When testing how quickly two different laundry detergents remove stains, all conditions except the type of detergent should remain unchanged. These unchanged conditions are known as _____________________________.

• Constants

• Variables

• Controls

• Solvents

Tags

NGSS.MS-PS2-2

When a scientist analyzes the results of an experiment, what is the final step to determine if the hypothesis was correct?

• Drawing a conclusion

• Making a prediction

• Identifying a variable

• Designing a procedure

Tags

NGSS.MS-LS1-5

After noticing that bananas turn brown when exposed to air, a scientist forms a(n) ____________________________ to determine if covering them with plastic wrap will slow the browning process.

• Hypothesis

• Observation

• Theory

• Conclusion

Tags

NGSS.MS-LS1-5

When testing how sugar affects the boiling point of water, the boiling point is the ____________________________ variable that is observed.

• Dependent

• Independent

• Controlled

• Extraneous

Identify the independent variable and dependent variable. A researcher wants to find out if changing the temperature of water affects how quickly yeast produces gas to blow up a balloon.

• Independent Variable: Temperature of water, Dependent Variable: Time for yeast to inflate the balloon

• Independent Variable: Time for yeast to inflate the balloon, Dependent Variable: Temperature of water

• Independent Variable: Yeast type, Dependent Variable: Temperature of water

• Independent Variable: Balloon size, Dependent Variable: Yeast type

Tags

NGSS.MS-PS1-4

Identify the independent and dependent variable. A student wants to find out if using warmer water will dissolve a sugar cube faster.

• a. Independent Variable: Temperature of water b. Dependent Variable: Time to dissolve sugar cube

• a. Independent Variable: Size of sugar cube b. Dependent Variable: Temperature of water

• a. Independent Variable: Amount of sugar b. Dependent Variable: Temperature of water

• a. Independent Variable: Time to dissolve sugar cube b. Dependent Variable: Temperature of water

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Use the diagram to match each label to the correct atomic particle indicated by the arrows.

• a. Electron
  b. Neutron
  c. Proton

• a. Proton
  b. Electron
  c. Neutron

• a. Neutron

  b. Proton
  c. Electron

• a. Proton
  b. Neutron
  c. Electron

Tags

NGSS.MS-PS1-1

Which of the following correctly matches each subatomic particle with its electric charge?

• 1. Proton: Positive (+)
  2. Neutron: Neutral (0)
  3. Electron: Negative (-)

• 1. Proton: Neutral (0)
  2. Neutron: Negative (-)
  3. Electron: Positive (+)

• 1. Proton: Negative (-)
  2. Neutron: Positive (+)
  3. Electron: Neutral (0)

• 1. Proton: Positive (+)
  2. Neutron: Negative (-)
  3. Electron: Neutral (0)

Reading an Element box (refer to the element box diagram): Atomic number of the element ________________________

• 6

• 12

• 8

• 16

Tags

NGSS.MS-PS1-1

Reading an Element box (refer to the element box diagram): Atomic Symbol ________________________

• C

• O

• Na

• Fe

Tags

NGSS.MS-PS1-1