Science Review

At the Energy Park, Francis, a fifth-grade student, played and observed various movements around him. First, he noticed a bird flying in the sky, and then he saw an old man jogging along a straight path. What types of motion did he observe in the park?

• Rolling motion

• Periodic motion

• Circular motion

• Rectilinear motion

Jane is standing on a moving escalator in a shopping mall. Which of the following statements best describes Jane’s motion relative to the ground when they are standing still on the escalator?

• Jane is not moving relative to the ground.

• Jane is not moving relative to the ground.

• Jane is moving relative to the ground in the same direction as the escalator.

• Jane is moving relative to the ground in the opposite direction of the escalator.

Which of the following demonstrates an example of periodic motion?

• A bird flying in the sky.

• A ball rolling down a hill.

• A car driving on a straight road.

• Pendulum swinging back and forth.

Rolly runs with an average speed of 2m/s. What does it mean?

• He runs 4 meters in 2 seconds.

• He runs 2 kilometers in one hour.

• In 1 second, he runs a distance of 1 meter.

• In 4 seconds, he runs a distance of 1 meter.

A school bus travels at an average speed of 4 meters per second (mps). If it takes 6 seconds for the bus to arrive at school, how far does it travel?

• 16 meters

• 20 meters

• 24 meters

• 28 meters

Why is using standard units of measure important in travel and navigation?

• Provide wrong and reliable information in everyday life.

• Help us easily share directions and distances.

• Cause confusion and misunderstanding with different measurements.

• Allow mistakes in converting and comparing different measurements.

What is needed to calculate the speed of a moving object?

• Velocity and time

• Distance and time

• Force and distance

• Acceleration and mass

When objects absorb light, the energy from the light is taken in and turned into heat, which changes the object's temperature. What happens to the temperature?

• Bend

• Fall

• Rise

• Stop

Which situation supports the idea of color absorption of light and heat?

• A black car becomes hotter in the sun than a white car.

• A glass of water heats up faster than a metal container.

• A mirror reflects most of the sunlight that hits it.

• Workers wear green pants at the site.

What is the scientific term for the bouncing off light?

• Absorption

• Refraction

• Reflection

• Transmission