Model quiz

Anything that has mass and acquires space is

• mass

• volume

• matter

• sky

Electron was discovered by

(a)  

Metals are good conductors of electricity because

• they contain free electrons
• the atoms are lightly packed 
• they have high melting point
• all of the above

Stars appears to move from east to west because

• All stars move from east to west
• The earth rotates from west to east
• The earth rotates from east to west
• The background of the stars moves from west to east

Light year is a unit of

• Time
• Distance
• Light
• Intensity of light