Chemistry
H2O contains one _____
a. hydrogen atom
b. oxygen atom
c. element
d. atom
b. hydrogen atom
Increasing the wave speed means you are increasing the _________ of a wave.
a. wavelength
b. amplitude
c. frequency
d. energy
c. frequency
Who defined the large super-continent?
What is name for the super-continent?
a. North America
b. Pangaea
c. Africa
d. The Ring of Fire
b. Pangaea
A mutation to an organism's DNA will always result in an adaptation.
b. false
Select all of the following events in which a chemical change occurs.
a. Chocolate syrup dissolves into warm milk.
b. Toast is lightly charred in a toaster.
c. A piece of paper is cut up into 12 pieces.
d. Two unknown liquids are mixed together and a gas is produced.
e. Sugar is heated until it turns into a brown caramel sauce.
f. A sugar cube dissolves in coffee.
b. Toast is lightly charred in a toaster.
d. Two unknown liquids are mixed together and a gas is produced.
e. Sugar is heated until it turns into a brown caramel sauce.
What is NOT being transferred with a wave?
a. matter
b. wavelength
c. amplitude
d. Frequency
a. matter
What is molten rock under the ground?
a. lava
b. magma
c. transform
d. sand
b. magma
What theory explains how the plates of the Earth are continually moving?
a. The Continental Drift Theory
b. The Theory of Evolution
c. The Plate Tectonic Theory
d. The Big Bang Theory
c. The Plate Tectonic Theory
Individuals in a population that have traits or abilities that give them a competitive advantage over other population members are more likely to survive and reproduce. This principle is called
Natural Selection
Which statement is not a description of a chemical reaction?
a. A solid is dropped into a beaker of liquid and a gas is released.
b. Two liquids are mixed in a beaker and a solid forms at the bottom of the beaker.
c. A solid is dropped into a beaker of liquid and an explosion occurs.
d. A liquid is heated on a Bunsen burner and its temperature rises.
d. A liquid is heated on a Bunsen burner and its temperature rises.
What is the unit for frequency?
a. meters
b. Hertz
c. decibels
d. meters/second
b. Hertz
Which of the following is the best evidence that Earth's continents were once in vastly different positions than they are today?
a. Penguins are found only in the Southern hemisphere.
b. Fossils of tropical plants are found in Antarctica.
c. Volcanoes encircle the Pacific Ocean.
d. Major rivers form deltas from continental erosion.
b. Fossils of tropical plants are found in Antarctica.
Identical rock types, identical fossils, and very similar mountain ranges are found on different continents that are separated by a wide ocean. Which of these best explains these observations?
a. Organisms traveled between these continents on land bridges.
b. The same forces erode mountains in different locations.
c. These continents were joined together at one time in the past.
d. Some rock types are very common and are found everywhere.
c. These continents were joined together at one time in the past.
A trait that helps an organism to survive and reproduce is called a(n)
Which of the following chemical reactions is balanced to correctly demonstrate the conservation of mass?
What causes the refraction of a wave?
a. the density of the medium changes the speed
b. the amount of the medium changes the direction
c. the color of the medium changes the speed
d. the type of wave changes the direction
a. the density of the medium changes the speed
Subduction is when one plate goes under another plate. What causes this plate to go under the other plate?
a. it is less dense than the top plate
b. it is more dense than the top plate
c. the plates are part of the Ring of Fire
d. volcanoes forced the magma to go underneath
b. it is more dense than the top plate
Which events are most common along tectonic plate boundaries
a. erosion and earthquakes
b. hurricanes and tsunamis
c. earthquakes and volcanoes
d. tidal waves and volcanoes
c. earthquakes and volcanoes
Changes in DNA are known as mutations and can sometimes produce beneficial changes in populations. A mutant form of the normally light-colored peppered moth is dark-colored. The dark-colored moth blends in with soot-covered trees in heavily polluted areas. Why would the dark-colored mutation be beneficial in a polluted area?
b. They cannot be seen as well by predators.
Which three of the following best describes what happens in a nuclear reaction?
Objects appear different in size and shape in a container of water due to
a. refraction of the light waves.
b. interference of the water and light waves.
c. polarization of the light waves.
d. diffraction of the light waves.
a. refraction of the light waves.
Mark is graphing data collected from satellite images. He notices that a rift valley in the Red Sea keeps getting larger. What type of plate boundary is he mapping?
a. transform boundary
b. convergent boundary
c. divergent boundary
d. collision boundary
c. divergent boundary
What landform forms at convergent ocean plate boundaries?
a. ridges
b. trenches
c. valleys
d. mountains
b. trenches
What can be used as evidence for evolution? (select all that apply)