SCIENCE REVIEWER MATATAG

Who created the first telephone used for long distance communication?

• Albert Einstein

• Thomas Edison

• Benjamin Franklin

• Alexander Graham Bell

What is the greatest contribution of Dr. Fe Del Mundo in the field of science?

• videophone

• biodiesel

• bamboo incubator

• artificial coral reefs

Why is it important to explain the impact of a scientific invention on everyday life?

• to create work for people

• to show off research skills

• to impress teachers and parents

• to understand the practical applications of science

A solar-powered garden lighting system was created in your local community. How will this invention impact the everyday lives of people in your community?

• It adds beauty to the garden.

• It only works during the daytime.

• It is a decoration with no practical use.

• It reduces electricity bills and lights up the garden at night.

What invention, often used in homes to clean floors, works by creating a suction to remove dust and debris?

• Dish washer

• Vacuum cleaner

• Air conditioner

• Electric fan

Which of the following materials is considered flammable and can easily catch fire?

• Glass

• Steel

• Paper

• Water

What should you do to prevent accidents when handling flammable materials at home?

• a) Store them near a heat source

• b) Keep them away from children and heat

• c) Pour water on them regularly

• d) Place them in direct sunlight

Which of the following is a chemical reaction?

• a) Ice melting into water

• b) Paper burning into ash

• c) A glass breaking into pieces

• d) Salt dissolving in water

What does it mean when a material is described as "biodegradable"?

.

• a) It can catch fire easily

• b) It reacts violently with water.

• c) It breaks down naturally by microorganisms.

• d) It never breaks down and lasts forever.

Why is it better to use biodegradable materials instead of non-degradable materials?

• a) Biodegradable materials are cheaper to make.

• b) Biodegradable materials take up less space in landfills and do not harm the environment.

• c) Non-degradable materials are safer to use.

• d) Non-degradable materials can be used forever without replacement.