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MCQOPTIONS
This section includes 2268 Mcqs, each offering curated multiple-choice questions to sharpen your Grade7 knowledge and support exam preparation. Choose a topic below to get started.
| 2151. |
Stars in a group or congregation are called |
| A. | galaxies |
| B. | milky way |
| C. | space |
| D. | atmosphere |
| Answer» B. milky way | |
| 2152. |
The movement of stars is felt due to earth's |
| A. | revolution |
| B. | rotation |
| C. | spin |
| D. | movement |
| Answer» C. spin | |
| 2153. |
The distance of sun from earth is nearly |
| A. | 150 million km |
| B. | 120 million km |
| C. | 100 million km |
| D. | 50 million km |
| Answer» B. 120 million km | |
| 2154. |
Electric companies charge for |
| A. | energy |
| B. | power |
| C. | resistance |
| D. | units |
| Answer» E. | |
| 2155. |
For current to flow, the circuit should be |
| A. | parallel |
| B. | in series |
| C. | complete |
| D. | hot |
| Answer» D. hot | |
| 2156. |
The strength of electromagnet can be increased by introducing a soft iron core |
| A. | outside the coil |
| B. | inside the coil |
| C. | round the coil |
| D. | above the coil |
| Answer» C. round the coil | |
| 2157. |
The electrolyte used in the purification of copper is |
| A. | copper nitrate |
| B. | copper chloride |
| C. | copper sulphate |
| D. | copper carbonate |
| Answer» D. copper carbonate | |
| 2158. |
Electrolysis is also used to purify |
| A. | sodium |
| B. | copper |
| C. | silver |
| D. | potassium |
| Answer» C. silver | |
| 2159. |
Atoms are linked together by chemical bonds. The two common chemical bonds are |
| A. | ionic and dative bonds |
| B. | ionic and covalent bonds |
| C. | dative and covalent bonds |
| D. | ionic and metallic bonds |
| Answer» C. dative and covalent bonds | |
| 2160. |
The number of elements are approximately |
| A. | fifty |
| B. | eighty |
| C. | hundred |
| D. | two hundred |
| Answer» D. two hundred | |
| 2161. |
The nearest shell to a nucleus is called |
| A. | shell A |
| B. | shell K |
| C. | shell S |
| D. | shell C |
| Answer» D. shell C | |
| 2162. |
Sodium and chlorine are attracted to each other because they are |
| A. | ions |
| B. | positively charged |
| C. | negatively charged |
| D. | oppositely charged |
| Answer» E. | |
| 2163. |
Medical instruments can be sterilized using |
| A. | heat |
| B. | boiled water |
| C. | radiations |
| D. | energy |
| Answer» D. energy | |
| 2164. |
Against resistance when electric current is forced through a conductor, electrons collide with the atoms of conductor which make them |
| A. | hot |
| B. | cold |
| C. | vibrate |
| D. | tremble |
| Answer» D. tremble | |
| 2165. |
An example in which light emitting diodes are used, is |
| A. | calculator |
| B. | hard drive |
| C. | optical drive |
| D. | analog watch |
| Answer» B. hard drive | |
| 2166. |
The first thing on which the amount of consumed energy depends, is |
| A. | amount of ions in a wire |
| B. | amount of resistance |
| C. | amount of electron's flow |
| D. | length of time, the appliance has been used for |
| Answer» E. | |
| 2167. |
If temperature rises very high, it can be used in |
| A. | electric lamps |
| B. | electric heaters |
| C. | electric coolers |
| D. | electric fans |
| Answer» B. electric heaters | |
| 2168. |
The resistors that have set resistance, are known as |
| A. | fixed resistors |
| B. | variable resistors |
| C. | thermistors |
| D. | fixators |
| Answer» B. variable resistors | |
| 2169. |
Black colored objects reflect |
| A. | less heat |
| B. | more heat |
| C. | no heat |
| D. | excessive heat |
| Answer» C. no heat | |
| 2170. |
Heat of sun that travels through vacuum is known as |
| A. | conducting heat |
| B. | convective heat |
| C. | radiant heat |
| D. | infrared heat |
| Answer» D. infrared heat | |
| 2171. |
The color and texture that are the best reflector of radiant heat are |
| A. | black and shiny |
| B. | white and shiny |
| C. | black and dull |
| D. | white and dull |
| Answer» C. black and dull | |
| 2172. |
In summer, people paint their cars with silver color in order to prevent |
| A. | release of heat |
| B. | absorption of heat |
| C. | transfer of heat |
| D. | strength of heat |
| Answer» C. transfer of heat | |
| 2173. |
If atmosphere doesn't act like greenhouse, the temperature of earth would become |
| A. | too pleasant to enjoy |
| B. | too cold to survive |
| C. | too hot to survive |
| D. | too terrible to survive |
| Answer» C. too hot to survive | |
| 2174. |
When heating element from cooker is turned out, at first it emits |
| A. | heat energy |
| B. | gamma rays |
| C. | infrared waves |
| D. | radio waves |
| Answer» D. radio waves | |
