Year 8 - Energy

Calculate work: A 100 Newton force is applied to move a 15 kg object a distance of 5 meters?

• 20 Joules
• 75 Joules
• 500 Joules
• 1500 J

A force exerted over a distance to move an object is ______________________.

• power
• work
• momentum
• Watt

A 5000N block is lifted 10 m. How much work was done?

• 50000 J
• 5000 J
• 500 J
• 50 J

A ______ is a simple machine.

• Lever arm

• Lever

• Fulcrum

• Load

How does a single fixed pulley, like the one seen here, help you do work?

• changes the direction of the force
• increases the amount of applied force
• decreases the amount of applied force
• allows you to pull the rope a shorter distance

A(n) _____________ is a device for measuring temperature.

• thermometer
• barometer
• anemometer
• psychrometer 

Why does a cup of water become colder when ice is added?

• Heat flows from the water to the ice
• Heat flows from the ice to the water
• Cold flows from the ice to the water
• Cold flows from the water to the ice

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What type of energy is transferred between a cold and warm block?

• thermal energy
• chemical energy
• electrical energy
• mechanical energy

Temperature is the same thing as heat.

• TRUE
• FALSE

The kind of heat transfer that travels through space in electromagnetic waves is ______________________.

• insulation.
• Radiation
• Conduction
• Convection

Tags

NGSS.HS-PS4-3