Solar System and Beyond

Across

3. The relationships between the components in a system. See components and system.
5. A group of interacting objects or processes. Every system includes components, interactions, and boundaries. See boundaries, components, and interactions.
6. The stuff that makes up all living and nonliving objects.
7. Rockets, satellites, probes, space stations, and space shuttles that carry various tools and equipment to gather data about space and space objects.
9. An advantage, profit, or gain.
12. Any representation of a system (or its components) used to help one understand and communicate how it works.
13. The extent of a system, separating those components and processes that are part of the system from those that are not. See components and system.
17. phases The different shapes of the Moon visible from Earth.
19. Variation between a measurement and the true value of a quantity.
21. The mean, or average, distance between Earth and the Sun (149,597,870,700 m).
23. Someone who pursues understanding of the natural world by using evidence to answer questions.
24. The substances, materials, and processes that make up a system. See system.
26. The angle of Earth’s axis (approximately 23.5 degrees from perpendicular) relative to Earth’s orbital plane around the Sun.
27. A sequence of events that repeats.
28. Information that supports or refutes a claim.
32. Energy that comes from the sun.
33. When the Moon passes into Earth’s shadow.
34. Any product or process made by engineers and scientists.
35. The change of energy from one type to another, such as from chemical to thermal energy.
39. The amount of gravitational pull between two objects. See gravity.
42. Something that happens in a repeated and predictable way.
43. A scientist who studies objects and events beyond Earth’s atmosphere, such as the movement of stars and planets.

Down

1. The systematic study of the natural world.
2. A unit of mass in the metric system; 1 gram is equal to 1,000 milligrams.
4. When the Moon passes between Earth and the Sun such that the Moon’s shadow causes some places on Earth to experience darkness during daytime.
8. Any description or measurement gathered by the senses or instruments.
10. The movement of energy from one object to another.
11. A star and all of the objects that orbit it.
14. Information gathered from an experiment or observations.
15. A push or a pull.
16. A natural phenomenon that causes objects to be attracted to each other based on each object’s mass and the distance between them.
18. The International System of Units (from Système Internationale d’Unités) established by international agreement. SI units are widely used in science, industry, and medicine.
20. The worldwide measuring system used by scientists. Also known as the International System of Units (SI).
22. The ratio of the size of a real object to the size of a model, map, diagram, or other representation of that object. Can also be used to refer to the general size of objects being referred to, for example molecular scale.
25. A desirable outcome given up to gain another desirable outcome.
29. The imaginary line around which an object spins, or rotates. Earth rotates around an axis that runs straight through Earth from the North Pole to the South Pole.
30. The ability to cause objects to change, move, or work.
31. A flat two-dimensional plane where a space object is at any point in its orbit.
36. A collection of stars and their solar systems that are gravitationally bound to one another.
37. A curved path that a space object takes around a star, planet, or moon.
38. A unit of force in the metric system, equal to 1 kg•m/s2.
40. The mixture of gases (“air”) that surrounds a planet.
41. A unit of length in the metric system; 1 meter is equal to 100 centimeters or 1,000 millimeters.
44. The amount of matter in an object.