1st Six Weeks Science Study Guide Review

recorded temperatures A student wants to determine if different colored boxes produce the same temperature as a white box. The student places white, blue, and red boxes of the same size in the sunlight. A thermometer is placed inside each box. The student observes and records the temperatures in the boxes throughout the day.  Which is the dependent variable in this investigation?

the water movement in the tank  Students set up an experiment to investigate how temperature differences in water create currents. The students fill three identical tanks with the same amount of 20ºC water. They put identical heaters in each tank. In the first tank, the heater is set to 20ºC. In the second tank, the heater is set to 30ºC. In the third tank, the heater is set to 40ºC. The student then places drops of dye in the tanks to observe the water movement.  Which of these is the dependent variable in the experiment?

graduated cylinder  A student heats different volumes of water in glass beakers and times how long it takes for the water temperatures to return to room temperature. Which tool should be used to measure the volume of the water?

asking a question  What is the first step of a scientific investigation?

The dark-colored socks absorbed more solar energy.

Yearly rainfall amounts decreased every year between 2006 and 2010.

identifying a problem or need  What is the first step in the technological engineering design process?

test the strength of the bridge  A bridge that crosses a small river was damaged by a flood. After engineers repair the bridge, which engineering procedure should be performed next?

listen for a loud sound produced by the buzzer  A student conducts an investigation that uses a simple electrical circuit connected to a loud buzzer.  Which test will best determine if the connection of the electrical circuit to the loud buzzer is successful?

the engineering design process.  The process of developing new technology is

People can get repetitive- motion injuries from too much text messaging  Using cell phones to send text messages is a quick and inexpensive way for people to communicate.  Which is a possible risk (unintended negative consequence) for this technology?

Fewer bulbs will be disposed of in landfills.  New fluorescent bulbs use less electrical energy and last longer than traditional incandescent bulbs.  What is a benefit of this technological advance?

giving the rice a greater nutritional value  Scientists want to make rice healthier for humans. The scientists insert a gene found in bean plants into rice plants. The inserted gene increases the iron content of the rice.  What is an intended benefit of this technology?

Cars generate air pollution.  Which of the following is a negative unintended consequence of the automobile?

develop technologies.  Engineering uses scientific knowledge to

a computer that can be operated by voice instead of by typing on a keyboard for a paralyzed person  Which is the best example of an adaptive bioengineered product?

doorbells that flash a light when activated for someone who is deaf  Which is the best example of adaptive biotechnology?

a computer-controlled laser that reshapes the lens in a person’s eye, because it causes permanent changes  Which is the best example of adaptive engineering and why?

an artificial heart  What example have we discussed is an example of an adaptive bioengineered product?

Study your notes. Read over them at least 7 times before the test.