Unit 1 Practice Test: Scientific Inquiry/EDP

A student fills identical containers with the same amount of different liquids and places them into a freezer. She checks them every 2 minutes and discovers that the orange juice is the last to freeze and the water is the first to freeze. The IV is

• amount of liquid

• type of liquid

• time to freeze

• type and size of container

• temperature of freezer

Pick TWO observations that are QUANTITATIVE .

• The plant is 25 cm tall.

• The leaves on the plant are green.

• The temperature outside is hot.

• The car rolled down the ramp in 0.043 seconds.

Pick TWO observations that are QUALITATIVE.

• the solutiom heated to 119ºC

• bubbles appeared during the reaction

• the diameter of the crater was 115 km

• the precipitate was yellow

In an experiment, it is important to repeat or conduct multiple trials (3 or more) in order to

• use up all the materials

• make sure errors are not made during data collection

• use up the entire class period

• heve less materials to clean up

Why is it important to have all variables in an experiment the same EXCEPT for one (the IV)?

• to know which variable caused the result to happen

• to know which variable caused a change in the DV

• to know which variable caused the results to be different in each testing group

• ALL OF THESE COULD BE THE ANSWER

In engineering, the design process begins when a design engineer

• gathers information about an existing product

• comes up with multiple ideas for a new product

• recognizes that there is a problem that needs a solution

A team of engineers is asked to design a bristle brush for less than $5. They determine that the only way to manufacture the brush for this price is to use a cheaper plastic called polypropylene. What is the team's CONSTRAINT?

• the brush must be made out of polypropylene plastic

• the brush must cost less than $5 to manufacture

• the brush must be designed with bristles

A ____ is used to test different aspects of a product before the design is finalized. A _____ is used to demonstrate or explain how a product will look or function.

• model.........prototype

• prototype......model

• prototype......criteria

Engineers are designing a bridge. Some of the constraints that the engineers will consider are the time it takes to build the bridge, the cost of the construction of the bridge, and how many people will be using the bridge. Which of the following is also a very important CONSTRAINT that the engineers would need to consider?

• the pollution levels in the river

• the types of plant life living in the river

• the population of fish in the river

• the erosion of the river

You are working as an engineer at a company that produces "Koolaide Jammer" pouches. You find out that one of the pouches created contains a chemical that can be harmful. What should you do?

• Tell your boss so that the koolaide jammers can be removed from the stores and customers can get back their money.

• Change the name of the packaging of the product so that no one will know its name.

• Test the koolaide jammers on people to see if they get sick.

• Sell the koolaide jammers that are already on the shelves, but do not make any new ones.