CBSE ADDA

CBSE ADDA CBSE TEST PAPER-03 SCIENCE & TECHNOLOGY (Class-10) Chapter 6 : Life Process 1.  What are the raw materials  for photosynthesis? (1 mark) Answer : The raw materials and other necessary items required for photosynthesis are Sunlight, Water, CO 2 and Chlorophyll. 2. Give the energy transformation that takes place in the process of photosynthesis. (1 mark) Ans: Light energy converted into chemical energy 3. Write the equation of photosynthesis. (1 mark) Ans: Sunlight 6CO2 + 12H2O -----------> C6H12O6 + 6O2 + 6H2O chlorophyll 4. What is the respiratory organ of earthworm? (1 mark) Ans: Gaseous exchange occurs through moist skin by diffusion 5. Give the function of xylem. (1 mark) Ans:  Transport water and mineral to green leaves 6. Write any two functions of l...

Trend setter CBSE TEST PAPER-02 SCIENCE & TECHNOLOGY (Class-10)  Chapter 6 : Life Process 1. Point out of differences between an artery and vein. (1 mark) Ans: Any one: Artery 1. Vessels which carry blood from the heart to various body parts 2. Arteries carry oxygenated blood from the heart except pulmonary artery 3. Arteries have thick elastic muscular walls 4. Valves are absent 5. Blood flows under high pressure Vein 1. Vessels which carry blood from the various body parts to the heart 2. Veins carry deoxygenated blood from the various body parts except pulmonary vein 3. Veins have thin non elastic walls 4. Valves are present to prevent the backward flow of blood 5. Blood flows under low pressure 2. Write the two functions of kidneys.  Ans.  Osmoregulation and excretion. 3. Name the largest artery in human body. (1 mark) Ans: The largest artery in the human body is the aorta. It carries oxygenated blood...

CBSE class 10 Biology Chapter : control and coordination --- Trend Setter solved Problems Class 10 Trendsetter  solved  CBSE Test paper-01 1. How does the nervous tissue cause action?   Ans:. When a nerve impulse reaches the muscle,the muscle fibre must move by changing their shape.this is possible as muscle cells have special proteins that change both their shape and arrangement in the cell in response to nervous electrical impulses.when ths happens new arrangements of these proteins give the muscle different shapes. 2.Which organ secretes hormone when the blood sugar rises?name a digestive enzyme released by this organ. Ans: Pancreas secretes hormone insulin when sugar level rises.Digestive enzyme secreted by pancreas is  trypsin(that digests protein).  3.What will happen when plant is exposed to unidirectional light? Ans: .Phototropism i.e. bending of stem towards unidirectional flow of light. 4. A particular hormone r...

10 th  Polynomials Ch-02-Mathematics [Key points]  Check point [Formative Assessment] Þ   Any algebraic expression having non zero integral power (whole number) is called polynomial. Þ  If p(x) is a polynomial in x, the highest power of x in p(x) is called the degree of the polynomial p(x). Þ  A polynomial of degree 1 is called a linear polynomial. For example, 2x – 3, √3x+1,y +√3 Þ  A polynomial of degree 2 is called a quadratic polynomial. The name ‘quadratic’ has been derived from the word ‘quadrate’, which means ‘square’.       2x 2  +  3x + 2 ,y 2  + 2 Þ  Any quadratic polynomial in x is of the form ax 2  + bx + c, where a, b, c are real numbers and a ≠ 0. Þ  A polynomial of degree 3 is called a cubic polynomial e.g. 2 –  x 3 ,  x 3 , √2  x 3 . Þ  General form of a cubic polynomial is  ax 3  + bx 2  + c x +...