| 2175. |
At night, the convection current of land and sea |
| A. | remains same |
| B. | stops |
| C. | is reversed |
| D. | is converted to radiation current |
| Answer» D. is converted to radiation current | |
| 2176. |
Electric companies use thermal imaging camera to identify |
| A. | the resistivity of a wire |
| B. | the resistivity of a resistor |
| C. | overheating of wires and power lines |
| D. | the heat released by electrical appliance |
| Answer» D. the heat released by electrical appliance | |
| 2177. |
Low 'infrared waves' |
| A. | cannot pass through glass |
| B. | can pass through glass |
| C. | cannot pass through walls |
| D. | can pass through walls |
| Answer» C. cannot pass through walls | |
| 2178. |
The loss of heat in winter is a major waste of |
| A. | fuel |
| B. | electricity |
| C. | power |
| D. | energy |
| Answer» B. electricity | |
| 2179. |
Rovers were the |
| A. | robots |
| B. | satellites |
| C. | voyagers |
| D. | space probes |
| Answer» B. satellites | |
| 2180. |
The earth spins on its own |
| A. | orbit |
| B. | horizon |
| C. | axis |
| D. | path |
| Answer» D. path | |
| 2181. |
During lunar eclipse earth blocks out the |
| A. | moon |
| B. | sun |
| C. | stars |
| D. | meteor |
| Answer» B. sun | |
| 2182. |
At night, the planets Venus, Mars, Jupiter and Saturn can be seen with a |
| A. | naked eye |
| B. | microscope |
| C. | telescope |
| D. | binocular |
| Answer» B. microscope | |
| 2183. |
Mankind refers to the |
| A. | organisms |
| B. | human species |
| C. | living beings |
| D. | living creatures |
| Answer» C. living beings | |
| 2184. |
Respiration is a |
| A. | physical process |
| B. | chemical process |
| C. | biological process |
| D. | temporary process |
| Answer» C. biological process | |
| 2185. |
Photosynthesis is an example of |
| A. | condensation reaction |
| B. | exothermic reaction |
| C. | reversible reaction |
| D. | endothermic reaction |
| Answer» E. | |
| 2186. |
Number of atoms in one molecule of ethene is |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» E. | |
| 2187. |
The fixed position of particles in solids is due to |
| A. | kinetic energy |
| B. | force of attraction |
| C. | pressure on atoms |
| D. | |
| Answer» C. pressure on atoms | |
| 2188. |
The shape of liquid depends on the |
| A. | shape of container |
| B. | surface area of container |
| C. | volume of container |
| D. | mass of container |
| Answer» B. surface area of container | |
| 2189. |
To make seed a flower there must be |
| A. | reproduction |
| B. | pollination |
| C. | growing |
| D. | fertilization |
| Answer» C. growing | |
| 2190. |
A tube formed by pollen grains from the stigma to the ovaries is called |
| A. | pollen pipe |
| B. | pollen tube |
| C. | male gamete tube |
| D. | generative tube |
| Answer» C. male gamete tube | |
| 2191. |
The outer shell of the embryo is known as |
| A. | cotyledon |
| B. | coat |
| C. | testa |
| D. | integument |
| Answer» D. integument | |
| 2192. |
Inside every seed, there is a miniature plant known as |
| A. | zygote |
| B. | embryo |
| C. | ovule |
| D. | endosperm |
| Answer» C. ovule | |
| 2193. |
The tip of the carpel is known as |
| A. | stigma |
| B. | style |
| C. | filament |
| D. | anther |
| Answer» B. style | |
| 2194. |
The speed of particles is fastest in |
| A. | solids |
| B. | liquids |
| C. | gases |
| D. | fluids |
| Answer» D. fluids | |
| 2195. |
'Bakelite' is used to |
| A. | insulate heater handles |
| B. | increase heat conductivity |
| C. | increase electrical conductivity |
| D. | insulate electrical equipment |
| Answer» E. | |
| 2196. |
The force of attraction between particles of gases is |
| A. | weaker than liquids but stronger than solids |
| B. | weaker than liquids and solids both |
| C. | stronger than solids but weaker than gases |
| D. | stronger than solids and liquids both |
| Answer» C. stronger than solids but weaker than gases | |
| 2197. |
The water melts and freezes at |
| A. | different temperatures |
| B. | different pressure |
| C. | same temperature |
| D. | same pressure |
| Answer» D. same pressure | |
| 2198. |
The gases that required to manufacture 'PVC' are |
| A. | methane and chlorine |
| B. | ethene and chlorine |
| C. | methane, ethene and chlorine |
| D. | propane, oxygen and chlorine |
| Answer» C. methane, ethene and chlorine | |
| 2199. |
Short circuit occurs when the current takes up |
| A. | more voltage |
| B. | less voltage |
| C. | short path |
| D. | long path |
| Answer» D. long path | |
| 2200. |
Materials that do not allow electrons to flow through them are known as |
| A. | insulators |
| B. | conductors |
| C. | electrolytes |
| D. | bases |
| Answer» B. conductors | |