WorksheetsGrade 9 Topics
Total questions: 10
Worksheet time: 5mins
What happens when a solid is heated and expands?
The molecules do not change size and the spaces between the molecules become larger.
The molecules expand and the spaces between the molecules become larger.
The molecules expand and the spaces between the molecules become smaller.
The molecules expand and the spaces between the molecules do not change size.
The diagram shows two divergent rays of light from an object O being reflected from a plane mirror.
At which position is the image formed?
A
B
C
D
Which statement is correct?
Total internal reflection only occurs when light travels from air into glass.
The larger the refractive index of glass, the larger is the critical angle.
When total internal reflection occurs, the angle of incidence is equal to the angle of reflection.
When total internal reflection occurs, the angle of incidence is less than the critical angle.
A young person with healthy ears can hear a range of frequencies.
What is the approximate range of frequencies?
2 Hz to 2000 Hz only
2 Hz to 20 000 Hz only
20 Hz to 2000 Hz only
20 Hz to 20 000 Hz only
An electric current in a wire is into the page.
Which diagram shows the shape and direction of the magnetic field around the wire?
A
B
C
D
A copper wire X has resistance R. Another copper wire Y has twice the length and half the cross- sectional area of X.
What is the resistance of Y?
R/2
R
2R
4R
An electrical appliance is plugged into a socket in the wall. The plug contains a fuse. What is the main purpose of the fuse?
to earth the appliance
to earth the plug
to protect the user from electric shock
to protect the wiring from overheating
The diagram shows a set of apparatus used to determine the specific heat capacity of water.
What does not affect the rate at which energy is lost to the surroundings?
insulating the container
placing a lid on the container
polishing the outer surface of the container
moving the thermometer closer to the heater
Two thermometers X and Y contain different liquids but are otherwise identical.
The thermometers are heated through the same temperature rise. The volume of liquid in thermometer X increases by more than the volume of liquid in thermometer Y.
Which is the more sensitive thermometer and which is the thermometer with the larger range?
A
B
C
D
The diagram shows air trapped in a flask by a small volume of water in a thin tube.
When the flask is held in a student’s hands, the small volume of water first moves down from P to Q, and then up to R.
Why does the small volume of water move like this?
The flask contracts and then the air expands.
The flask expands and then the air contracts.
The flask expands and then the air expands less than the flask.
The flask expands and then the air expands more than the flask.
