A car moved from town A to town B which are 45 km apart in 1 hour. At what speed was the car moving? Give the answer in SI unit.

Distance ($d$) = $45 \text{ km}$
Time ($t$) = $1 \text{ hour}$

$1 \text{ km} = 1000 \text{ m}$

$1 \text{ hour} = 60 \text{ minutes}$
$1 \text{ minute} = 60 \text{ seconds}$

The speed of the car in SI units is $\boxed{\text{12.5 m/s}}$.

20. Differentiate between each of the following pairs of scientific skills.

a) Prediction and conclusion

• A prediction is an educated guess about a future event or the outcome of an experiment, based on prior knowledge or observations. A conclusion is a summary of the results of an experiment or investigation, stating whether the initial hypothesis was supported or rejected.

b) Manipulative and communication

• Manipulative skills involve the ability to handle scientific equipment, materials, and tools safely and effectively during experiments or investigations. Communication skills refer to the ability to clearly and effectively share scientific information, data, results, and ideas with others, both verbally and in writing.