SCIENCE4 QUARTER 1 REVIEWER

1.  Your surroundings became dirty and polluted because people mixed plastics, food scraps, and bottles in one trash bin. To solve this, you started following waste segregation, recycling, and composting to protect the environment. What important practice are you applying to keep the community clean?

1. A Grade 4 student wants to lessen the garbage at home while also helping their garden plants grow healthier. They collected fruit peels, dried leaves, and grass cuttings, then placed them in a pit until they turned into rich soil. What process of recycling organic waste is the student practicing? 

1. A very important tool in radiation therapy for treating tumors.

1. Provides a long-lasting and affordable light source, which changed

2. the way we light our homes and communities.

1. A chemical property of iron when it is expose to moisture and oxygen. 

1. This was innovated by Angel Alcala. It provides habitats for various marine species,

2. including fish, invertebrates. and plants.

1. He introduced methods of drawing out and producing biodiesel from coconuts and sugarcane.

1. The chemical property of materials that easily catch fire is called _____.

1. _____  is one of the cleaning agents often used to clean bathrooms.

Answer: Muriatic acid

1. This chemical property forms a new product that can be dangerous

2. to our health and even to properties.