C165 Integrated physical science (SXO1)

1. A student performs a digital simulation of wind forces applied to a skyscraper.
Which type of model is used in this scenario?

• Conceptual
• Physical
• Mathematical
• Computer

2. Which statement is an example of a scientific law?

• During any natural interaction, matter is neither created nor destroyed.
• Atoms are composed of smaller particles called protons, neutrons, and electrons.
• The universe originated from a state of extreme density and temperature.
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3. A researcher is studying how paint color and siding material affect the amount of heat absorbed by the siding on a house. The researcher sets up models of exterior walls using different types of siding and different colors. Each model is built the same and faces the sun at the same angle. The researcher measures the surface temperature of each model at regular intervals.
What is a control variable in this experiment?

• The siding color
• The surface temperature
• The siding material
• The sun-siding angle

4. A chemist conducted an experiment in which they observed a chemical reaction under various temperatures. The chemist used the same substances in the same amounts for each reaction and only varied the heat applied for each reaction. The chemist recorded the duration and primary color of each reaction.
What is the independent variable in this experiment?

• The primary reaction color
• The substances in each reaction
• The amount of each substance
• The amount of heat applied

5. Which question should be explored using a controlled experiment?

• Which type of pesticide is most effective for beetles in the Midwest?
• How do solar flares affect plant growth near the equator?
• Do elephants maintain consistent social roles within herds?
• What is the rate at which the universe is expanding?

6. Which two variables are directly proportional?

• Average resting heart rate and score on an intelligence test
• The volume of gasoline pumped at a gas station and the total cost
• The speed at which a runner races one mile and the total time it takes
• The flow rate of a faucet and the time it takes to fill a jug

7. What is a real-world example of force being applied?

• A fully charged battery enables a flashlight to operate.
• A person lifts a box from the floor onto a table.
• A box slides at a constant speed on a frictionless surface.
• A cup of water freezes after being placed in a freezer.

8. A cart is pushed and starts to accelerate.
What is the change, if any, to the speed and velocity?

• Speed changes, but velocity does not.
• Velocity changes, but speed does not.
• Both velocity and speed change.
• Neither speed nor velocity changes.

9. A vehicle travels at a constant rate of 50 miles per hour down a straight flat road.
What is the change, if any, to the speed and velocity?

• Speed changes, but velocity does not.
• Both velocity and speed change.
• Neither speed nor velocity changes.
• Velocity changes, but speed does not.
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