### LS 2: Scientific Literacy and Critical Thinking

Directions: Read each item. Encircle the letter of the correct answer on the answer sheet provided for LS2.

1. Segregation of waste is very evident in schools and in the community. What is the best reason for this?

A) It helps prevent pollution.

B) It helps in the 5R process.

C) It helps lessen health problems.

D) All of the above

2. Which of the following shows the correct way of handling flammable items at home?

A) Leaving the stove unattended when cooking.

B) Flammable liquid not properly labelled and stored.

C) Keeping lighters and matches out of reach of children.

D) Candle left burning when everyone in the house is asleep.

3. What electrical energy can be transformed into when we switch on the light?

A) Sound energy

B) Light and heat energy

C) Light and sound energy

D) Chemical and sound energy

4. Which of the following DOES NOT contribute to the greenhouse effect that causes climate change?

A) Combustion of fuel

B) Use of aerosol sprays

C) Dust from volcanic eruptions

D) Use of solar-powered jeepney

5. Which of the following situations demonstrates the use of simple machines?

A) A girl eats a sandwich.