Fast review mode: answers are shown by default so you can skim quickly. Hide them if you want to self-test.
Use the following information for Questions below.
Light travels at 300,000 km per second in the vacuum of space. The sun produces an enormous amount of energy. Some of that energy reaches Earth in the form of sunlight and affects Earth’s systems.
Join 4M+ learners. Unlock unlimited quizzes, wrong-answer tracking, flashcards + reminders, study guides, and 1-on-1 challenges.