CLASS-7 SCIENCE L-3 DIAGNOSTIC TEST

What happens to particles in a solid when it is heated?

• They stop moving

• They move slower

• They start vibrating more

• They disappear

Match the state with its particle arrangement.

• Solid

• Tightly packed

• Gas

• Very loosely packed

• Liquid

• Loosely packed

Energy is the ability to do _______.

Which option shows correct comparison?

• Energy is same as temperature

• Temperature measures how hot something is

• Temperature is energy

• Energy is measured in degrees

Which materials are good conductors of electricity?

• Copper

• Plastic

• Aluminium

• Wood

What is a common property of metals like copper and aluminium?

• They are insulators

• They transfer heat and electricity

• They melt easily

• They are non-reactive

When water is heated, what happens to it?

• It turns into a gas

• It becomes colder

• It turns into a solid

• Nothing changes

Put these events in order when heating ice:

• 1

• Water gets warm

• 2

• Ice melts

• 3

• Water evaporates

What is the SI unit of temperature?

• Joule

• Kelvin

• Degree

• Celsius

The SI unit of heat is _______.