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- 1. Multiple Choice
What is an example of a third-class lever?
broom
screwdriver
screw
wheelbarrow
- 2. Multiple Choice
What kind of simple machine is a wheelchair ramp?
pulley
wheel and axle
inclined planes
wedge
- 3. Multiple Choice
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
- 4. Multiple Choice
What type of charge does a proton have?
postive
no charge/neutral
negative
all of above
- 5. Multiple Choice
What two sub-atomic particles belong in the nucleus of an atom?
electrons and neutrons
electrons and protons
protons and neutrons
- 6. Multiple Choice
The mass number of an atom is calculated as
protons + neutrons
protons - neutrons
electrons - neutrons
neutrons + electrons
- 7. Fill in the Blank
What is chemical name of baking soda?
- 8. Fill in the Blank
Name the chemical gas that has formula CH4.
- 9. Multiple Choice
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.
- 10. Multiple Choice
Which of below is not a simple machine?
Screw driver
winding roads
A string roller
Bicycle
- 11. Multiple Choice
An element can be split into further smaller part.
True
False
- 12. Multiple Choice
The symbol of Boron is B.
True
False
- 13. Multiple Choice
A steel cutting scissors has longer handles and shorter blade edge.
True
False
- 14. Multiple Choice
The combining capacity of one atom to another while chemical combination is called compound.
True
False
- 15. Fill in the Blank
The symbol for Magnesium element is ............
- 16. Fill in the Blank
The formula to show principle of lever is...............
- 17. Open Ended
What do you mean by lever? Mention its types with one example of each.
- 18. Open Ended
What do you mean by screw? Why wedge is also called double inclined plane?
- 19. Open Ended
Simple machines makes our work efficient, justify with suitable reason.
- 20. Open Ended
Define compound. Why carbondioxide is called a compound?
- 21. Open Ended
Why an atom is electrically neutral? How many neutrons are there in hydrogen atom.
- 22. Open Ended
Write any two difference between physical and chemical change.
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