Final Exam 8th Science

Front

What are microwaves used for?

Back

Microwaves are electromagnetic waves used in ovens and cell phone communications.

Front

Where is the best place to put a telescope for clear images of deep space?

Back

In space.

Front

What is the relationship between wavelength and frequency?

Back

The longer the wavelength, the lower the frequency.

Front

What is a medium in the context of waves?

Back

The material through which a wave travels.

Front

What type of galaxy is characterized by spiral arms?

Back

Spiral galaxy.

Front

Define frequency in terms of waves.

Back

Frequency is the number of waves that pass a point in a given time period.

Front

What is the speed of light in a vacuum?

Back

Approximately 299,792 kilometers per second.

Front

What is the difference between a reflection and a refraction of light?

Back

Reflection is the bouncing back of light when it hits a surface, while refraction is the bending of light as it passes from one medium to another.

Front

What are the three main types of galaxies?

Back

Spiral, elliptical, and irregular.

Front

What is the electromagnetic spectrum?

Back

The range of all types of electromagnetic radiation, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.