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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.
| 1551. |
"Ultrasound" can |
| A. | break up kidney stones |
| B. | destroy the kidney stones |
| C. | stimulate the growth of kidney stones |
| D. | clot blood in the kidneys |
| Answer» B. destroy the kidney stones | |
| 1552. |
The pitch of every note is a certain |
| A. | wavelength |
| B. | amplitude |
| C. | frequency |
| D. | phase |
| Answer» D. phase | |
| 1553. |
All musical instruments make |
| A. | notes |
| B. | rhythm |
| C. | beat |
| D. | vibration |
| Answer» E. | |
| 1554. |
Nuclear batteries that produce small amount of current have |
| A. | longer life |
| B. | shorter life |
| C. | large size |
| D. | circular shape |
| Answer» B. shorter life | |
| 1555. |
The ionic chemical formula of magnesium is |
| A. | Mg-2 |
| B. | Mg+2 |
| C. | Mg- |
| D. | Mg+ |
| Answer» C. Mg- | |
| 1556. |
To multiply multiple elements with a number we use |
| A. | comma |
| B. | dot |
| C. | brackets |
| D. | cross |
| Answer» D. cross | |
| 1557. |
The number of neutrons in carbon-13 is |
| A. | 5 |
| B. | 6 |
| C. | 7 |
| D. | 13 |
| Answer» D. 13 | |
| 1558. |
The smallest atom in 'periodic table' yet found is |
| A. | hydrogen |
| B. | helium |
| C. | lithium |
| D. | magnesium |
| Answer» B. helium | |
| 1559. |
Density, boiling point and conductivity of heat are all |
| A. | physical properties |
| B. | chemical properties |
| C. | complex properties |
| D. | special properties |
| Answer» B. chemical properties | |
| 1560. |
Nonmetals are |
| A. | dull |
| B. | non ductile |
| C. | non malleable |
| D. | all of above |
| Answer» E. | |
| 1561. |
Non metals include |
| A. | iodine |
| B. | sulphur |
| C. | bromine |
| D. | all of above |
| Answer» E. | |
| 1562. |
"There are only four elements including air, earth, water and fire", it was believed by |
| A. | Germans |
| B. | Greeks |
| C. | Chinese |
| D. | Americans |
| Answer» C. Chinese | |
| 1563. |
A greenish yellow poisonous gas is |
| A. | chlorine |
| B. | carbon dioxide |
| C. | nitrogen |
| D. | helium |
| Answer» B. carbon dioxide | |
| 1564. |
The atomic number of carbon is 6, hence there are |
| A. | 2 protons and 4 electrons |
| B. | 6 protons and 12 electrons |
| C. | 6 protons and 12 neutrons |
| D. | 12 protons and 6 electrons |
| Answer» B. 6 protons and 12 electrons | |
| 1565. |
When shell K is completed, next electron moves to |
| A. | shell M |
| B. | shell S |
| C. | shell P |
| D. | shell L |
| Answer» E. | |
| 1566. |
The ionic chemical formula of aluminum is |
| A. | Al-2 |
| B. | Al+2 |
| C. | Al-3 |
| D. | Al+3 |
| Answer» E. | |
| 1567. |
Strong radioisotopes can be used to destroy |
| A. | organs |
| B. | bacteria |
| C. | viruses |
| D. | cancer cells |
| Answer» E. | |
| 1568. |
Neutrons have |
| A. | negative charge |
| B. | positive charge |
| C. | no charge |
| D. | both charges |
| Answer» D. both charges | |
| 1569. |
The dead sea is full of |
| A. | sand |
| B. | salt |
| C. | minerals |
| D. | shells |
| Answer» C. minerals | |
| 1570. |
The earth pulls object towards center, causing it to fall |
| A. | in the center |
| B. | on the ground |
| C. | on the polls |
| D. | on the floor |
| Answer» B. on the ground | |
| 1571. |
The force of attraction between two masses is called |
| A. | gravitational force |
| B. | friction |
| C. | pull |
| D. | push |
| Answer» B. friction | |
| 1572. |
We write on a board with chalk without slipping on floor is due to the presence of |
| A. | gravity |
| B. | friction |
| C. | pull |
| D. | push |
| Answer» C. pull | |
| 1573. |
The upward push acting on object which is immersed in liquid or gas partially or totally, is called |
| A. | gravity |
| B. | mass |
| C. | weight |
| D. | upthrust |
| Answer» E. | |
| 1574. |
The waves that are formed by vibration of hot particles, are known as |
| A. | radio waves |
| B. | micro waves |
| C. | infrared waves |
| D. | gamma rays |
| Answer» D. gamma rays | |
| 1575. |
The energy of sun, soil and plants is |
| A. | escaped from greenhouse |
| B. | trapped in greenhouse |
| C. | converted to light energy |
| D. | converted to nitrate |
| Answer» C. converted to light energy | |
| 1576. |
The faster the particles vibration, |
| A. | the more the frequency of waves |
| B. | the more the amplitude of waves |
| C. | the more the wavelength of waves |
| D. | the lesser the amplitude of waves |
