physics for Grade 9 (Agial ) Dr Ahmed Saad

What are the steps of the scientific method?

• 1) Observation, 2) Question, 3) Hypothesis, 4) Experiment, 5) Analysis, 6) Conclusion, 7) Communication.

• 1) Observation, 2) Theory, 3) Experiment, 4) Conclusion

• 1) Hypothesis, 2) Data Collection, 3) Conclusion, 4) Communication

• 1) Question, 2) Analysis, 3) Experiment, 4) Observation

Define the SI base unit for mass.

• pound

• kilogram

• gram

• ounce

How do you convert 5 kilometers to meters?

• 5,000 kilometers

• 50 kilometers

• 5000 meters

• 500 meters

What is the difference between precision and accuracy?

• Accuracy is about consistency; precision is about the average value.

• Precision is about consistency; accuracy is about closeness to the true value.

• Precision measures the average; accuracy measures the range.

• Precision is the same as accuracy; both refer to correctness.

How many significant figures are in the number 0.00456?

• 2

• 4

• 5

• 3

What is the SI base unit for temperature?

• Kelvin

• Fahrenheit

• Rankine

• Celsius

Convert 2500 milliliters to liters.

• 2.5 liters

• 250 liters

• 3.0 liters

• 1.5 liters

Explain why precision is important in scientific measurements.

• Precision is important in scientific measurements because it ensures consistency, reliability, and accuracy in results.

• Precision is only important for qualitative measurements.

• Precision is only necessary in theoretical calculations.

• Precision is irrelevant if the measurements are accurate.

How many significant figures are in the number 100.0?

• 2

• 3

• 4

• 5

What is the SI base unit for length?

• meter

• centimeter

• kilometer

• millimeter