Science

A biochemist is performing an experiment to determine the effects of chemical X on the growth of bacteria. Which test tube is the control?

• Test tube 1

• Test tube 4

• Test tube 2

• Test tube 3

Theodore wants to determine if a new diet medication will make rats lose weight. What is the Test or independent variable

• The diet medication

• The rats

• The amount of weight loss

• The food the rats eat

Tags

NGSS.MS-ETS1-1

Scientific methods are planned and organized, but are not rigid, step-by-step outlines to solve problems.

• True

• False

Tags

NGSS.MS-PS3-4

If the original hypothesis stated that the plant watered once per day would grow the most, what should the scientist do based on the data collected?

• Throw out the experiment since it didn’t match the hypothesis.

• Accept the hypothesis and explain how the evidence supports it.

• Retry the experiment until it matches the hypothesis

• Create two hypotheses and repeat the experiment so that both are correct.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Ashley conducts an investigation on the effects of water amounts for seed sprouting. How can Ashley determine if her results are replicable?

• Ashley can conduct her experiment with the large sample sizes.

• Ashley can perform the experiment multiple times

• Ashley can carefully record her observations.

• Ashley can ask other students to perform the experiment.

Indira tested whether a tomato plant grew faster in partial shade or full sun. The table below shows the height of each plant after 0, 10, 20, and 30 days. What is one conclusion Indira can draw from her data?

• Tomato plants need to be placed in full sun in order to grow

• The tomato plants grew taller in full sun than they did in part shade.

• All plants grow taller in full sun than they do in part shade.

• Tomato plants grown in full sun will produce more tomatoes.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

A scientist is performing an experiment to determine the melting point of a new substance. Which action could increase the likelihood of obtaining accurate results?

• Using three types of thermometers in the experiment

• Repeating the experiment multiple times

• Experimenting with multiple substances

• Writing out the procedure after the experiment

Tags

NGSS.MS-PS3-4

Two students are studying what makes ice melt fastest. They want to conduct an investigation. During which of these steps in their investigation will they measure the ice?

• collecting some data

• showing some graphs

• developing a hypothesis

• making a conclusion

Tags

NGSS.MS-PS3-4

A student hypothesized that the amount of sunlight a sunflower plant receives determines the number of sunflower seeds the plant produces. In her experiment, the number of seeds produced is the _____.

• Test or independent variable

• controlled variable

• Mix Variables

• Outcome or dependent variable

Two scientists get different results after doing the same experiment. which of the following should the scientist do next?

• Agree on whose experiment should be repeated

• Accept Each others results

• Repeat one scientist's experiment

• Repeat the experiment they both did