science 6

1.       When driving a bike, it is easy to stop using a break because of the____________ between the brakes and tires.

•    Gravity   

• motion   

• friction 

• shoes

Which object would be most difficult to lift against gravity?

• dog      

• an egg

• a washing machine

• ball

1.       Which is the best example of gravity?

•   A guava fruit falls down

• A boy swims in the pool

•   A man pushes a cart on the rugged road.

• A ball rolling on the ground

1.       Rusty screws are difficult to remove. What will you do to remove it ?

• Use lubricants   

• use wax  

• use rollers     

• use wheels

1.       Why is it easy to open a dry cap of soda/ soft drink than a wet cap? It is because_______

• There is a lesser friction between the dry cap and hand

• There is a greater friction between the dry cap and hand

•   The dry cap of soda is slippery

• Both dry and  wet caps have smooth surface.

1.       People and animals are free from walking and running around. Why do feet stay on the ground instead of floating ? because of?

• Force

• friction 

• gravity

• weight

1.       Arman wins in the light flyweight division, boxing competition. He weighed 49 kg. how much is the gravitation force exerted to him

a.       48 kg                      b. 49 kg                 c. 50 kg                 d. 55kg

• 48 kg   

• 49 kg

• 50 kg  

• 55kg

1.       The rougher the surface the greater the friction. Which of this example will support the above statement?

• Between the muddy ground and slipper

•   Between the wet road and the running car

• Between the rolling ball and the grassy field

• Between the rolling skates and the icy surface of the ground

1.       After applying lubricant on the chain and gear of your bicycle, you can now pedal it easily. Why is it so?

• The lubricant cleaned the chain and gear

• The lubricant removed the rust form the chain

• The lubricant reduced the friction between the chain and gear

•   The lubricant increased the friction between the chain and gear

1.       Your kite flies up in the air and then when the wind stops blowing , it goes down. Why?

• The force of gravity flies the kite up and moves it down

• Gravity pulls the kite down when the wind stops blowing

• The wind pulls the kite down to the ground