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Matthew Davidson
Questions (47)
What type of chemical reaction occurs when the body digests fats and sugars that supply it with energy?
Responses endothermic
An unknown substance with a mass of 56.5 grams is placed in a graduated cylinder.
What is the identity of the unknown substance?
A jet plane is moving at a constant velocity on a flat surface. Select all of the forces that act against the forward motion of
In some lakes, excessive blooms of algae appear when human activity causes degradation of water quality resulting in conditions
Gaseous sulfur dioxide is a compound that combines with water in the atmosphere to form acid rain. What is the primary source of
Nonnative plants can take over areas that were once populated by native plant species.
Which abiotic process is least likely to
The figure below shows how nitrogen cycles within ocean waters. Each of the processes shown in bold is performed by living
When a rope is moved up and down between two people, a wave is formed.
The up and down movement of the rope from person to person
One limitation of using a food web as a model in representing an ecosystem is that they do not?
Responses include producers in
In order to observe the passing of a distant comet, which instrument would be the most helpful?
Responses Camera Camera Telescope
What is the best tool to use for growing bacterial cultures?
Responses a beaker a beaker a Petri dish a Petri dish a microscope a
During the Siberian summer, reindeer (herbivore) graze on young roots, fungi, grass, and other vegetation. In the cold winter
Which is the most important factor to consider when designing a kite to generate lift to keep it airborne?
Responses string
Use the following diagram to answer the question that follows.
When the simple machine shown lifts the load, the machine will
When manufacturing new parts for rocket engines, engineers must use materials that are durable and can withstand temperatures in
Data were collected during an investigation of copper metal. Which of the observations is an opinion?
Responses Observation 1
Which best describes the orbit of the Moon around Earth?
Responses circular with a period of about one month circular with a
In the centers of North America and Asia, large regions of land have relatively dry climates. This lack of rainfall results
What major and potentially catastrophic events can be predicted to occur in the Northern Hemisphere between the months of June
What major and potentially catastrophic events can be predicted to occur in the Northern Hemisphere between the months of June
When sugar is heated on a hot plate, it turns into a liquid. When the liquid sugar is cooled, a hard-crystalline substance is
Which is the correct order in the process of sedimentary rock formation?
Responses compaction, erosion, cementation, deposition
Scientists can identify an element by looking at the structure of a single
Responses atom. atom. neutron. neutron. molecule.
Which of these is a characteristic of the metal gold?
Responses malleable malleable lighter than water lighter than water
In an investigation, water in an Erlenmeyer flask is placed on a hot plate.
As the water is heated, the warmer, less dense water
When gasoline in a car engine is burned, only about 15 percent of the gasoline is converted into mechanical energy. This is
A worker needs to load a heavy box onto a truck. The worker uses a ramp to move the box because the ramp
Responses increases the
Which best explains what scientists are referring to when they use the term conservation?
Responses nonliving parts of the
When stratospheric ozone levels are reduced, the amount of ultraviolet radiation hitting Earth increases. Ozone depletion is
Which change in the environment would have a negative effect on the survival of a species in an ecosystem?
Responses increase in
Which shows structural organization from the simplest to the most complex?
Responses organisms → organ systems → cells →
The body is made up of many systems that interact with one another. For example, the skeletal system and the muscular system
A group of engineers has been hired to build a new style of bridge across the Mississippi River. Which method of investigation
A student collects data on three organisms and their interaction with each other in an ecosystem.
Which format is best for
Aerodynamics tests are performed on models of airplanes in wind tunnels before designs are put into production. Which of these
Prolonged exercise stimulates muscle cells to absorb sugar from the blood. This mechanism reduces stress placed on the body by
What precautions should be used in the lab when working with various chemicals?
Responses wear lab gloves and tie long hair back
Which statement best describes the primary role of perspiration in humans?
Responses Perspiration rids the body of excess water.
Water that evaporates from lakes and streams condenses into clouds and later falls as rain. The property of water that is
What causes a free falling object to accelerate?
Responses inertia inertia gravity gravity initial speed initial speed initial
John and Lisa collected a sample of ocean water and placed it in a jar. Within a couple of days, the water had evaporated and
During the Siberian summer, reindeer graze on young roots, fungi, grass, and other vegetation. In the cold winter months, they
The main disadvantage of using solar energy to generate electricity is that solar panels
Responses produce greenhouse gases.
Ellerbe, Luke
SCI8 Winter 24 Benchmark 4 of 454 of 45 Items Question
Which of these is required to support the theory of star formation?
Responses laws passed by the government laws passed by the
The statement “gold is more dense than lead” is
Responses a fact because most people agree. a fact because most people agree.
Which statement best explains why electromagnetism has become an accepted scientific theory?
Responses The theory predicts one of
Answers (1)
so which one is it
