Science & Tech Part-1
Physics • Chemistry • Biology • Environment | 20 MCQs | Practice and Earn XP
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📌 Quick Summary — Science & Tech
⚛️ Physics
- Motion: Acceleration is defined as the rate of change in the velocity of an object per unit time.
- Electricity: The SI unit used to measure electric voltage is the Volt.
- Earth Science: A Seismograph is the instrument used to measure vibrations caused by earthquakes.
🧪 Chemistry
- Alkalies & Bases: Ammonium hydroxide is commonly found in window cleaners. A base changes red litmus paper to Blue.
- Compounds: The chemical name of ‘Neela Thotha’ is Copper Sulphate. The molecular formula for baking soda is NaHCO₃.
- Elements: Silver compounds are used in black and white photography. Hydrogen has an approximate atomic mass of 1.
🧬 Biology
- Anatomy & Cells: The Lysosome is referred to as the ‘suicide bag’ of the cell. The Pineal gland produces the hormone Melatonin.
- Plants & Ecosystems: Plants have 2 types of pathways for conducting tubes (xylem and phloem). The fibrous peel of a coconut is made of Sclerenchyma tissue.
- Health & Diet: Fats, oils, and sweets are placed at the top of the Food Guide Pyramid. Dengue is transmitted by the Aedes mosquito.
- Animal Kingdom: Aquatic animals require oxygen dissolved in water to breathe. Animals are considered mobile sources of food.
🌍 Environment & Tech
- Decomposition: Decomposers are responsible for decomposing waste into smaller particles.
- Global Policies: The Vienna Convention is associated with Ozone Layer Protection.
- Energy: In a terrestrial ecosystem, green plants absorb approximately 1% of the sunlight energy that falls on their leaves.
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