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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.
| 701. |
A chemical reaction can be explained and presented in the form of |
| A. | chemical symbol |
| B. | chemical formula |
| C. | chemical properties |
| D. | word equation |
| Answer» E. | |
| 702. |
Gold, silver, copper and aluminum are |
| A. | metals |
| B. | non metals |
| C. | alkalis |
| D. | metalloids |
| Answer» B. non metals | |
| 703. |
Solid 'carbon dioxide' crystals make |
| A. | fizzy drinks |
| B. | dry ice |
| C. | airships fly |
| D. | balloons risen |
| Answer» C. airships fly | |
| 704. |
'Ag' is the symbol of element |
| A. | silver |
| B. | gold |
| C. | iron |
| D. | copper |
| Answer» B. gold | |
| 705. |
If 1g of hydrogen is mixed with 8g of oxygen, the produced water will be |
| A. | 9g |
| B. | 7g |
| C. | 8g |
| D. | 1g |
| Answer» B. 7g | |
| 706. |
In fire fighting another use of thermal imaging camera is |
| A. | spotting source of fire |
| B. | spotting people in the fire |
| C. | identifying flammable objects |
| D. | identifying wood and steel |
| Answer» C. identifying flammable objects | |
| 707. |
The insulation reduces the amount of heat |
| A. | leaving the house |
| B. | entering the house |
| C. | transferring the chamber |
| D. | releasing the chamber |
| Answer» C. transferring the chamber | |
| 708. |
The color and texture of a poor reflector of radiant heat is |
| A. | black and shiny |
| B. | black and dull |
| C. | white and shiny |
| D. | white and dull |
| Answer» C. white and shiny | |
| 709. |
One example of bad thermal insulator is |
| A. | potassium |
| B. | paper |
| C. | cork |
| D. | wool |
| Answer» B. paper | |
| 710. |
If a substance is hot, its particles will |
| A. | move fast than the cooler object |
| B. | move slow than the cooler object |
| C. | move as the cooler object |
| D. | may move fast or slow than the cooler object |
| Answer» B. move slow than the cooler object | |
| 711. |
Radiation is prevented by |
| A. | glass walls |
| B. | silver painted glass walls |
| C. | black painted glass walls |
| D. | metal walls |
| Answer» C. black painted glass walls | |
| 712. |
'Metals' are the best |
| A. | insulators of heat |
| B. | conductors of heat |
| C. | conductors of light |
| D. | insulators of electricity |
| Answer» C. conductors of light | |
| 713. |
Handles of saucepans and other cooking utensils are |
| A. | thermal conductors |
| B. | thermal insulators |
| C. | electrical conductors |
| D. | metalloids |
| Answer» C. electrical conductors | |
| 714. |
Greenhouse gases effect on earth's atmosphere is increased by |
| A. | CFCs (chlorofluorocarbons) |
| B. | air conditioners |
| C. | perfumes |
| D. | burning fossil fuels |
| Answer» E. | |
| 715. |
The rise of warm air and fall of cool air in order to fill the space forms a |
| A. | radiation current |
| B. | conduction current |
| C. | convection current |
| D. | air current |
| Answer» D. air current | |
| 716. |
From earth, sun is about |
| A. | 100 million km away |
| B. | 125 million km away |
| C. | 150 million km away |
| D. | 175 million km away |
| Answer» D. 175 million km away | |
| 717. |
Waves that pass through the glass walls of greenhouse are in the form of |
| A. | gamma rays |
| B. | x-rays |
| C. | infrared waves |
| D. | radio waves |
| Answer» D. radio waves | |
| 718. |
The temperature of horse shoe is approximately |
| A. | 200 °C |
| B. | 700 °C |
| C. | 1000 °C |
| D. | 2000 °C |
| Answer» C. 1000 °C | |
| 719. |
Heat of an object is known as |
| A. | thermometer |
| B. | thermal energy |
| C. | temperature |
| D. | pressure |
| Answer» D. pressure | |
| 720. |
An example of conductor of heat is |
| A. | paper |
| B. | cloth |
| C. | air |
| D. | aluminum |
| Answer» E. | |
| 721. |
When warm air rises over sea, its previous position is replaced by |
| A. | more warm air from sea |
| B. | cool air from sea |
| C. | more cool air from land |
| D. | warm air from land |
| Answer» D. warm air from land | |
| 722. |
Earth is warm by heat energy coming from |
| A. | sun |
| B. | moon |
| C. | universe |
| D. | space |
| Answer» B. moon | |
| 723. |
At night, sea water gets |
| A. | warm than land |
| B. | cool than land |
| C. | both a and b |
| D. | very hot |
| Answer» B. cool than land | |
| 724. |
Warm air rises because it is |
| A. | more dense than cool air |
| B. | equally dense as cool air |
| C. | less dense than cool air |
| D. | completely dense |
| Answer» D. completely dense | |
| 725. |
Thermal energy travels in |
| A. | one way |
| B. | two ways |
| C. | three ways |
| D. | four ways |
