Christmas Vacation time pass

Which of the following characteristics will best prevent a tree from being blown over by high winds during a storm?

• deep roots

• long branches

• thick bark

• wide leaves

Food poisoning can be prevented by

• cooking meat and poultry thoroughly

• washing fruits and vegetables before eating or cooking

• storing food properly

• all of the above

A vacuum cleaner draws energy from an electric point,but does not use all that electrical energy in cleaning. In which form(s) is the wasted energy released?

• only as sound

• only as heat

• as heat and sound

• as sound and light

One way of controlling the number of mosquitoes is to spread a thin film of oil over open water bodies. How does oil help in reducing the number of mosquitoes?

• The oil is an insecticide which kills mosquitoes

• The oil prevents the larvae from breath in air

• The oil poisons the water and kills the larvae

• The oil helps the fish to eat the larvae

Sidharth was sitting in the back seat of a car while his mother was driving. Something happened because of which his head hit the seat in front of him.

What could have happened?

• The car suddenly turned to the left.

• The car started climbing up a slope

• The speed of the car increased.

• The car suddenly stopped.