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Language
Investigations
Wisdom
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Research
100
a written step-by-step plan for an experiment
What is a procedure?
100
A student sets up an experiment to study if the mass of a sphere attached to a pendulum affects the length of time it swings. She labels two metallic spheres 1 and 2. Sphere 1 has a mass of 5 g, and sphere 2 has a mass of 10 g. She then attaches each sphere to a string, each of which is the same length, and ties each string to a fixed support. She releases both pendulum spheres from the same height and records the length of time they swing. Which portion of the experiment represents the independent variable? a. length of the string of the pendulum sphere b. mass of the pendulum sphere c. initial height of the pendulum sphere d. length of time for which the pendulum sphere swings
What is (b. mass of the pendulum sphere)
100
Computer modeling has improved the way meteorologists predict the weather. Is this technology the perfect solution for improving weather forecasting? a. Yes. It predicts weather for months in advance with high accuracy. b. No. It has increased the reliability of weather prediction but still makes mistakes. c. Yes. It predicts the temperature, but it is difficult to predict rain. d. No. It has decreased the reliability of hurricane prediction.
What is (No. It has increased the reliability of weather prediction but still makes mistakes.)
100
The Department of Wildlife, Fisheries, and Parks wants to add an area of land to the Natchez State Park. Before the department can do this, it has to survey all the species of plants, animals, and mushrooms that are found in the area plus the soil type, average precipitation, and temperature over a year. Which tool will the department use to measure the precipitation? a. meter stick b. barometer c. rain gauge d. anemometer
What is (c. rain gauge)
100
Peter wants to figure out which insects have 4 legs, 6 legs, and 8 legs. He decides to do this by A.trying to remember how many legs each type of insect has. B.making a model of an insect and counting the number of legs. C.performing experiments on several types of insect legs. D.collecting several types of insects and counting the number of legs.
What is (D.collecting several types of insects and counting the number of legs.)
200
facts and pieces of information
What is data?
200
Students are conducting an investigation to find out how meteor diameter affects the diameter of an impact crater. The students drop different diameter "clay meteors" into a large pan of flour from 3 meters in height, measured with a tape measure. What is the dependent variable in their experiment? a. drop height of clay meteor b. type of clay for meteor c. diameter of clay meteor d. diameter of impact crater
What is (d. diameter of impact crater)
200
A student wants to record the time it takes for 100 mL of water to boil. He fills a beaker with 100 mL of water, places a thermometer in it, and heats it on a hot plate. He records that the temperature of the water reaches 100°C at 8 min 25 s and concludes that 100 mL of water will always take more than 8 minutes to boil. Which statement best explains why the student’s conclusion is flawed? a. He used a very small volume of water. b. He did not record the initial temperature of the water. c. He supplied a small amount of heat to the water. d. He used a beaker to boil the water instead of a graduated cylinder.
What is (b. He did not record the initial temperature of the water.)
200
In Lei's experiment, one step of the procedure requires her to bring some water to a boil. Which two pieces of equipment should Lei use to carry out this step? A.a magnet and a petri dish B.a Bunsen burner and a balance C.a magnifying glass and a test tube D.a hot plate and a beaker
What is (D.a hot plate and a beaker)
200
Hanna hypothesizes that granite is denser than sandstone. How can Hanna test her hypothesis? A. Examine the rocks under a hand lens and determine which rock seems to have the largest particles. B. Melt each rock down inside a high-temperature furnace, and then measure the volume of the two liquefied rocks. C.Weigh each rock to determine which is the heaviest, and thus the densest. D.Measure the mass of the rocks with a balance and the volume of the rocks with water and a graduated cylinder. Then calculate their densities.
What is (D.Measure the mass of the rocks with a balance and the volume of the rocks with water and a graduated cylinder. Then calculate their densities.)
300
Forms of technology that have been modified to allow people with disabilities to perform functions that would have otherwise been difficult or impossible
What is adaptive technology?
