Grade 9 NATURAL SCIENCE Revision (Term 3) Questions with Verified Answers |
Guaranteed Success
What is a simple device that opens and closes a circuit? switch
TRUE or FALSE
As a ball rolls along the ground it starts to slow down and stops after a period of time as this is
caused by friction. true
What is the difference between a series circuit and a parallel circuit? A series circuit has one
path; and a parallel circuit splits into two branches.
TRUE or FALSE
If you squeeze an inflated balloon softly between your hands, you will notice that it will get
bigger. false
Electricity generation by falling water is called: Hydroelectricity
TRUE or FALSE
Compression is a contact force that pushes or squeezes an object into a smaller space. true
What the correct scientific term for a non-contact force? The force which acts on an object
but does not physically come into contact with it.
TRUE or FALSE
A fuse is a device that has a thin strip of metal that will melt and break if the current exceeds a
safe level. true
What is the correct scientific term for a safety device in a circuit that melts and breaks if the
current exceeds a safe level? a fuse
, TRUE or FALSE
When connecting cells in series we connect two negative terminals of one cell. false
What is the correct scientific term for the flow of electric charge in a circuit? an electric
current
The more cells that you connect, the (greater/lesser) than the voltage is of the battery.
greater
Best describe how lightning occurs: Lightning is the build up of condensation and friction in
between the clouds and creates a surge of electrostatic energy.
A circuit that has only one pathway for the current to flow is called a ________ circuit .
series
TRUE or FALSE
We are able to measure the amps of a resistor by using a volt meter. false
Current is measure in (ohms/amperes) . amperes
TRUE or FALSE
Resistance is measured in ohms. true
A stationary object such as a car, will be able to move if enough people exert enough force by
(twisting/pushing) it. pushing
TRUE or FALSE
Guaranteed Success
What is a simple device that opens and closes a circuit? switch
TRUE or FALSE
As a ball rolls along the ground it starts to slow down and stops after a period of time as this is
caused by friction. true
What is the difference between a series circuit and a parallel circuit? A series circuit has one
path; and a parallel circuit splits into two branches.
TRUE or FALSE
If you squeeze an inflated balloon softly between your hands, you will notice that it will get
bigger. false
Electricity generation by falling water is called: Hydroelectricity
TRUE or FALSE
Compression is a contact force that pushes or squeezes an object into a smaller space. true
What the correct scientific term for a non-contact force? The force which acts on an object
but does not physically come into contact with it.
TRUE or FALSE
A fuse is a device that has a thin strip of metal that will melt and break if the current exceeds a
safe level. true
What is the correct scientific term for a safety device in a circuit that melts and breaks if the
current exceeds a safe level? a fuse
, TRUE or FALSE
When connecting cells in series we connect two negative terminals of one cell. false
What is the correct scientific term for the flow of electric charge in a circuit? an electric
current
The more cells that you connect, the (greater/lesser) than the voltage is of the battery.
greater
Best describe how lightning occurs: Lightning is the build up of condensation and friction in
between the clouds and creates a surge of electrostatic energy.
A circuit that has only one pathway for the current to flow is called a ________ circuit .
series
TRUE or FALSE
We are able to measure the amps of a resistor by using a volt meter. false
Current is measure in (ohms/amperes) . amperes
TRUE or FALSE
Resistance is measured in ohms. true
A stationary object such as a car, will be able to move if enough people exert enough force by
(twisting/pushing) it. pushing
TRUE or FALSE
