ANSWERS
1. **Reflection of Light:**
- **Definition:** Reflection of light is the bouncing back of light when it strikes a smooth surface.
2. **Potential and SI Unit:**
- **Potential:** Potential refers to electric potential, which is the amount of electric potential energy per unit charge at a point in an electric field.
- **SI Unit:** The SI unit of electric potential is the volt (V).
3. **Geo-stationary Satellites:**
- **Definition:** Geo-stationary satellites are satellites that orbit the Earth at the same rate as the Earth rotates, which allows them to remain stationary relative to a fixed point on the Earth's surface.
4. **Ohm's Law:**
- **Statement:** Ohm's Law states that the current passing through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature remains constant.
- **Mathematically:** \( I = \frac{V}{R} \), where \( I \) is current, \( V \) is voltage, and \( R \) is resistance.
5. **Diagram of Solar Cooker:**
- Diagram of a solar cooker is a practical illustration and is not provided in text format.
6. **Structure of a Flower:**
- The structure of a flower typically includes the following parts: sepals, petals, stamens, and carpels (pistil).
7. **Differences Between Lymph and Blood:**
- Key differences include composition, color, function, and components.
8. **Differences Between Metals and Non-metals:**
- Key differences include physical properties, chemical properties, and conductivity.
9. **Importance of Hemoglobin:**
- Hemoglobin is essential for transporting oxygen from the lungs to the rest of the body and carrying carbon dioxide back to the lungs for exhalation. It plays a crucial role in the respiratory process.
10. **Corona Visibility During Solar Eclipse:**
- The corona of the Sun becomes visible during a complete solar eclipse because the Moon completely blocks the bright solar disk, revealing the outer atmosphere (corona) of the Sun.
11. **Reflection and Laws of Reflection:**
- **Reflection:** Reflection is the phenomenon of bouncing back of light when it strikes a surface.
- **Laws of Reflection:**
1. The incident ray, the reflected ray, and the normal to the surface at the point of incidence all lie in the same plane.
2. The angle of incidence is equal to the angle of reflection.
12. **Binary Fission in Amoeba:**
- Binary fission in Amoeba involves the division of the cell into two daughter cells. The process is a form of asexual reproduction.
13. **Manufacture of Bleaching Powder:**
- The manufacture of bleaching powder involves the reaction of chlorine gas with dry slaked lime (calcium hydroxide).
14. **Difference Between Aerobic and Anaerobic Respiration:**
- Key differences include the presence or absence of oxygen, efficiency, and by-products.
15. **Global Warming and Causes:**
- **Definition:** Global warming refers to the gradual increase in the Earth's surface temperature.
- **Causes:** Greenhouse gas emissions, deforestation, industrial activities, and burning of fossil fuels.
16. **Electromagnetic Induction:**
- **Definition:** Electromagnetic induction is the process of generating an electromotive force (EMF) in a closed circuit by changing the magnetic field around the circuit.
17. **Brightness of the Sun:**
- The Sun appears brighter and bigger than other stars because it is much closer to the Earth than other stars in the night sky.
18. **Direct Current and Alternating Current:**
- **Direct Current (DC):** Current flows in one direction continuously.
- **Alternating Current (AC):** Current periodically changes direction.
19. **Diagram of Chromosome and Functions:**
- A chromosome diagram illustrates the structure of a chromosome with labeled components. Functions include carrying genetic information and aiding in the transmission of hereditary traits.
20. **Diagram of the Human Heart:**
- A labeled diagram of the human heart illustrates its four chambers (atria and ventricles) and major blood vessels (aorta and vena cava).
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