Materials that Absorb Water Presented by: RODERICK C. BULAN Science Teacher Name the different pictures and tell if it is solid, liquid or gas. SOLID SOLID SOLID SOLID Name the different pictures and tell if it is solid, liquid or gas. SOLID SOLID GAS LIQUID Why would some people prefer to use plastic bag than a paper bag? VS Absorb to take in (something, such as liquid) in a natural or gradual way. stones, untreated wood, and cork are a few examples of porous materials. • Porous materials have small holes that allow air or liquid to pass through. • These materials may also be called absorbent materials. NON-POROUS non-porous materials do not allow air or liquid to pass through. They may also be called nonabsorbent materials. \ Bring the following: THANK YOU! Get Three items from your bag and three more items inside the classroom. 1. What is the object made of? 2. Are these materials safe or harmful? Why? Recognizing if material is HARMFUL or USEFUL. Presented by: RODERICK C. BULAN Science Teacher Identify whether they are useful or harmful by putting a check mark (✓) on the appropriate column. Identify whether they are useful or harmful by putting a check mark (✓) on the appropriate column. When do we say that a material is useful or harmful? Useful • When they serve their purpose. • These may have properties such as durability, flexibility, elasticity, hardness, and resistance to water, heat, or acid. • Most of the useful materials can be reused and recycled. For example, a container for solid or liquid, when it is already empty, can still be used for other purposes such as a flower vase, a coin bank, or a house decor. Harmful • bring hazards. For example, a broken glass, jar can cause cuts or injury. • Toxic substances may also be present in the things you commonly use.These materials may bring harm to your health, environment, and other organisms when not used properly TRUE OR FALSE Consumers must read product labels when buying grocery items. TRUE OR FALSE Place fertilizers in containers and label them as poisonous TRUE OR FALSE Throw away anywhere the plastic bottles after using them. TRUE OR FALSE Labels are not important in classifying materials as to useful or harmful. TRUE OR FALSE Food allergen warnings are helpful especially for those who have allergies THANK YOU!
