEN IF1 marks1. The endoskeleton is mal functioned.The organisms like echinoderms will not have a bumpy texture 5- LABEL THE FOLLOWING DRAWINGS1 marksa) What kind of organisms is this vertebrate? birdsb) What are structures 1 and 2? 1. Contour feathers 2. down feathersc) What is the function of structure 1? Give shape to a bird's body and help it fly6- GIVE THE SCIENTIFIC TERM 1 marks1. Kind of sponge cells that can digest food, remove wastes, & form both sperms and eggs. (jelly-like cells in sponges.) 2. A large muscle is located at the bottom of the ribs. ( Diaphragm ) 7-COMPARE BETWEEN THE FOLLOWING (two items are needed for each): 1 marksHerbivores
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Carnivores
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1) Animals that eat only plants
2) Such as gastropods
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1) Animals that eat only other animals
2) Such as cephalopods
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8- ANSWER THE FOLLOWING QUESTIONS1 marks1. What is meant by adaptation ? Structures and behaviors that allow organisms to survive in their environment 2. What material makes up the skeleton of a jawless fish? Cartilage9- CHOOSE THE CORRECT ANSWER 1 marks1. Gastropods have………………a) two external shells b) exoskeleton c)one external shell or no shells.2. All mollusks are characterized by:a)segmented body b) presence of shells. C)soft bodies. D) compound eyes2nd : Chemistry 1. STATE IF THE FOLLOWING SENTENCES ARE TRUE OR FALSE , THEN CORRECT THE WRONG SENTENCES1 marks1. Glass is a crystalline solid .( F )Table salt………………………………………………………………….……………………… 3. Alkaline earth metals are the most reactive metals in the periodictable( F )Alkali………………………………………………………….…………………………..……………… 2. COMPLETE THE FOLLOWING SENTENCES 2 marks1. liquids and gases take the shape of the container.2. oxygen gas and water are two examples of fluids.3. GIVE THE SCIENTIFIC REASONS FOR THE FOLLOWING1 marksDensity is a one way to identify a substance.Because there is no two different substances have the same density (different substances have different densities) 4. WHAT WOULD HAPPEN IF1 marks You discover a new element that is shiny, malleable and ductile. I group it as a metal, give it a name and symbol and put it in a group and period in the periodic table according to its atomic and mass numbers. 5. GIVE THE SCIENTIFIC TERM 2 marks1. The point at which all the solid turns into liquid without Change in temperature. ( melting point )2. A change in which energy is released. ( exothermic ) 6. COMPARE BETWEEN THE FOLLOWING (TWO ITEMS ARE NEEDED FOR EACH) 1 marksAlkali Metals
| Alkaline Earth Metals
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- Group 1 in the periodic table
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- Group 2 in the periodic table
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7. ANSWER THE FOLLOWING QUESTIONS1 marks1. State a physical change and a chemical change that may happen to a piece of sugar.Dissolving sugar in water is a physical change but burning sugar is a chemical change 2. Helium does not react with any other substances .is it accurate to say that helium has no chemical properties? ExplainNo. this is a chemical property of helium that it does not react with other substances 8.CHOOSE THE CORRECT ANSWER1 marks 1. The volume of a cube of wood one of its dimensions is 2 cm equals…….. a)0.06 m b)0.006m c) 0.008 m d) 0.08 m2. Which one of the following describes the nucleus? a) Neutral b) dense c) negative d) takes space
Best wishes,
And good luck
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Beauty Girl
Posts : 95
Join date : 2010-01-27
Age : 26
Location : UR DREAMS
| | Subject: Re: CH 5 MODEL ANSWERS G7 Tue Feb 09, 2010 5:44 pm | |
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