| Answer» B. the more the amplitude of waves | |
| 1577. |
Global warming effects |
| A. | forests around the globe |
| B. | temperature of the globe |
| C. | wind and moisture of the globe |
| D. | water around the globe |
| Answer» D. water around the globe | |
| 1578. |
The name of the scientist who invented thermos is |
| A. | John Dalton |
| B. | James Dewar |
| C. | John Edison |
| D. | James Blake |
| Answer» C. John Edison | |
| 1579. |
By about every billion years, the brightness of the sun has been increasing up to |
| A. | 10 times |
| B. | 100 times |
| C. | 1000 times |
| D. | 10000 times |
| Answer» D. 10000 times | |
| 1580. |
The gas that is considered as "fuel of sun" is |
| A. | helium |
| B. | hydrogen |
| C. | oxygen |
| D. | nitrogen |
| Answer» C. oxygen | |
| 1581. |
As the earth rotates, we can see the stars moving anticlockwise around |
| A. | Sirius |
| B. | Polaris |
| C. | Black Eye |
| D. | Sun |
| Answer» C. Black Eye | |
| 1582. |
The 'Hubble telescope' is |
| A. | in space |
| B. | on an island |
| C. | on a mountain |
| D. | on an Iceland |
| Answer» B. on an island | |
| 1583. |
The study of 'constellations' and their movement is known as |
| A. | astronomy |
| B. | airspace technology |
| C. | astrology |
| D. | codicology |
| Answer» D. codicology | |
| 1584. |
One of the three things that affects the sound produced by vibration of string is |
| A. | weight of string |
| B. | length of string |
| C. | distance between two strings |
| D. | material of string |
| Answer» C. distance between two strings | |
| 1585. |
Sound is carried to our ears through |
| A. | pressure |
| B. | vibrations |
| C. | temperature effect |
| D. | humidity effect |
| Answer» C. temperature effect | |
| 1586. |
A device for viewing oscillations by a display on the screen of a cathode ray tube is called |
| A. | telescope |
| B. | microscope |
| C. | oscilloscope |
| D. | stethoscope |
| Answer» D. stethoscope | |
| 1587. |
Tiny lumps of solid matter grew in kidney are known as |
| A. | kidney larva |
| B. | kidney stone |
| C. | kidney salts |
| D. | urea stone |
| Answer» C. kidney salts | |
| 1588. |
Light travels in |
| A. | vacuum only |
| B. | curled lines |
| C. | straight lines |
| D. | air only |
| Answer» D. air only | |
| 1589. |
A color filter removes |
| A. | bright colors |
| B. | dull colors |
| C. | unwanted colors |
| D. | wanted colors |
| Answer» D. wanted colors | |
| 1590. |
Converging means to |
| A. | spread out |
| B. | invert |
| C. | bring together |
| D. | shrink |
| Answer» D. shrink | |
| 1591. |
For long-sightedness, the lenses that are used, are |
| A. | convex |
| B. | concave |
| C. | biconcave |
| D. | flat lenses |
| Answer» B. concave | |
| 1592. |
The critical angle is basically the |
| A. | angle of incidence |
| B. | angle of refraction |
| C. | angle of reflection |
| D. | angle of rarefaction |
| Answer» B. angle of refraction | |
| 1593. |
'Stigma' of insect pollinated flowers is |
| A. | sticky |
| B. | feathery |
| C. | plain |
| D. | dry |
| Answer» B. feathery | |
| 1594. |
Another phrase used for 'asexual reproduction' is |
| A. | anti sexual reproduction |
| B. | unisexual reproduction |
| C. | anti sexual propagation |
| D. | vegetative propagation |
| Answer» E. | |
| 1595. |
The flowers which are pollinated by means of wind have |
| A. | bright colored petals and attractive scent |
| B. | dull colored petals and attractive scent |
| C. | bright colored petals and bad small |
| D. | dull colored petals and no smell |
| Answer» E. | |
| 1596. |
The food store comes from |
| A. | soil |
| B. | air |
| C. | water |
| D. | parent plant |
| Answer» E. | |
| 1597. |
The pollen grains in anther are |
| A. | female sex cells |
| B. | male sex cells |
| C. | bisexual cells |
| D. | transsexual cells |
| Answer» C. bisexual cells | |
| 1598. |
When a note is played by a string instrument, it produces |
| A. | single vibration |
| B. | double vibrations |
| C. | multiple vibrations |
| D. | rhythm |
| Answer» D. rhythm | |
| 1599. |
Wind instruments make sound by allowing air to |
| A. | cut through the tubes |
| B. | vibrate through the tubes at different lengths |
| C. | increase the frequency |
| D. | decrease the frequency |
| Answer» C. increase the frequency | |
| 1600. |
A long thick tube produces |
| A. | low note |
| B. | high note |
| C. | deep note |
| D. | low pitched note |
| Answer» D. low pitched note | |