Fossils
What are the preserved remains or traces of organisms that lived in the past?
fossils
When a light wave hits a surface, part of the wave bounces back in a process called ...
reflection
What is the process by which all the different kinds of organisms have changed over long periods of time?
evolution
The constant downward acceleration of a falling body demonstrates what kind of force?
gravity
What is the movement of rock particles by ice, wind, or gravity called?
erosion
What is a hollow area in sediment that is in the shape of an organism?
a mold
Refraction is the bending of light waves. What causes light waves to bend?
a change in speed
What term describes the pattern of evolutionary change that takes place slowly and steadily over long periods of time?
gradualism
Imagine an object at rest. If two forces push on the object in the same direction, what must be true about the motion of the object?
the object must accelerate in the direction of the forces
Metamorphic rock changes to igneous rock by first going through which process?
melting
In which kind of rock do most fossils form?
sedimentary
Why does a red tomato appear red?
it reflects red wavelength of light
What is 'individuals that are better adapted to their environment survive and reproduce?
natural selection
What determines the strength of the gravitational attraction between two objects?
distance and mass
According to the theory of plate tectonics, what makes Earth's plates move?
convection currents in the mantle
What is the record of life forms and geologic events in Earth's history?
The Geologic Time Scale
A sound wave is an example of a mechanical wave because a sound wave requires...
a medium through which to travel.
Darwin's theory of evolution by natural selection explains which of the following?
a. the fossil record
b. the origin of life on Earth
c. the similarity of living things
d. the characteristics of organisms Darwin saw on the island of Madagascar
a. the fossil record
When you are riding in a car and the car stops suddenly, you continue to move forward because of ...
inertia
Mechanical weathering in which exposed rock surfaces are worn away by the grinding action of other rock particles carried by wind, water, or ice is called:
a. erosion
b. cracking and peeling
c. abrasion
d. frost wedging
c. abrasion
How did the first organisms that lived on Earth affect the Earth's atmosphere?
they increased the amount of oxygen in Earth's atmosphere
What waves carry information from the antenna of a broadcasting station to the receiving antennae on your radio?
radio waves
By the end of the last ice age, about 10,000 years ago, humans had migrated to every continent except Antarctica. During which period of the Cenozoic Era did the ice age occur?
a. Jurassic Period
b. Devonian Period
c. Tertiary Period
d. Quaternary Period
What 2 forces determine if an object floats or sinks?
weight and buoyant
Marble is a rock that forms deep in Earth. Which type of rock is marble?
metamorphic