ANSWERS TO THE 'LAST SCIENTIFIC PRAYER'.

      ANSWERS TO THE 'LAST SCIENTIFIC PRAYER'. 

Q1. i. Science is the method of obtaining knowledge through observation and experimentation.

ii. Technology is the practical use of scientific knowledge to produce goods and services.

ii. Living cell is the basic unit of life that is capable of existing in its own. 

iii. Matter is anything that has mass and can occupy space.

Q2. i. Atom --Hydrogen atom, Sodium atom, etc.

ii. Ion ---Hydrogen ion (H+¹), Sodium ion (Na+¹), Oxygen ion (O-²).

Q3. An ion is an electrically charged atom. It is formed when the atom gains or loses an electron.

Q4. Atom is the smallest indivisible particle of matter whilst Element is a group of atoms of the same element that cannot be broken down into simpler forms by any chemical reaction.

Q5. REFER TO YOUR NOTEBOOKS.

Q6. i. Oxygen gas is used for respiration by animals and humans.

ii. Carbon dioxide is used by plants to prepare their own food.

iii. Carbon dioxide is used to extinguish fire.

Q7.i. Gases have no fixed shape.

ii. Gases have no fixed volume.

Q8. Reflection of light is the bouncing back of light whilst Refraction is the change in direction of light travelling from a less dense medium to a denser medium.

Q9. REFER TO YOUR NOTEBOOK.

Q10. i. Ecosystem is the interaction between living things and the nonliving things in a given area.

ii. Adaptation is gradual means by which an organism lives successfully in its habitat.

iii. Habitat is the natural home of an organism. Or it's the natural dwelling place of an organism.

iv. Niche is the position and role of an organism in a community.

v. Predation is the feeding relationship in an organism (predator) hunts and kills another organism (prey).

Q11. Centripetal force is the force that keeps an object towards the center of a circular path whilst Centrifugal force is the force that keeps an object away from the center of a circular path.

Q12. Mass=8.6kg acceleration=5m/s²

i. Force= mass x acceleration

= 8.6 x 5

=43N

ii. Weight= mass x acceleration due to gravity

= 8.6 x 10

=86N

Q13. Mass=4kg

height= 5m

Speed= 6m/s 

g= 10m/s²

i. Potential energy= mass x acceleration due to gravity x height

=mgh

=4x10x5

=200J

iii. Kinetic energy=½mv²

= ½ x 4 x 6²

=1 x 2 x 6 x 6

=72J

iii. Mechanical energy= Potential energy + Kinetic Energy

= 200 + 72

= 272J

Q14. i. A drunkard walking

ii. Dragging a table on a concrete slab 

Q15. Newton's first law of motion states that, a body at rest or in motion will continue to be at rest or move in a straight line unless an external force acts on it. It is also called the INERTIA.

Q16. Magnetism is the property of a object (magnet) to draw magnetic objects onto itself.

Q17. i. The law of conservation of energy states that, energy can neither be created nor destroyed but can be changed from one form to another.

ii. The law of magnetism states that, like poles repel and unlike poles attract.

Q18. Ruminants have four chambered- stomach whilst Monogastrics are single chambered-stomach.

Q19. i. Collection 

ii.Evaporation

iii. Condensation

iiv. Precipitation 

Q20. i.Goitre - Lack of iodine

ii. Rickett - Lack of calcium

iii. Poor hair growth - Lack of nitrogen

Q21. i. Peels of cassava

ii. Left over food

iii. Carcass of dog

Q22. Climate change is the irregularities in the climatic conditions of the earth by activities of man.

Q23. This is because, electric vehicles wouldn't burn fossil fuels to produce excess green house gases that would cause global warming to the earth, but Fossil fueled-cars need to burn fossil fuels before they operate, and by so doing, they produce excess green house gases that contribute to global warming.

THE END, THANK YOU FOR TAKING PART. SOMEDAY WE SHALL MEET AGAIN, UNTIL WE MEET AGAIN IT'S BYE FOR NOW.