Science 4 Quarter 1 Review

1. Which among the following materials does not sink in water?

• rock

• Coin

• Rubber Slippers

• gold necklace

If you are exposed to garbage, what kind of illness would you probably get?

• nose bleed

• heart failure

• asthma

• goiter

Which of these garbage materials do not undergo decay?

• used cooking oil

• plastic, glass, bottles

• fruit peelings

• leftover food

Wastes that are not properly disposed may ______________.

• become breeding places of pests such as mosquitoes and flies

• cause loss of humus soil

• speed up the materials to decay

• allow free flow of rain water run off

What should people do with their garbage to prevent oneself from getting sick?

• drink untreated water

• take medicine

• dispose waste materials properly

• throw the waste materials anywhere in your surroundings

Shine cuts a piece of writing pad. Describe what changes happened in the property of the piece of paper when it was cut.

• The piece of writing pad changed its size and shape.

• The piece of writing pad changed its color and texture.

• The piece of writing pad changed its texture and weight.

• The piece of writing pad changed its odor and texture.

What are the factors that contribute to the decaying process of the materials?

• air and plastic materials

• sunlight only

• human and animals

• sunlight, soil, water, and action of microorganisms

Which of the following materials float in water?

• rock

• hammer

• 5-peso coin

• rubber duck

How should decaying wastes be disposed?

• By reusing

• by composting

• by recycling

• by eating

A frozen chocolate melts when it is out of the refrigerator because the temperature is __________?

• increasing

• decreasing

• still the same

• none of the above