science for grade 7

- This is a representative list of topics covered in our Grade 7 Science program - however all programs will be customized for the individual studen..

Question: What is the final velocity of a body moving against gravity when it attains the maximum height? 1. Zero 2. 3. 4. 2gh A nswer: ..

Question: Define the terms velocity and wavelength applied to sound wave and state the relation between velocity, frequency and wavelength. Answer: The distance traveled by a wave in one second is its velocity. The distance traveled by the wave when it completes one oscillation. It is t..

Question: Two coils have a combined resistance of 25 when connected in series and a resistance of 4 when connected in parallel. What is the resistance of each coil? Answer: Let the resistance be R 1 and R 2 , and R s represents resistances in series and R p represents resistance ..

Question: An alcohol and an ether have same molecular formula C 2 H 6 O. Draw their structural formula, indicating their functional groups. Answer: Ether -OH is the functional group in ethyl alcohol while O- is the functional group in ether. Ethyl alcohol is an isomer of dimethyl ethe..

Question: Who discovered the nucleus within an atom? And how? Answer: Ernest Rutherford discovered the nucleus within an atom in his alpha-ray scattering experiment. The arrangement of the alpha-particle scattering experiment is as follows: Rutherford produced a narrow beam of partic..

Calculate the gram atoms present in 8g of oxyg..

Question: The class Aves have all the following features except that their 1. fore limbs are modified into wings 2. respiration is not through lungs 3. heart is 4 chambered 4. skeleton is light Answer: ..

Question: Name the property of matter due to which a body continues in its state of rest or uniform motion unless an external force acts on it. 1. Inertia 2. Elasticity 3. Viscosity 4. Density Answer: ..

Question: Why is the golgi apparatus called the secretory organelle of the cell? Answer: This is because it packages material synthesized in the ER and dispatches it to intracellular and (plasma membrane and lysosomes) extracellular targets..