1. (a) The two types of reflection are regular reflection and diffuse reflection.
(b) The two laws of reflection of light are:
- The angle of incidence is equal to the angle of reflection.
- The incident ray, the reflected ray, and the normal to the surface at the point of incidence all lie in the same plane.
2. (a) Three causes of HIV / AIDS are unprotected sexual intercourse, sharing contaminated needles, and transmission from mother to child during childbirth or breastfeeding.
(b) Three ways by which HIV / AIDS can be prevented are practicing safe sex, not sharing needles, and getting tested regularly.
3.
(a) Evaporation is the process in which a liquid turns into gas at a temperature below its boiling point.
(b) Melting is the process in which a solid turns into a liquid when heat is applied to it.
4.
(a) Two importance of separating mixtures are obtaining pure substances for further use and removing impurities.
(b) The three formations of mixtures are homogeneous mixtures, heterogeneous mixtures, and colloidal mixtures.
5.
(a) Four methods of separating mixtures are filtration, distillation, chromatography, and evaporation.
(b) A magnet is an object that produces a magnetic field and attracts materials containing iron, nickel, or cobalt.
Answer the following questions
1. (a) Name the two types of reflection.
(b) State the two laws of reflection of light.
2. (a) State three causes of HIV / AIDS
(b) State three ways by which HIV / AIDS can be prevented
3. Explain the followingterms
(a) Evaporation
(b) Melting
4. (a) Write down two importance of separating mixtures.
(b) White down the three formations of mixtures?
5. (a) Mention any four methods of separating mixtures.
(b) What is a magnet?
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