G5-Q4-SCIENCE5-STARS

What is a star?

• A cold ball of glowing gases

• A hot ball of glowing gases

• A solid rock in space

• A type of planet

What is the force that acts on particles and dust in an area of space to form a star?

• Magnetism

• Heat

• Gravity

• Light

What can stars be used for in terms of direction finding?

• They have no use in navigation

• They can tell the time of day

• They can point to the location of Earth's north

• They are used for communication with other planets

How is a star born?

• In a high-density cloud of dust and gas

• From a collision of planets

• In a low-density cloud of dust and gas called a nebula

• Through a volcanic eruption

What process occurs when hydrogen atoms fuse to become helium in a star?

• Nuclear fission
  

• Nuclear fusion

• Chemical combustion

• Radioactive decay

What is produced by the fusion in a star that reaches the surface?

• Water

• Heat

• Light

• Sound

What happens when the hydrogen in the core of a star is used up?

• The star disappears

• The core expands

• The core collapses

• The star becomes a planet

What causes the outside of a star to swell as the core collapses?

• Decreased temperature

• Increased pressure

• Faster rotation

• Nuclear fission

Which color of stars are the coolest?

• Blue

• White

• Yellow

• Red

Which star classification is known as the hottest?

• G stars

• M stars

• O stars

• A stars