| Answer» D. four ways | |
| 726. |
Color and texture that is the best absorbate of radiant heat is |
| A. | black and shiny |
| B. | white and shiny |
| C. | black and dull |
| D. | white and dull |
| Answer» D. white and dull | |
| 727. |
When air on the land is warm, the air on the sea is |
| A. | also warm |
| B. | cool |
| C. | normal |
| D. | both b and c |
| Answer» C. normal | |
| 728. |
We can see sunlight because |
| A. | light can pass through air |
| B. | light can pass through opaque solids |
| C. | light can pass through vacuum |
| D. | light travels in straight line |
| Answer» D. light travels in straight line | |
| 729. |
The transfer of thermal energy without any medium is known as |
| A. | conduction |
| B. | convection |
| C. | radiation |
| D. | vibration |
| Answer» D. vibration | |
| 730. |
The number of walls of a thermos is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 731. |
Comparing hot water bath and horse shoe, more heat is present in |
| A. | horse shoe |
| B. | hot water bath |
| C. | both |
| D. | hot water bottle |
| Answer» C. both | |
| 732. |
The glass walls help to resist the transfer of heat by |
| A. | conduction only |
| B. | convection only |
| C. | radiation only |
| D. | conduction and convection |
| Answer» E. | |
| 733. |
Light, radiant heat and radio waves travel at the same rate because they are |
| A. | of different density |
| B. | different elements |
| C. | part of electromagnetic spectrum |
| D. | part of energy |
| Answer» D. part of energy | |
| 734. |
When hot air rises |
| A. | cool air takes its place |
| B. | cools down and falls back |
| C. | forms clouds |
| D. | condenses |
| Answer» B. cools down and falls back | |
| 735. |
The warm air rises from the |
| A. | land |
| B. | sea |
| C. | sun |
| D. | trees |
| Answer» B. sea | |
| 736. |
All heat 'insulators' are |
| A. | metalloids |
| B. | transition metals |
| C. | non metals |
| D. | metals |
| Answer» D. metals | |
| 737. |
When the solar eclipse occurs |
| A. | only heat is cut off |
| B. | only light is cut off |
| C. | heat and light both are cut off |
| D. | none is cut off |
| Answer» D. none is cut off | |
| 738. |
Heat from the sun comes in the form of radiations. These radiations are known as |
| A. | Gamma radiations |
| B. | Infrared radiations |
| C. | Ultraviolet radiations |
| D. | Micro radiations |
| Answer» C. Ultraviolet radiations | |
| 739. |
The wind systems are created due to the change in |
| A. | pressure |
| B. | temperature |
| C. | humidity |
| D. | mass |
| Answer» C. humidity | |
| 740. |
'Thermos' keeps |
| A. | liquids hot |
| B. | liquids cold |
| C. | liquids hot or cold, depending on their temperature |
| D. | liquids at normal temperature |
| Answer» D. liquids at normal temperature | |
| 741. |
The entrance of germs in the body due to contaminated food is known as |
| A. | bad entrance |
| B. | food poisoning |
| C. | staleness |
| D. | Infected poisoning |
| Answer» C. staleness | |
| 742. |
The acid that is found in our stomach, is |
| A. | hydrochloric acid |
| B. | sulfuric acid |
| C. | carbonic acid |
| D. | nitric acid |
| Answer» B. sulfuric acid | |
| 743. |
Diarrhea takes out too much water and minerals which causes |
| A. | dehydration |
| B. | hunger |
| C. | dryness |
| D. | lack of energy |
| Answer» B. hunger | |
| 744. |
The main cause of indigestion of food is |
| A. | lack of chewing |
| B. | lack of water in the body |
| C. | lack of saliva |
| D. | infection |
| Answer» B. lack of water in the body | |
| 745. |
"Feces" gets |
| A. | hard and wet in constipation |
| B. | soft and dry in constipation |
| C. | hard and dry in constipation |
| D. | soft and wet in constipation |
| Answer» D. soft and wet in constipation | |
| 746. |
The process of absorption of food molecules from digestive track by the blood vessels is called |
| A. | absorption |
| B. | assimilation |
| C. | digestion |
| D. | ingestion |
| Answer» B. assimilation | |
| 747. |
Diarrhea takes place due to |
| A. | biting by mosquitoes |
| B. | eating contaminated food |
| C. | using infected syringes |
| D. | cold |
| Answer» C. using infected syringes | |
| 748. |
If we eat too much contaminated food, the stomach forces us to |
| A. | vomit |
| B. | digest |
| C. | egest |
| D. | exercise |
| Answer» B. digest | |
| 749. |
Proteins are converted into |
| A. | amino acids |
| B. | glucose |
| C. | fats |
| D. | fibers |
| Answer» B. glucose | |
| 750. |
The removal of waste products from a body is known as |
| A. | egestion |
| B. | ingestion |
| C. | digestion |
| D. | absorption |
| Answer» B. ingestion | |