FIRST PERIODICAL TEST IN SCIENCE 4

What did Ronaldo Pagsanghan invented?

• Unsinkable boat

• Speed boat

• motor boat

• Paper boat

Why did Mr. Pagsanghan invented the boat?

• He was alarmed by the delay of deployment rescue boats

• He wants to show off his skill an knowledge in building boats

• He wants to submit it as a project to his teacher in school

• He wants everybody to know him as a famous inventor

How will the unsinkable boat benefit people during a typhoon?

• It can be used as a rescue boat

• It can be used for snorkelling

• It can be used for storing fish

• It can be used for hunting sharks

Which of the following is the property of the materials in the unsinkable boat that makes it float?

• buoyant

• heavy

• flammable

• Combustible

When can the Barangay Calmay use the unsinkable boat that was turned over to them by DOST?

• During emergency and rescue

• During boat competitions

• During beauty pageants

• During summer vacation

How can the harmful changes caused by burning waste be prevented?

• By burning wastes in the incinerator

• By burning waste in the backyard

• By practicing the 5Rs of waste management

• By changing waste materials to ashes

Why should there be a restriction in burning wastes?

• Burning wastes can cause diseases

• Burning waste can cause progress

• Burning waste can cause cleanliness

• Burning waste can cause livelihood

Which of the following practices can cause harm to people and the environment?

• Burning waste

• Recycling

• Reusing waste

• Reducing waste

What will happen if sulfuric acid is exposed to water or moisture?

• Heat and flammable/toxic gases may be produced

• Materials will be dissolved and will disintegrate

• Cooler temperature will be produced

• Water will increase its conductivity

To prevent the dangers that can result from water reactive materials, which of the following should be done?

• Store water reactive materials away from water

• Mix water reactive materials with water

• Let children play with water reactive materials

• Store water reactive materials in carton boxes