Earth & Gravity Unit 1 Test Review Test 9/26
- 1.Scientists do many types of work. Their work often includes making field observations, conducting surveys, creating models, and carrying out experiments. Which description characterizes an experiment?
- A.
Observation of plants or animals in their natural environment
- B.
Physical or mathematical representation of an object or process
- C.
An organized procedure to study something under controlled conditions
- D.
Collection of data from the unregulated world for comparative purposes
- 2.Raul wants to investigate how the angle of a ramp affects the speed of an object rolling down the ramp. He can conduct his investigation in a number of different ways. Which investigation should he perform?
- A.
Observe different bicylists riding down hills of varying steepness
- B.
Perform an experiment in a lab in which the angle of the ramp is controlled and the speed of a rolling cart is measured
- C.
Record the time it takes one bicyclist ot ride down hills of varying
- D.
Observe video of various objects rolling down hills and estimate the angle of the hill and the speed of the object.
- 3.Lida fills two balloons with the same amount of air. Balloon 1 remains at room temperature. Lida places balloon 2 in the freezer. Balloon 2 (the one that went in the freezer) got smaller. Which statement is a law that describes the results of Lida's balloon experiment?
- A.
Decreasing the amount of a gas decreases its temperature.
- B.
The volume of a gas increases when the temperature decreases
- C.
The volume of a gas decreases when the temperature descreases
- D.
Decreasing temperature decreases the volume of a gas because the molecules slow down
- 4.Raul made a list of activites that are scientific and activites that are not scientific. Which actvity should Raul classify as not scientific?
- A.
Sorting rocks by color and size
- B.
Measureing the height of a plant every day
- C.
Climbing to the top of a very tall mountain
- D.
Making notes about how many hours the sun shines each day
- 5.Bryce observes that the sun always rises in the east. He talks with others and finds that everyone has the same observation. Which statement is a scientific law? (remember a scientific law is a describption of what happens not a reason or explanation)
- A.
If the sun appears in the east, then I am in the Western Hemisphere
- B.
Why does the sun rise in the east?
- C.
The sun appears in the east because of Earth's rotation pattern
- D.
The sun rises in the east
- 6.Scientists use different types of tools to investigate how and why things happen. Here are some examples of these tools.
- A diagram of a food chain in the Everglades
- A plastic replica of the human diegestive system
- a mathematical equation for finding the speed of an object
- A.
Models
- B.
Experiments
- C.
Observations
- D.
Hypothesis
- 7.Three different lab groups perform experiments to determine the density of the samples of iron. They have all rounded the density to the nearest whole number. Density = mass / volumegroup Mass of iron (g) Volume of iron (cm3) Denisty of rion (g/cm3)1 32 4 82 48 6 83 ? 5 8What is the mass of iron for group 3?
- A.
5 g
- B.
8 g
- C.
64 g
- D.
40 g
- 8.Shelby wants to make sure she understands the components of a good scientific investigation. She knows that it should be controlled and have a large sample size. Also, she thinks that the results should be commmunicated to other scientists. Which is another component that is necessary for a good investigation?
- A.
It must be conducted in a big lab
- B.
It must be run by a university scientist
- C.
It must be able to be replicated by other scientists
- D.
It must be done with expensive equipment
- 9.A friend who knows a lot about science reads in a book that a piece of black paper will get warmer in sunlight than a piece of white paper. Which of these is a scientific reaction to this information?
- A.
Accept the statement as true because your friend knows about science.
- B.
Design an experiment to show whether the statement is correct or incorrect.
- C.
Believe the statement because it is written ina book, so you can trust it to be true.
- D.
Tell your friend that the statement makes no sense because color does not affect temperature.
- 10.Bronson Tells Travis his theory about why sea turtles nest on the beach instead of in the ocean. he says "The turtle eggs would sink to the bottom of the ocean, and the baby turtles would drown." Bronson says his uncle, a fisherman, told Bronson this information. Travis tells Bronson that his theory is not scientific. Why does Bronson's idea not meet the requirements to be a scientific theory?
- A.
Bronson's idea is aleady a scientific law.
- B.
Bronson's idea is not supported by scientific evidence.
- C.
Bronson's idea is a good guess that can be tested by experiments.
- D.
Bronson and his uncle are not scientists.
- 11.Universtiy of Miami scientists developed a new type of wound dressing that keeps bacteria out of the wound. What is a conclusion that you can make from this information?
- A.
Scientific discoverises always lead to new technologies.
- B.
Scientists often respond ot the needs in our society.
- C.
Scientific advances are always made in the field of medicine.
- D.
Scientists may make discoveries that have no impact on society.
- 12.Which would be a good source of information
- A.
A publiciation that is 15 years old
- B.
A scientist who is trying to sell a new acne cream
- C.
Any place on google
- D.
A place that depends on its reputation - like a university site
- 13.Scientists that make contributions to scientific knowledge come from ...
- A.
Universities
- B.
Government agencies
- C.
All kinds of backgrounds and possess varied talents, interest, and goals.
- D.
Only people who take a lot of science classes
- 14.Scientists have to be creative in ...
- A.
Designing experiments
- B.
Explaining observations
- C.
Making up good stories to support their data
- D.
Both a and b
- 15.Science is different from other forms of studies because
- A.
They study the natural world and testable ideas
- B.
They do experiments
- C.
There is a lot of reading involved
- D.
Only certain people can be scientists
- 16.What are some types of scientific explanations?
- A.
Sales pitches
- B.
Unreplicated experiments
- C.
Theories, Models and Laws
- D.
Anything that you hear from a scientist who works at a university
- 17.What is a scientific theory?
- A.
Any hunch that you have.
- B.
A well supported explanation about the natural world.
- C.
The basis for the metric system
- D.
It is similar to a hypothesis that has not been tested.
- 18.Scientific laws are
- A.
A basic principle of nature that always occurs under certain conditions
- B.
Etternal and unchanging
- C.
The same as a law of society
- D.
Both a and b
- 19.The law of intertia, the law of gravity, the law of superpostion, and Boyle's law are all examples of
- A.
Scientific laws
- B.
Explain how solids react
- C.
Explain how liquids react
- D.
Models and theories
- 20.A good scientific theory can
- A.
Be as good as a hunch
- B.
Be talked about by many people
- C.
Change and adapt with new information
- D.
Be used to support a thesis
- 21.Why should scientific experiments be replicated?
- A.
So other people can ride your coat tails
- B.
For more money
- C.
To validate the findings; give it more support
- D.
They should not be replicated
- 22.What are some ways to confirm that an investigation is valid?
- A.
Peer review and replication
- B.
Checking for it in a publication
- C.
Checking the sell by date
- D.
Having others do the same expeirment
- 23.What is the first step of the scientific method?
- A.
Hypothesis
- B.
Research
- C.
Communicate results
- D.
Problem or questions
- 24.What is the 2nd part of the scientific method?
- A.
Problem or question
- B.
Research
- C.
Hypothesis
- D.
Communicate results
- 25.What is the 3rd part of the scientific method?
- A.
Hypothesis
- B.
Research
- C.
Plan and do an experiment
- D.
Analyze data
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