WorksheetsUnit 7 Study Guide
Total questions: 13
Worksheet time: 9mins
Together, a star and all the planets and other objects orbiting it from a(n)
(a)
A chunk of rock or iron that is less than 1,000km (621 mi) in diameter and that orbits the sun is called a(n)
(a)
A huge ball of very hot, glowing gases in space that can produce its own heat and light is called a(n)
(a)
A group of solar systems that are held together by gravity and classified by shape is called a(n)
(a)
This diagram shows the position of Earth, the moon, and the sun during a
(a)
Scientists use models to represent or explain why things in the natural world. Why are models useful for the study of the solar system?
because models cannot be proved wrong
because models are always accepted by all scientists
because models describe the way things actually are
because models can be used to describe how things work
On a clear night in summer, Mrs. Hanna identifies the constellation Scorpius in the sky. When she went star gazing five months later, she could not find Scorpius, but could see Gemini instead. Why?
The stars in Scorpius moved.
The moon was blocking Scorpius in the sky.
Earth revolved so it was facing a different part of the universe at night.
The moon revolved so it was facing a different part of the universe at night.
During a school field trip to an observatory, George used a telescope to observe stars of different colors. What factor determines a star's color?
size
brightness
temperature
distance from Earth
Ming is doing a project on planets in other solar systems. She learns about a planet called Planet Emma. Planet Emma is very large and has a thick atmosphere and a low density. Which planet is Planet Emma most similar to?
Earth
Mars
Mercury
Saturn
What describes movements of objects in space?
Earth is a satellite of the moon.
The sun revolves around Earth.
Earth and the moon rotate in different directions.
The moon orbits Earth while Earth orbits the sun.
Some elliptical galaxies appear to be perfect spheres. How are the stars distributed within this kind of galaxy?
The stars are evenly distributed throughout the galaxy.
The center is very dense with many stars, and density decreases farther out.
Most of the stars are near the outside of the sphere with dust clouds in the center.
The stars are spread throughout the spherre in bands that look like the arms of spiral galaxies.
All the planets in the solar system orbit the sun. What is the main difference between the orbits of the inner and outer planets?
The inner planets and outer planets orbit in different directions.
The inner planets travel a greater distance than the outer do.
The outer planets take longer to orbit the sun than the inner planets do.
The outer planets rotate as they orbit the sun, and the inner planets do not,
Which of the following is evidence of Earth's rotation?
The stars appear to rotate around the North Star.
The moon appears to change shape each month.
The seasons change throughout the year,
The moon stays in orbit around Earth.
