Science Technology Review

A student wants to find out if changing the amount of light will affect the amount of bacteria that grows. What is the independent variable in his experiment?

• The amount of light

• The number of bacteria.

• The temperature

• The student

Tags

NGSS.MS-LS2-4

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Mrs. Soehner grew 2 plants with a two types of fertilizers. She found that Acme Fertilizer worked the best. How can she best verify her results?

• Repeat the experiment with 2 plants exactly as she did before.

• Repeat the experiment 4 more times using 2 plants each time.

• Repeat the experiment, but this time use 3 plants and change the amount of water they receive.

• Repeat the experiment and change the amount of sunlight and fertilizer.

Tags

NGSS.MS-ETS1-3

Mr. Johnson attended University of Wisconsin-Stevens Point. He hypothesized that the number of students increased from their Freshman to Senior Year.

Does the evidence support his hypothesis?

• No, because the number of students decreased from freshman to senior year.

• No, because the number of students did not change.

• Yes, because the number of students increased from freshman to senior year.

• Yes, because the students really enjoyed going to school and a number of students transferred to this school.

Marjorie drew a figure to illustrate Boyle’s law, which explains the relationship between pressure and volume for a gas kept at constant temperature. Her figure looked like the one shown.

Based on the figure, what happens to a gas due to pressure?

• The volume of gas increases as pressure decreases, as particles get closer together.

• The volume of gas decreases as pressure increases, as particles get closer together.

• The amount of gas increases as pressure decreases.

• The volume of gas remains constant as pressure increases.

Scientific knowledge changes over time. Scientists publish the new data and changes before it is accepted so that other scientists can...

• propose a change to the law.

• change the data.

• form an opinion

• debate the change

Tags

NGSS.MS-LS2-4

Which of these is a scientific law?

• The atom is made of charged particles.

• The universe is expanding due to movement of the celestial bodies.

• As pressure increases, temperature increases.

• All living things are made of cells.

Tags

NGSS.MS-LS1-1

Using the table, what is the percent of 11-12 year old youths who prefer either to get a job or play a sport?

• 22%

• 24%

• 46%

• 68%

I want to graph data that is change over time. What graph is best for this data?

• pie chart

• a line graph

• a scatter plot

• a double bar graph

Michael was investigating when most people were in his father's store. At what time does the store reach its maximum occupancy?

• 10 AM

• 1 PM

• 3 PM

• 6 PM

During which step of the engineering design process would a prototype most likely be created?

• testing and evaluting

• conducting research

• communicating the results

• identifying a problem

Tags

NGSS.MS-ETS1-4