Science UIL General Science

You are instructed to obtain 10.0 grams of sodium chloride in order to complete a particular lab activity. You and your partner accidentally get 15.0 grams of sodium chloride. Which of the following would be the most correct response of what to do with the excess sodium chloride?

• place the excess in a plastic bag or beaker for use later

• pour the remainder back into the sodium chloride container

• go ahead and use the 15.0 grams instead of the 10.0 grams

• dispose of the excess as instructed by your teacher

Your lab instructor has given you directions to complete a lab. You decide to try the lab a different way and end up cutting your hand on a glass beaker. What should you do first?

• run cold water on your hand to stop the bleeding

• apply direct pressure to the cut to stop the bleeding

• inform your instructor

• ask to go to the bathroom and stop at the nurse's office on the way back to class

What should you consider when heating a test tube of a strong, basic solution you have been instructed to heat up by your teacher?

• Is the material in a test tube that is marked as safe to heat in direct flame?

• How long will the material take to heat?

• Why are you heating this up?

• What is the boiling point of the strong, basic solution?

Tags

NGSS.MS-PS1-4

Your lab asks you to measure 10.0 mL of a liquid to the nearest tenth of a millimeter. Your lab tool of choice for this task would be the ___.

• beaker

• test tube

• graduated cylinder

• spot plate

Select the one below that would not be essential to correctly measuring 45.0 grams of a solid for use in a lab activity.

• Tare the scale before use.

• Make sure the pan or balance tray is clean before weighing the solid.

• Use a weighing paper or weighing tray to keep the scale pan clean.

• Know the chemical formula for the material you are using.

Convert 181.7 centimeters to kilometers.

• .001817 km

• 18170000 km

• .01817 km

• 181700 km

There are ___ mm in 56.7 meters.

• 5670 mm

• 56700 mm

• .00567 mm

• 567 mm

You and your partner think you have come upon a cure for the common cold. You want to let everyone know that you discovered the cure. Before you publish your cure in the local newspaper, which step of the scientific method might you go over again?

• Research about the common cold

• Evaluate your hypothesis

• Experiment to test your hypothesis

• Formulate your hypothesis

As you heat water in a beaker, the longer you heat it, the hotter it gets. What is true concerning this experiment?

• temperature is the dependent variable

• time is the dependent variable

• temperature is the independent variable

• time is considered the control in my experiment

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4