help with science for grade five

Question: How do the prefixes and suffixes for the open chain hydrocarbons indicate their formula? Answer: The prefixes meth-, eth-, prop-, but-, pent-, hex-, hept-, oct-, non- deca- indicate that the number of 'C' atoms in the molecule of hydrocarbons is 1, 2, 3, 4, 5, 6, 7, 8..

Question: In an experiment it was found that litharge, red oxide of lead and lead peroxide contained 92.83%, 90.6% and 86.6% of lead respectively. Show that these figures are in agreement with the Law of Multiple Proportions. Answer: In litharge, the amount of lead = 92.83% The amount o..

Question: Give the equation of motion connecting u, v, a and s where the symbols have their usual meaning 1. v = u + at 2. 3. v 2 - u 2 = 2aS 4. Answer: ..

Question: What are vascular plants? Answer: The higher plants are also called the vascular plants as the transport in them is with the help of the vascular syste..

Question: Explain what is the power of accommodation of an eye. Answer: The ability of the eye lens to change its focal length to focus the images of all the objects, distant or nearby on the retina is known as the power of accommodation. The eye lens changes its focal length by changing..

Question: Give two common features of plants. Answer: They are stationary They trap the sun's energy to make food...

Question: The disease that is not caused by fungus is 1. aspergillosis 2. cow pox 3. ringworm 4. actinomycosis Answer: ..

Question: Which of the following is not a mixture? 1. Blood 2. Silver coins 3. Saliva 4. Plutonium Answer: ..

Question: What are Biosphere reserves? Answer: Biosphere reserves are multipurpose protected areas with major objectives such as: Conservation of diversity and integrity of plants Promotion of ecological conservation Creation of awareness about environmental aspects and eco frien..

Question: The vitamin that is not fat soluble is_________. 1. vitamin A 2. vitamin B complex 3. vitamin D 4. vitamin E Answer: ..