Gravity and the Solar System
the force that attracts objects to the center of Earth or to the center of any other physical object with mass such as the Sun.
gravity
A space with absolutely no matter.
vacuum
The preserved remains, impression, or trace of a once living organism from the past.
fossil
the long-term patterns of conditions, such as sunlight, temperature, rainfall, or wind, for a region that have been recorded over long time periods (years to decades).
climate
a group of components that work together to carry out a function or job that the individual components cannot do on their own.
system
The forces caused by one surface or object rubbing against another as they move past each other.
friction
The top or peak of a wave.
crest
True or false: Older rocks are found closer to the surface.
the short-term atmospheric conditions, such as temperature, rainfall, or wind, that usually occur over days to months, and can change during a day, or from year to year.
weather
The thin layer of solid rock that forms the surface of Earth (both over and under oceans).
crust
In order for gravity to be noticeable, objects must be very __________________________
large
A measure of the distance from the rest position to the crest (or trough).
amplitude
Areas with ____________________ weathering and erosion are more likely to have fossils.
less
The amount of matter in a given volume
density
A machine that converts motion into electricity.
generator
The amount of gravity two objects have are determined by _____________________ and _______________________.
size and distance
The distance between one wave crest and the next, or any other similar point along the wave.
wavelength
Fossils are usually found in _____________________ rock.
sedimentary
The continuous and predictable movement of ocean water, caused by a number of factors such as density differences, wind, and the Coriolis effect.
ocean current
An interaction between organisms sharing a limited resource (such as food, water, and territory)
competition
1. initial force starts the object in motion
2. gravity pulls the object inward
3. lack of friction means the object doesn't slow down starts the object in motion
Why smaller objects orbit larger objects
As a sound or light wave travels away from a source, it __________ energy.
loses
Scientists can fill gaps in the fossil record by using fossil data, evidence, and information from ________________ places in the world.
other
When regions are at different temperatures, thermal energy will flow from the ____________ temperatures regions to the _________________ temperature regions.
warmer, cooler
A process where the atoms of reactant molecules are regrouped to form new, different molecules called products. The physical and chemical properties of the reactants and products will be different.
chemical change