Scientists' Tools

A lens is NOT

• a tool that bends light.

• a tool that makes light.

• a tool that scientists use.

• found in glasses.

Light travels naturally

• in wavy lines.

• in swirly lines.

• in circles.

• in straight lines.

Refraction is

• when light travels faster.

• the bending of light as it passes from one material to another.

• when light bounces off of a material.

• the disappearance of light.

A lens is a

• a dark object that reflects light.

• a dark object that refracts light.

• a clear object that reflects light.

• a clear object that refracts light.

Choose all that apply. A telescope is

• a tool used to search objects in space.

• a tool that people use to observe objects that cannot see with their own eyes.

• a tool used to see objects that are close.

• a tool that collects light and focuses it to make an image.

Select two. A refracting telescope

• uses lenses to collect and focus light.

• is useful for studying Betelgeuse.

• has very small lenses.

• is useful for studying objects in space that are bright and not very far away.

Select two. Reflecting telescopes

• were invented by Sir Issac Newton.

• were invented by Edwin Hubble.

• use lenses to gather and focus light.

• use mirrors to gather and focus light.

Select all that apply. A space telescope

• is step back in space exploration.

• is a telescope that works in space.

• is better at seeing farther into space than a telescope on land because it lies outside of Earth's atmosphere.

• has found many new galaxies and nebulas.

A radio telescope

• uses lenses.

• gathers radio waves.

• gathers visible light.

• uses mirrors.