Inv5.Exp2 Text B

What is the primary function of a geodynamo in Earth's structure?

• To regulate Earth's temperature
• To generate Earth's magnetic field through convection currents
• To maintain the solid state of the inner core
• To separate the inner and outer core

Which statement best describes the relationship between electric charge and electromagnetic fields?

• Electric charge creates gravitational fields
• Electric charge has no interaction with electromagnetic fields
• Electric charge experiences a force in electromagnetic fields
• Electric charge neutralizes electromagnetic fields

The outer core of the Earth is characterized by:

• Solid iron and nickel composition
• Gaseous state of matter
• Location between the crust and mantle
• Liquid iron-nickel composition between inner core and mantle

What is the primary purpose of a scientific model?

• To make scientific concepts more complicated
• To represent something difficult to observe directly
• To replace real-world observations
• To create artistic interpretations of data

Which description accurately defines electrons?

• Positively charged particles in the nucleus
• Neutral particles with no charge
• Negatively charged subatomic particles
• Particles that only exist in free state

In the context of scientific measurements, magnitude refers to:

• The direction of a force
• The speed of a reaction
• The distance or quantity of something
• The time elapsed during an event

What is the key characteristic of perpendicular lines?

• They are parallel to each other
• They meet at a 45-degree angle
• They meet at a 90-degree angle
• They never intersect

Which statement best describes proportional relationships?

• Two variables with equivalent ratios
• Two variables that are always equal
• Two variables that decrease together
• Two variables with no relationship

What is the primary function of a battery?

• To store mechanical energy
• To convert electrical energy to chemical energy
• To convert chemical energy to electrical energy
• To generate nuclear energy

Iron is classified as:

• A non-metal in group 7
• A transition metal in group 8
• A noble gas in group 18
• An alkali metal in group 1