CBSE Class 7 Science The Ever-Evolving World of Science (Class 7 NCERT New) Quiz 6

1. Which change is irreversible in everyday life?

A Glacier ice melting in summer B Butter softening in a warm pan C Ice melting into liquid water D Burning paper into ash and smoke

2. Heat speeds up many changes. Which example best shows heat flowing from a warmer object to a cooler one?

A Ice melting faster in your hand B Rain soaking through the soil C Clouds forming high in the sky D Groundwater moving toward rivers

3. Which sequence shows deposition correctly in the particle-level changes diagram?

A Gas directly to solid B Solid directly to liquid C Liquid directly to gas D Gas to liquid to solid

4. How many seconds are in one minute?

A 45 seconds make a minute B 90 seconds make a minute C 30 seconds make a minute D 60 seconds make a minute

5. Which statement describes one hour correctly?

A 60 minutes equal an hour B 90 minutes equal an hour C 30 minutes equal an hour D 45 minutes equal an hour

6. During a solar eclipse, how are the Sun, Moon, and Earth aligned?

A Earth–Moon–Sun in a curved line B Sun–Moon–Earth in a straight line C Sun–Earth–Moon in a straight line D Moon–Sun–Earth in a straight line

7. What causes the shadow seen on Earth during a solar eclipse?

A The Sun stops producing any light B The Earth blocks sunlight reaching Moon C The Moon blocks sunlight reaching Earth D Clouds cover the Sun completely

8. Which observation would best help you decide whether an eclipse is solar or lunar?

A Whether tides are higher than normal B Whether the Sun appears larger at noon C Whether the Moon’s shadow falls on Earth D Whether Earth’s shadow falls on the Moon

9. Studying light and shadows helped people understand day, night, and __________.

A the colors of favorite animals B the names of new constellations C the taste of different foods D the seasons and yearly patterns

10. What is the name of the chapter?

A Amazing Biology B The Ever-Evolving World of Science C Science and Nature D World of Physics