Science 7 Unit 6 Exam Review:

According to the model developed by Copernicus, what causes day and night on Earth?

Earth rotates on its axis.

A rover is a craft designed to land on the surface of a body in space.

FALSE

A galaxy contains stars, gas, and dust. This matter must be held together or the galaxy will break apart. What is responsible for holding the stars, gas, and dust together in a galaxy?

Gravity

Sometimes the moon looks like a crescent. At other times, the moon looks like a half circle. What makes it possible for you to see the surface of the moon from Earth?

Light from the sun is reflected by the moon's surface.

An orbit is the path that a body follows as it travels around another body.

TRUE

Astronomers use cameras on Earth and in orbit to observe the solar system and other objects in space. Suppose that a camera on Earth takes a picture of a large, dark, round object in the sky. Which event is most likely taking place?

a lunar eclipse

A satellite took x-ray pictures of a solar flare. How did the solar flare most likely appear on the x-ray pictures?

as an area of bright white light

Radar sensors on high-altitude aircraft and on space platforms such as the space shuttle have been used to produce three-dimensional maps of Earth's surface. These radar sensors use electromagnetic wavelengths that have the lowest energy. What type of electromagnetic radiation do these radar sensors use?

radio waves

Cassie is writing an equation to show the effect of the gravitational pull of the sun and the moon on tidal range. Which equation would Cassie use to show the effect of the sun and the moon on spring tides?

sun + moon = spring tides

Luis created a clay model of Earth. To show how Earth rotates, Luis wants to use a toothpick to represent Earth's axis of rotation. Where should Luis place the toothpick?

vertically through the center of Earth, slightly to the side of each pole