Question

Design a simple scientific investigation on a specific problem in your area or at home, write it on your science notebook. for example, you turn the light switch ON and the bulb does not light inside your room. use scientific method in your investigation. describe each step that you will do to solve the problem observation Question

a. hypothesis
b. Experiment
c. analysis
d. conclusion​

Answer 1

Problem: The light bulb in my room does not light up when I turn the switch ON.

Observation: The light bulb is not emitting any light when I try to turn it ON.

Question: Why is the light bulb not lighting up when I turn the switch ON?

Hypothesis: The light bulb may not be working because it could be burned out or there might be an issue with the electrical connection.

Experiment:

Step 1 - Check the electrical connection: I will start by checking if the light bulb is securely screwed into the socket. If it's loose, I'll tighten it and try turning the switch ON again.

Step 2 - Replace the bulb: If the bulb is securely connected and still doesn't light up, I will replace it with a new working bulb.

Step 3 - Test the switch: If the new bulb doesn't work either, I will test the switch by using a known working bulb from another room. If the borrowed bulb lights up, the switch is functional.

Analysis:

If the light bulb lights up after tightening or replacing it, then the problem was likely due to a loose or burned-out bulb.

If the new bulb doesn't light up either, but the borrowed bulb does, the issue may be with the original bulb batch.

If the borrowed bulb doesn't light up either, then the issue might be with the switch or the electrical connection.

Conclusion:

Based on the experiment and analysis:

If the light bulb works after tightening or replacing it, the problem was a faulty bulb.

If the borrowed bulb lights up using the same switch, the issue lies with the original batch of bulbs.

If the borrowed bulb also doesn't light up, the problem might be with the switch or the electrical connection.

Through this investigation, I will have identified the potential causes for the light bulb not lighting up and can take appropriate actions to resolve the issue.

Answer 2

**Problem:** The light bulb in my room doesn't light up when I turn the switch on.

**Observation:** When I turn the light switch on, the light bulb doesn't emit any light.

**Question:** Why is the light bulb not lighting up when the switch is turned on?

**Hypothesis:** The light bulb might not be working due to a burnt-out filament.

**Experiment:**

1. **Step 1 - Observation and Documentation:**

- Observe the light bulb carefully.

- Note any visible damage or signs of a burnt filament.

- Record these observations in detail.

2. **Step 2 - Testing the Hypothesis:**

- Replace the suspected burnt-out bulb with a new bulb that is known to be functional.

- Turn the light switch on and observe if the new bulb emits light.

3. **Step 3 - Comparison:**

- Compare the behavior of the new bulb with the old one.

- If the new bulb lights up, it indicates that the old bulb was indeed burnt out.

**Analysis:**

- The new bulb lit up when the switch was turned on, demonstrating that the old bulb was the problem.

- This supports the hypothesis that the old bulb had a burnt filament.

**Conclusion:**

- The light bulb in my room was not lighting up because its filament was burnt out.

- Replacing the old bulb with a new one resolved the issue.

- Regular maintenance and replacement of light bulbs when they burn out is necessary to ensure proper lighting in the room.