Science Procedures Quiz (Multiple Choice)

Which version is the most accurate and complete procedure?

• Put some salt in a container on the scale and record how much it weighs.

• Place a container on the scale, add salt until it reaches 5 grams, and then write it down.

• Tare the balance with a weigh boat, measure 5 g of salt, but don’t worry about exact decimal points.

• Place a weigh boat on the balance, zero it, add 5 g of salt using a scoopula, and record the mass to the nearest 0.01 g.

Which procedure shows the clearest and safest way to boil water in the lab?

• Boil water with the Bunsen burner.

• Use a ring stand and gauze to hold a beaker with 50 mL water, heat with a blue flame, and stop when boiling begins.

• Put water in a beaker and heat it until you see bubbles.

• Measure out some water, heat it carefully, and turn off the burner when it's hot.

Tags

NGSS.MS-PS3-3

Which is the best version of this procedure?

• Record the starting temperature of 100 mL water in a foam cup, add an Alka-Seltzer, and record temperature every 30 seconds for 3 minutes.

• Add Alka-Seltzer to water and see if the temperature changes.

• Measure and record the temperature before and after adding Alka-Seltzer to 100 mL of water.

• Put a thermometer in water, add the tablet, and write the temperature down a few times.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS3-4

Which of these procedures clearly shows how to test the pH of a solution?

• Use a strip of pH paper to test the solution and check the color.

• Dip a pH strip in 10 mL of lemon juice for 2 seconds, compare it to the color chart, and record the pH.

• Pour lemon juice into a beaker, dip in pH paper, and guess the pH based on color.

Which version is the most complete and clear?

• Mix equal parts of acid and base and record what happens.

• Measure 25 mL of 1.0 M HCl and add it slowly to 25 mL of 1.0 M NaOH in a beaker; stir and measure temperature change.

• Combine 25 mL of acid and 25 mL of base in a beaker and check the temperature at the end.

• Pour acid into a beaker, add some base, stir it, and see if the temperature changes.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which version is the most accurate way to measure the volume of a liquid?

• Use a ruler to measure the liquid in a beaker.

• Pour the liquid into any container and write down how much you think it is.

• Pour the liquid into a graduated cylinder, read the bottom of the meniscus at eye level, and record the volume.

• Use a cup to estimate the amount of liquid and record your result.

Which procedure best describes how to separate sand from saltwater?

• Pour the mixture into a cup and wait.

• Filter the mixture to collect the sand, then evaporate the water to get the salt.

• Put the mixture in the fridge until it separates.

• Use a spoon to scoop out the sand and salt separately.

Which is the best procedure for measuring temperature with a thermometer?

• Hold the thermometer in your hand to get the temperature.

• Place the thermometer in the substance and read the temperature at eye level once it stabilizes.

• Dip the thermometer quickly in and pull it out to read the value.

• Wave the thermometer near the surface of the substance.

How should you label a beaker containing a chemical?

• Write directly on the glass with a marker.

• Place a labeled piece of tape on the beaker with the substance name and concentration.

• Just remember what's in it.

• Label only the cap or lid.

Which is the most accurate way to time a chemical reaction?

• Estimate when it's done.

• Use a stopwatch and start timing when the first change is observed.

• Guess how long it takes and record that.

• Start the stopwatch and stop it randomly.