Class 10 Olympiads — Class 10 Science Olympiad - Sample papers

Sources of energy: Q1) The diagram shows a simple calorimeter system for measuring the heat given out by a liquid fuel burner. The experiment data for four fuels A,B, C and D is given below. 100 ml (100g) of water was used in the calorimeter to 'collect' the heat given out. The mass of fuel burned and the temperature rise of the water are given. From the data which fuel is the LEAST efficient in terms of energy released per unit mass?

Life processes: Q1) Select the correct option which is related to the movement of food through esophagus Q2) Diaphragm changes its shapes in the process of respiration. Select the correct situation in normal expiration Q3) Select the correct pathway of blood in circulatory system from the options below

Reproduction in Organisms: Q1) A Planaria worm is cut horizontally in the middle into two halves P and Q such that the part P contains the whole head of the worm. Another Planaria worm is cut vertically into two halves R and S in such a way that both the cut pieces R and S contain half head each. Which of the cut pieces of the two Planaria worms could regenerate to form the complete respective worms?

Digestive system: Q1) To prepare for fat digestion by specific enzymes, the breakdown of large fat globules into smaller uniformaly distibuted particles is called as ____. Q2) Which of the following statements about digestion is true?

Excretory system: Q1) This blood vessel delivers blood directly to the glomerulus for filtration. Identify it Q2) Which of the following correctly traces the path of urine as it is formed within the kidneys?

Heredity and evolution: Q1) A cross between a tall plant (TT) and short plant (tt) resulted in progeny that were all tall plants because _____. Q2) Which kind of organs present in two organisms indicates that they are derived from the same ancestor? Q3) The pair of organ which is not homologous in the following are _____.

Magnetic effects of electric current: Q1) A soft iron bar is introduced inside a current carrying solenoid. The magnetic field inside the solenoid will _______. Q2) Which of the following diagrams correctly shows the magnetic field produced by a current carrying wire?

Acids, bases, and salts: Q1) Which of the following phenomena occur, when a small amount of acid is added to water? i. Ionisation, ii. Neutralisation, iii. Dilution, iv. Salt formation Q2) Identify the correct representation of reaction occurring during chloralkali process.

Circulatory system: Q1) The difference between systolic and diastolic pressure is ______. Q2) The diagram shows double circulation in four chambered heart. Which of the following organisms have a four chambered heart?

Periodic classification of elements: Q1) Given below are the melting points and atomic radii of four elements P, Q, R, and S each having n electrons in their outermost shell of atoms. Which element will have the highest atomic number?

Human eye: Q1) A glass prism is immersed in water. What happens to the value of the angle of minimum deviation to its value in air? Q2) A short sighted person cannot see beyond 2 m. Calculate the power of lens required to correct his vision.

Respiratory system: Q1) When one molecule of glucose is completely oxidized, it changes ______. Q2) The usefulness of fermentation as a source for deriving energy is limited because ____.