Chapter Exam

Chapter-8 A Journey through States of Water — Online MCQ Test

Q: What is the process by which water changes from liquid to gas?

Answer: B. Evaporation — Evaporation is the process where liquid water turns into water vapor or gas when heated.

Q: Which of the following is NOT a state of matter for water?

Answer: D. Plasma — Water exists in three states: solid (ice), liquid (water), and gas (water vapor). Plasma is not a common state of water under normal conditions.

SCIENCE · Grade 6 · CBSE(NCERT)

Practice Chapter-8 A Journey through States of Water with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 6 SCIENCE. This chapter covers: evaporation - condensation - water cycle - states of water. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter-8 A Journey through States of Water — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 6 SCIENCE — Chapter-8 A Journey through States of Water, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the process by which water changes from liquid to gas?

A. Condensation
B. Evaporation ✓
C. Freezing
D. Melting

Answer: B. Evaporation
Evaporation is the process where liquid water turns into water vapor or gas when heated.

Which of the following is NOT a state of matter for water?

A. Solid
B. Liquid
C. Gas
D. Plasma ✓

Answer: D. Plasma
Water exists in three states: solid (ice), liquid (water), and gas (water vapor). Plasma is not a common state of water under normal conditions.

Why does water evaporate faster on a hot, sunny day compared to a cold, cloudy day?

A. Heat energy increases the kinetic energy of water molecules ✓
B. Clouds prevent evaporation completely
C. Cold water cannot evaporate
D. Sunlight removes water from the atmosphere

Answer: A. Heat energy increases the kinetic energy of water molecules
Higher temperatures provide more heat energy, allowing water molecules to move faster and escape as vapor more readily.

How are condensation and evaporation related in the water cycle?

A. They are the same process
B. They are opposite processes that work together in the cycle ✓
C. Condensation causes evaporation
D. They only occur over oceans

Answer: B. They are opposite processes that work together in the cycle
Evaporation converts liquid to gas while condensation converts gas back to liquid; together they drive the water cycle.

A beaker of water is kept in a sealed room for several days. Initially, the water level decreases, but then remains constant. What is the most reasonable explanation?

A. Water stops evaporating after a few days
B. Evaporation and condensation reach equilibrium in the sealed environment ✓
C. The water transforms into a different state
D. The container becomes impermeable to water vapor

Answer: B. Evaporation and condensation reach equilibrium in the sealed environment
In a sealed room, water continues to evaporate but also condenses back, eventually reaching equilibrium where evaporation equals condensation.

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