Evaluation Test (Grade-7)

What is an example of a third-class lever?

• broom

• screwdriver

• screw

• wheelbarrow

What kind of simple machine is a wheelchair ramp?

• pulley

• wheel and axle

• inclined planes

• wedge

What is a simple machine?

• a device that has only one working motor

• device that is made up of two or more machine

• a device that makes work easier

• a device that makes more work for a job

What type of charge does a proton have?

• postive

• no charge/neutral

• negative

• all of above

What two sub-atomic particles belong in the nucleus of an atom?

• electrons and neutrons

• electrons and protons

• protons and neutrons

The mass number of an atom is calculated as

• protons + neutrons

• protons - neutrons

• electrons - neutrons

• neutrons + electrons

What is chemical name of baking soda?

(a)  

Name the chemical gas that has formula CH_4.

(a)  

Select which of below are correct saying.

• All Matters have mass.

• All Matters have fixed volume.

• All matters have fixed mass but not fixed volume.

• All matters occupy space.

Which of below is not a simple machine?

• Screw driver

• winding roads

• A string roller

• Bicycle