Pre-Technical & Pre-Career Questions and Answers - Grade 7 Opener Exams Term 2 2023 Set 3

QUESTIONS

1. You are required to do the following tasks:
   1. Clean the compound.
   2. Clear grass around your house.
   3. Cook lunch for the visitors.
      1. Which tools and equipment will you require to perform each of the tasks? (3 mks)
         1. Clean the compound
         2. Clear grass around your house
         3. Cook lunch for the visitors
      2. What safety hazards are you likely to face as you perform each of the tasks? (2 mks)
      3. Suggest two safety measures that you will observe to avoid injuries. (2 mks)
2. Alphy admires the work that safety engineers do. He would like to pursue a similar carcer or another carcer related to safety after school. Suggest to him two other careers that he can pursue. (2 mks)
3.                
   1. Read the following statements about first aid: Indicate True or False.. (3 mks)
      First aid is only given by doctors.
      First aid is given to save life or further injuries.
      We should pop the blister if they form on a scalded area.
   2. Abraham, a grade 7 student, assembled the following items: clean water, a bandage, cotton wool and an antiseptic to manage a cut that he got when chopping onions. Describe the procedure he would use to administer first aid for the injury. (4 mks)
4. List three careers related to use of metals. (3 mks)
5.                  
   1. Distinguish between ferrous and non-rous metals. (2 mks)
   2. Give two example of: (4 mks)
      1. ferrous metals
      2. non-ferrous metals
6.                
   1. Describe a simple experiment to prove that a copper wire conducts electricity, but a picce of coal does not. (4 mks)
   2. Give a reason why aluminium is used to make cooking pans. (1 mk)
7. Teresia placed a mixture of sand and sulphur on a piece of paper and passed a magnet over it.
   1. Describe what happened. (2 mks)
   2. From your description in (a) above items as magnetic and non-magnetic..(2 mks)
8. Grade 7 students visited the construction site for their new laboratory in their school. They ** came across the following materials: Stones, tiles, sand, timber and plastic jerry cans.
   1. Classify the materials as either metals or non-metals (1 mks)
      

      Metals	Non-metals

   2. Name the material used to make the following items. (3 mks)
      
9.            
   1. Categorize the following non-metals as either natural or synthetic. (4 mks)
      

      Plastic
      Reeds
      Hides
      Sisal Fibres

   2. State two uses of non-metallic materials in the locality. (2 mks)
10.            
    1. Name the following household hand tools and state their uses. (6 mks)
       

       Tool:	Tool:	Tool:
       Use:	Use:	Use:

Marking Scheme

1.              
   1.                              
      1.            
         • Dustpan
         • Rake
      2.              
         • Slasher
         • Rake Panga
         • Lawn mower
      3. Gas Cooker/Jiko/ Blender/ Oven
         (Any relevant kitchen tool)
   2.                      
      • Fires and hot surfaces from cooking.
      • Sharp tools can cause cuts.
      • Spills on floors can cause falls.
      • Poorly disposed waste such as fruit peels which can cause falls.
   3.              
      • Clean spills on the floor immediately to avoid falls.
      • Keeping a safe distance when cutting grass.
      • Using kitchen gloves to hold hot kitchen tools.
      • Wear gloves and gumboots while disposing waste.
2.            
   1.                                        
      • Crossing guard
      • Life guard
      • Risk manager
      • Environmental health and safety consultant
   2.              
      • Fires and hot surfaces from cooking
3.                
   1.                     
      • False
      • True
      • False
   2.                
      • Wash his hands
      • Apply gentle pressure around the cut with a clean piece of cloth or cotton wool until bleeding stops.
      • Clean the cut with clean water.
      • Apply some antiseptic.
      • Cover the cut with a bandage to keep away dirt.
4.              
   • Mining
   • Moulding
   • Metal cutting
   • Blacksmithing
   • Welding
   • Metal polishing
   • Fabrication
5.                  
   1. Ferrous metals are metals that contain iron in its original form or alloys of iron while non- ferrous metals are metals that do not contain iron.
   2.                    
      1. ferrous metals
         • Iron
         • Steel
      2. non-ferrous metals
         • Aluminium, Copper, Zinc, Cobalt, tin, lead, Nickel, Silver bronze, brass, mercury 
6.            
   1.                                     
      • Set up an experiment using wires, bulb and dry cells (Simple cell circuit).
      • Put copper wire between point A and B to close the gap.
      • The bulb lights when copper is used to complete the circuit.
      • If a piece of coal is used instead, the bulb does not light.
      • Therefore, copper is a good conductor of electricity while coal is not.
   2.                      
      • Aluminium does not corrode easily
      • Aluminium does not react with water.
7.                
   1. None of the substances were attracted by the magnet
   2. Both sand and sulphur are non-magnetic
8.              
   1. Non-metals
   2.                
      • Glass
      • Rubber
      • Paper/leather/textile
9.                      
   1.                
      • Plastic - Synthetic
      • Reeds - Synthetic
      • Hides - Synthetic
      • Sisal fibres - natural
   2.              
      • Fibres like cotton and linen are used to make cloths
      • Rubber is used to make items such as tyres, erasers and footwear.
      • Timber or wood is used to make furniture
      • Sand soil is used to make concrete. Loam soil for farming. Clay soil in pottery.
      • Grasses are used to make mats, baskets and brooms.
      • Hides and skin are used to make shoes, belts and bags
      • Glass is used to make window panes, furniture and utensils.
      • Plastic is used to make items such as utensils, furniture. buckets
      • Minerals are used to manufacture various items.
10.                            
    1.            
       • Hammer
         Use: general carpentry, framing. nail pulling
       • Pliers
         Use: holding and gripping small articles or bendin and cutting wire
       • Hoe/Jembe
         Use: Till the soil, eradicate weeds.