The outer planets also have _____________ compared to the inner planets.

Amaya learns that the universe is a mysterious and complex collection of objects while reading Carl Sagan’s book, Cosmos. She arranges the objects in the universe by size to better understand the vastness of the universe. Rearrange the hierarchy of the universe into the correct order. Place the smallest object on the left and the largest on the right.

Ethan visited the Crosby Observatory at the Orlando Science Center. The observatory houses the largest refracting telescope available to the public in Florida. One night, he observed several stars that all seemed to be equally bright. However, one of the astronomers explained that each star actually had a different absolute brightness. What information do you need to calculate a star's absolute brightness? Choose the two that apply.

People are fascinated with the possibility of life on other planets. When looking for signs of life on other planets, scientists often look for planets that have similarities to Earth. According to the chart, which planet has a rotation most similar to Earth’s?

Lin and Alex are discussing the two theories about the future of the universe.

Alex was confused about what happens when massive stars die. Lin explains that sometimes after a star dies, the gravity of the remaining mass can be so strong that it pulls the gases inward, packing it into a smaller and smaller space. What is this called?

The four inner planets in our solar system are closer to the sun and share some similarities. How do the inner planets in our solar system compare to the outer planets? Choose the two that apply.

A galaxy is made up of gas, dust, and many stars. What do all stars have in common?

Since ancient times, people have been fascinated with the night sky. The night sky came alive with bright objects that hinted at other worlds, but they were difficult to study with the naked eye. What instrument did scientists invent to study the different objects in the night sky?

Scientists believe the solar system formed about 4.6 billion years ago. It started as a cloud of gases, ice, rock, and other materials. Everything in the solar system, including the sun and planets, were formed when ___________________ began to pull together materials in the cloud.

The sun has an important role in our solar system. Which of the following statements are true about the sun? Choose all the statements that apply.

A group of stars that forms a pattern

A rocky mass orbiting the Sun that can be several hundred kilometers wide is called ___________________.

List the order of the planets, starting from the sun.

If you used a golf ball, baseball and a basketball to represent the Earth, Mercury and the Sun. Which ball would represent each planet?