Science

Objects of different masses are suspended from a height. Which combination of features will have the greatest gravitational potential energy?

• Low mass and low height
• Low mass and high height
• High mass and high height
• High mass and low height

Tags

NGSS.MS-PS3-2

Which statement most accurately describes the Law of Conservation of Energy?

• Energy can not be created or destroyed but it can change from one type to another.
• Energy is created from the Earth and is destroyed when we use it.
• Energy should be saved (conserved) for use in the future.
• All forms of energy can be classified as either potential or kinetic.

Tags

NGSS.MS-PS3-5

The efficiency of an average gasoline powered car is about 20%. This means,

• The gas tank needs to be 20% filled with gasoline for motion.
• The car uses 80% of the energy stored in the gasoline for motion.
• The car uses 20% of the energy stored in the gasoline for motion.
• The car wastes 20% of the energy stored in the gasoline.

Tags

NGSS.MS-PS3-5

What energy transformation takes place when a radio is plugged in and turned on?

• Kinetic to potential
• Electrical to sound
• Wire to radio waves
• Battery to motion

When you open the door to a refrigerator for a minute, what happens?

• Thermal energy in the refrigerator is transferred to the air outside the refrigerator.
• Thermal energy in the air outside the refrigerator is transferred to the inside of the refrigerator.
• The temperature of the air inside the refrigerator decreases.
• The temperature of the air just outside the refrigerator increases.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which units are used for measuring energy?

• pounds
• meters
• degrees Celsius
• calories

Which list consists of only renewable energy sources?

• solar, nuclear, coal, wind
• wind, solar, hydro, tidal
• nuclear, petroleum, wind, hydro
• petroleum, tidal, solar, biomass

Cory noticed that the hood of the car was hot after driving it for a while. What energy transformation was she noticing?

• chemical energy ➞ thermal energy
• thermal energy ➞ motion (kinetic)
• temperature energy ➞ braking energy
• motion (kinetic) ➞ thermal energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The following methods will melt an ice cube quickly, except

• hold it in your hand and change hands when one hand gets cold
• put it in a glass of room temperature water
• put it in an insulating container
• break it into pieces and warm up the pieces

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Jose had a 200 mL cup of hot chocolate that was 95° Celsius which was too hot to drink. His mother suggested he add some cold milk to cool it off so he added 50 mL of milk which was 5° Celsius. What was the approximate
temperature of Jose’s hot chocolate?

• 95° Celsius
• 75° Celsius
• 25° Celsius
• 5° Celsius

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4