Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
PC Science S1 Vocab
PC Science Semester 1 Virtual Science Notebook Vocabulary
| Term | Definition |
|---|---|
| Force | a push or pull exerted on an object |
| Net Force | the overall force on an object when all individual forces acting on an object are added together |
| Unbalanced Forces | a nonzero net force that changes an object's motion |
| Balanced Forces | equal forces acting on an object in opposite direction |
| Gravity | the pulling force between objects |
| Friction | a force that opposes motion |
| Inertia | the tendency of a moving object to continue in a straight line or a stationary object to remain in place |
| Acceleration | a change of motion by an unbalanced force acting on an object |
| Direction | a straight path that an object can move along |
| Frame of Reference | a system that uses coordinates or background objects to establish position or to measure movement of a point of space |
| Mass | a measure of how much matter is present in a substance |
| Motion | the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time |
| Newtons | unit of measurement for force |
| Force Vector | a representation of a force that has both magnitude and direction |
| Speed | the rate of change in position (or distance traveled) with respect to time, speed (s) is distance (d) per time (t) or s=d/t. An example of speed is 3 meters per second. |
| Gravitational Force | the force that causes objects with mass to attract one another. Gravitational attraction depends on two things: mass and distance |
| Attractions | having the tendency to pull other objects toward itself |
| Weight | measure of the force of gravity on an object |
| Surface Friction | a force that one surface exerts on another when the two come in contact with each other. The force of friction depends on two things: types of surfaces, and how hard the surfaces are pushed together |
| Rolling Friction | friction that occurs when an object rolls over a surface |
| Sliding Friction | friction that occurs when one solid surface slides over another |
| Fluid Friction | friction that occurs as a object moves through a fluid (a gas or a liquid) |
| Air Resistance | the fluid friction experienced by objects falling through air |
| Free Fall | the motion of a falling object when the only force acting on it is gravity (9.8 m/s^2) |
| Terminal Velocity | the maximum velocity a falling object achieves |
| Static Friction | prevents objects from moving and is generally higher than the frictional force experienced by the same two objects when they are moving relative to each other |
| Tilt | the slant of earth's axis |
| Axis | the imaginary line that runs north to south |
| Cyclic Patterns | the process where it repeats itself |
| Eclipse | the line up of two objects that create a certain light |
| Lunar Eclipse | when a full moon passes earth's shadow, which makes the moon appear red |
| Lunar Phase | the shapes representing what phases the moon has seen from earth |
| Moon | the celestial body that revolves around a planet |
| Orbit | a curved path followed by a satellite as it revolves around an object |
| Seasons | the four divisions of the year based on temperature change due to the tilt of the earth |
| Solar Eclipse | when the moon passes between the Earth and the Sun |
| Solar System | the groups of planets and stars in space |
| Star | a mass that is made up of gas |
| Sun | a star that revolves around planets, made of hydrogen and helium |
| Inner Planets | the inner planets closest to the Sun are small and rocky: Mercury, Venus, Earth, and Mars |
| Asteroid Belt | a region of our solar system - between the orbits of Mars and Jupiter - in which many small bodies orbit our Sun |
| Outer Planets | the outer planets are the gas giants: Jupiter, Saturn, Uranus, and Neptune |
| Dwarf Planets | celestial bodies that orbit a star, but do not meet all the criteria for being a planet |
| Big Bang Theory | a theory that says the universe began as a small point that expanded rapidly about 13.7 billion years ago |
| Dust | tiny particles of matter floating in space; condense under gravity to form stars and planets |
| Gas | a state of matter with indefinite volume and shape |
| Galaxy | families of stars, gases, and space dust groups together in various clusters |
| Milky Way | our home galaxy, the Milky Way, is a spiral galaxy made from between 300-400 billion stars |
| Spiral Galaxy | these galaxies are shaped like discs with arms spiraling from a central bulge. The stars and other objects in a spiral galaxy revolve in the same direction around the galaxy's center, like a spinning pinwheel |
| Elliptical Galaxy | these galaxies look a bit like footballs (An ellipse is an oval) The stars and matter in an elliptical galaxy revolve around the galaxy's center in a variety of directions |
| Lenticular Galaxy | a galaxy that has flat, disc-like shapes. However, unlike spiral galaxies, they lack the distinctive arms that usually wrap themselves around the central bulge, and often have noticeable rings |
| Irregular Galaxy | galaxies that have shapes that are difficult to classify. Some are long and thin, like needles. Others are shaped like rings or clouds |
Created by:
Ms. Traynor-Grimes
Popular Science sets