Natural Sciences 9 - 2025
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Complete the table below, as follows:
- In the second column, write in the symbol that we use for each quantity in the first column.
- In the third column, write the name of the SI unit that we use for the quantity in the first column.
- In the fourth column, from the drop-down list, select the correct symbol for the SI unit.
Note: You need to be precise in your answers. Pay attention to upper and lower case.
| Quantity | Symbol of quantity | Name of SI unit | Symbol of SI unit |
|---|---|---|---|
| Resistance | |||
| Current | |||
| Voltage |
Identify the magnetic poles in the diagram
Which of the following will be attracted by a magnet
Name the forces in the following pictures
Classify the following forces:
DESCRIPTION | Contact force / non-contact force | Specific force, e.g. friction force |
A ball is thrown into the air and falls back to Earth. | 3.1 | 3.2 |
An object is pulled. | 3.3 | 3.4 |
The force that acts against a force pulling an object along a rough surface. | 3.5 | 3.6 |
An iron nail is attracted by a magnet. | 3.7 | 3.8 |
A mass hangs from a rope. | 3.9 | 3.10 |
A positive and negative charge attract each other. | 3.11 | 3.12 |
Two negative charges repel each other. | 3.13 | 3.14 |
A nail is hit into a wall. | 3.15 | 3.16 |
A mass is attached to a scale. | 3.17 | 3.18 |
The north poles of two magnets repel each other. | 3.19 | 3.20 |
A rubber band that is stretched. | 3.21 | 3.22 |
A sponge that is squeezed dry. | 3.23 | 3.24 |
What is lightning?
Which kind of particle carries a negative charge?
Why do negatively charged electrons in the bottom of the cloud travel to protons in the ground?
What is thunder?
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