Science Practice Quiz 189

Q1.An adult human being normally passes approximately how much urine in 24 hours?

A. 0.5 – 1.0 L B. 1.0 – 1.8 L C. 2.0 – 2.5 L D. 2.5 – 3.0 L

Q2.What is the approximate percentage composition of water in human urine?

A. 2.5% B. 50% C. 75% D. 95%

Q3.What causes the white patches sometimes formed on clothes, especially in areas like underarms, after sweating?

A. Dirt and dust accumulation B. Salts present in the sweat C. Pigments from the clothes D. Bacteria from the skin

Q4.Which of the following waste chemicals do aquatic animals like fishes excrete?

A. Urea B. Uric acid C. Ammonia D. Creatinine

Q5.What is the semi-solid, white coloured compound excreted by land animals like birds, lizards, and snakes?

A. Urea B. Ammonia C. Uric acid D. Guanine

Q6.How does an earthen pot (matka) keep water cooler, a principle also related to sweat's function?

A. By absorbing heat from the water B. By preventing air circulation C. By evaporation of water from its pores D. By chemical reaction with the pot material

Q7.What is the primary function of sweating in the human body?

A. To provide energy B. To remove excess food C. To cool our body D. To absorb nutrients

Q8.What do plants primarily absorb from the soil through their roots?

A. Carbon dioxide and oxygen B. Sunlight and heat C. Water and mineral nutrients D. Prepared food and glucose

Q9.Which part of the plant is responsible for preparing food using water and carbon dioxide during photosynthesis?

A. Roots B. Stems C. Flowers D. Leaves

Q10.What is the main function of root hair in plants?

A. To provide structural support to the plant B. To increase the surface area for the absorption of water and mineral nutrients C. To protect the root from pests D. To store excess food for the plant

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Science Practice Quiz 189