100 Facts of Science #31-40 2017

__________________ is created by vibrating air.

• Light
• Earth's refraction
• Sound
• Rotation

A planet's _____________________ is like the path, or road, it takes to revolve around the sun.

• orbit
• rotation
• attraction
• sound

________________________ travels in straight lines.

• Light
• The sun
• Sound
• The moon

_______________________  is caused when light bounces off an object. 

• Refraction
• Reflection
• Closed circuit
• Rotation

When light passes from air into water, it bends and this is called______________________.

• rotation
• refraction
  Refraction
• reflection
• orbit
  Attraction

Electricity flows in a ________________ path to form a complete circuit.

• Open
• Closed

An electromagnet is a type of magnet where a magnetic field is produced by a/an __________________.

• rotation
• insulator
• conductor
• electric current

The _____________________ is the center of our solar system.

• Earth
• Moon
• Sun
• Mars

What is shown by the model?  (Click the picture)

• The orbits of the planets around the sun.
• The orbit of the earth around the sun.
• The orbit of the moon around the earth.
• The orbits of the earth and the moon.

Scientists _____________  when they put things into groups based on similar characteristics.

• organize
• classify
• contrast
• observe