Eighteen Point Two

For condensation to occur, air must be _____.

Tags

NGSS.MS-ESS2-4

NGSS.MS-ESS2-5

True or False: The magnetic field produced by an electric current in a wire can move a compass needle

• True

• False

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What 2 devices make the magnetic field stronger? These devices make electromagnetism more useful.

• wires & movement

• water & gravity

• selonoid & electromagnet

• battery & plug

Tags

NGSS.MS-PS2-3

A coil of wire that produces a magnetic field when an electric current runs through it is called a.

• generator

• transmission

• cultivator

• solenoid

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

The magnetic field of a solenoid gets stronger if it has

• less loops of wire

• more loops of wire

• more heaps of sunshine

• more batteries

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

An electric motor that uses direct current contains a device called a___. It is a ring that is split in half and connected to the ends of the armature

• Cummutator

• Alternator

• Radiator

• Suspension

Which of the following statements about ocean thermal energy conversion (OTEC) is false? 

• OTEC uses boiling sea water to generate steam, which spins a turbine that powers an electric generator. 

• OTEC has been proven to generate electrical energy efficiently. 

• The environmental effects of OTEC are unknown. 

Tags

NGSS.HS-ESS3-2

NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

Which of the following describes a limitation of hydrogen as a fuel source?

• Hydrogen is an uncommon element. 

• The production of hydrogen fuel requires a lot of energy. 

•  The production of hydrogen fuel results in a lot of air pollution. 

• Hydrogen fuel cannot be stored efficiently.

What feature is visible in the images of our galaxy when observed with different wavelengths of electromagnetic radiation?

• Different features of the galaxy are visible at different wavelengths

• The same features of the galaxy are visible at all wavelengths

• No features of the galaxy are visible at any wavelengths

• Only the Earth's features are visible at different wavelengths

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

NGSS.HS-PS4-4

What is the atomic number of Argon?

• 16

• 18

• 20

• 22