1. What is technology?

The application of scientific knowledge to make tools and solve problems in everyday life A kind of farming The study of ancient history Only the use of computers

2. Which is one use of technology in communication?

Microscopes make small things look bigger Refrigerators keep food cold Tractors plough the land Mobile phones let people send messages and talk over long distances

3. Balance the chemical equation: Fe + O2 yields Fe2O3. Which is the balanced equation?

4Fe + 2O2 yields 2Fe2O3 Fe + O2 yields Fe2O3 2Fe + 3O2 yields 2Fe2O3 4Fe + 3O2 yields 2Fe2O3

4. Balance the chemical equation: Na + Cl2 yields NaCl. Which is the balanced equation?

2Na + Cl2 yields 2NaCl Na + 2Cl2 yields 2NaCl 2Na + 2Cl2 yields 2NaCl Na + Cl2 yields NaCl

5. Balance the chemical equation: H2 + O2 yields H2O. Which is the balanced equation?

2H2 + O2 yields 2H2O H2 + O2 yields 2H2O H2 + O2 yields H2O 2H2 + 2O2 yields 2H2O

6. Which statement correctly gives one function each for the nucleus and the chloroplast and the mitochondrion of a cell?

The nucleus carries out photosynthesis and the chloroplast controls the cell and the mitochondrion releases energy The nucleus controls the cell and the chloroplast carries out photosynthesis and the mitochondrion releases energy by respiration The nucleus releases energy and the chloroplast controls the cell and the mitochondrion carries out photosynthesis The nucleus stores water and the chloroplast controls the cell and the mitochondrion carries out photosynthesis

7. Which list gives four cultural practices in vegetable crop production?

Nursery management then transplanting then weeding then watering Weaving then spinning then dyeing then sewing Milling then grinding then packaging then freezing Smelting then welding then moulding then casting

8. Which two are agencies in food safety and quality assurance in Ghana?

The Ghana Revenue Authority and the Electoral Commission The Ghana Airports Company and the National Lotteries Authority The Food and Drugs Authority and the Ghana Standards Authority The Ghana Cocoa Board and the Volta River Authority

9. What are stars?

Clouds of dust in space Natural satellites of planets Rocky bodies that reflect sunlight Giant glowing balls of hot gases that give off their own light and heat

10. Which list arranges the first four planets in the solar system starting from the Sun?

Earth then Mars then Mercury then Venus Mercury then Venus then Earth then Mars Venus then Mercury then Earth then Mars Mercury then Venus then Mars then Earth

11. Which statement gives two differences between plants and animals?

Plants and animals differ only in colour Animals make their own food while plants eat other organisms Plants move freely while animals stay fixed in one place Plants make their own food while animals depend on other organisms and plants stay fixed while most animals move

12. Which statement gives two similarities between plants and animals?

Both have chlorophyll in their cells Both grow and reproduce Both have cell walls made of cellulose Both make food using sunlight

13. What is pastoral farming?

Growing only vegetables on small plots Farming that uses only chemical fertilizers Rearing animals such as cattle and sheep and goats on grassland Growing crops in water tanks

14. What is ecological farming?

Farming that clears whole forests Farming only on rooftops Farming that works with nature using methods that protect the environment Farming that uses large amounts of chemicals

15. Which statement correctly describes the properties of water in terms of odour and taste and effect on litmus?

Water has no smell and no taste and does not change the colour of litmus paper Water has no smell but turns blue litmus red Water has a bitter taste and turns red litmus blue Water has a sweet smell and a salty taste and turns litmus red

16. What are annual plants and what are perennial plants?

Annual plants live for many years and perennial plants complete their cycle in one year Annual plants complete their life cycle in one year and perennial plants live for many years Annual plants never produce seeds Both live for exactly two years

17. Which choice correctly gives a danger for each activity: eating or drinking in the laboratory and washing hands with an unknown liquid and walking bare-footed?

You may get tired and the liquid will make your hands dirty and you may feel cold You may swallow harmful chemicals and the liquid may burn the skin and broken glass or spilt chemicals may hurt your feet You will make noise and the beaker will break and you will walk faster You will become hungry and the liquid will evaporate and your shoes will be clean

18. What is a digestive enzyme?

A vitamin that builds bones A mineral that makes blood red A fibre that cannot be digested A protein that speeds up the breakdown of food into simple soluble substances

19. Which pair gives two examples of digestive enzymes in humans?

Glucose and starch Insulin and haemoglobin Amylase and pepsin Chlorophyll and keratin

20. Which statement gives a difference between conduction and radiation of heat?

Radiation needs a material medium while conduction travels through a vacuum Both need particles to touch each other Conduction needs a material medium while radiation can travel through a vacuum Conduction happens only in liquids while radiation happens only in solids