300
A zoologist designed an experiment to determine how habitat size impacts the growth rate of fish. He used five fish tanks of different sizes filled with water and placed one black molly in each tank. All of the black mollies were the same size. The zoologist added the same amounts of food to each tank daily and measured the increase in length of each fish each week for a month. Which type of graph will best represent the results of the experiment? a. bar graph b. line graph c. pie chart d. scatter plot
What is (a. bar graph )
300
A student is studying the effect of the color of light on the rate of photosynthesis. He makes 3 test groups each with 10 geranium plants. He exposes the first group to red light, the second group to blue light, and the third group to green light. The student observes that the rate of photosynthesis is the highest in red light. What should the student do to validate the results of his experiment? a. Repeat the experiment at different temperatures. b. Repeat the experiment with the same conditions. c. Repeat the experiment using normal sunlight. d. Repeat the experiment with fewer plants in each group.
What is (b. Repeat the experiment with the same conditions.)
300
What type of graph is best for displaying percentages or parts of a whole?
What is a circle graph?
300
Katy has to do a science project that involves making a model. Which of the following questions would she answer with a model? A.Which type of bug can move the fastest? B.How fast can different plant species grow? C.What type of tree is the prettiest? D.How does a volcano's lava flow affect the plants and objects in its path?
What is (D.How does a volcano's lava flow affect the plants and objects in its path?)
400
a series of steps that scientists use as a guide for solving a problem or answering a question
What is the scientific method?
400
A student performed an experiment to determine how earthworms react in response to white light and darkness in moist conditions by filling two beakers with mud and placing five earthworms in each beaker. The student then placed one beaker outside and placed the other in a closet. What type of evidence would support a conclusion drawn by the student? a. a calculation b. an estimation c. an inference d. an observation
What is (d. an observation)
400
Some of the most powerful computers in the world are available to help predict weather phenomena such as hurricanes. Why can forecasting the track of a hurricane only a few days away be off by hundreds of miles? a. Hurricanes are so large that they are not significantly affected by other weather systems, making their paths difficult to anticipate. b. Hurricanes are large high pressure weather systems, so path projections are only significantly off when they will encounter other high pressure systems. c. Hurricanes are extremely large weather systems, affected by a tremendous number of variables, making exact predictions of their path difficult. d. Hurricanes only interact with bodies of water and not landmasses, making traditional methods of weather forecasting difficult.
What is (c. Hurricanes are extremely large weather systems, affected by a tremendous number of variables, making exact predictions of their path difficult.)
400
Juan wants to find out what the crystal structure of a salt grain looks like. What tool should he use in his investigation?
What is a hand lens or microscope?
400
Why is it important that a scientist keep accurate records of an experiment he conducts? A.in order to back up the conclusions he publishes as a result of the experiment B.in order to keep an accurate record of how many hours he spent in the lab C.in order to receive a patent for any new product that he invents D.in order to reminisce over all his experiments after he retires
What is (A.in order to back up the conclusions he publishes as a result of the experiment)
500
the factor that you deliberately change in an experiment
What is independent variable?
500
Mike wanted to investigate which insect repellent was most effective against cockroaches. He took 4 shoe boxes of the same size and cut a hole in each for the cockroaches to escape. Mike placed 15 cockroaches in each of the boxes and added 20 mL of an insect repellent to the corner opposite of the escape hole in 3 of the boxes, leaving 1 without repellent. After 1 hour, he counted the number of cockroaches remaining in each box and observed that box 3 had no cockroaches. What should Mike do to validate the results of the experiment? a. repeat the experiment b. introduce a control group c. test the effect on other insects d.use a wider variety of insect repellents
What is (d.use a wider variety of insect repellents)
500
Which of the following questions would be answered by performing a scientific experiment? A. How many types of food are available? B. What type of food looks the best? C. What type of food is the most enjoyable? D. What type of food is the most nutritious?
What is (D. What type of food is the most nutritious?)
500
Trisha is learning how to do a first-aid procedure known as CPR. She is practicing using a mannequin, or a model of the top half of the human body. What is one limitation of a CPR mannequin? A.It is not possible to lay a CPR mannequin on the floor. B.It is not possible to check for a real pulse on a CPR mannequin. C.It is not possible to breathe into the mouth a CPR mannequin. D.It is not possible to press down on the chest of a CPR mannequin.
What is (B.It is not possible to check for a real pulse on a CPR mannequin.)
500
George is interested in insects and wants to do an experiment. Which of the following is a scientific question about insects that he could investigate with an experiment? A.Do ants feel anxiety? B.Do different food types affect the growth rate of beetles? C.Are ladybugs prettier than beetles? D. Why are there so many different kinds of insects in the world?
What is (B.Do different food types affect the growth rate of beetles?)