10 Integrated Practice and Exam Review Free Online FlashCards

What can a comparison show when other influences were not controlled?

A higher attendance rate was observed, but the comparison does not prove reminders caused the increase because other factors may have influenced attendance.

How much powder is in 200 mL if 600 mL contains 18 g?

At the same concentration, 200 mL is one-third of 600 mL, so it contains 6 g of powder.

Which organs primarily exchange oxygen and carbon dioxide between air and blood?

The lungs exchange oxygen and carbon dioxide between air and blood, especially across the alveolar surfaces.

Which verb agrees with the subject in “The list of supplies ___ on the desk”?

Use a singular verb: “The list of supplies is on the desk.” The subject is the singular noun “list,” not the nearby plural noun “supplies.”

How do you convert liters to milliliters?

Since 1 L equals 1,000 mL, multiply liters by 1,000. For example, 2.4 L equals 2,400 mL.

Solve $3x+7=25$.

Subtract 7 from both sides and divide by 3: $3x=18$, so $x=6$.

Which cell structure contains most of a human cell’s DNA?

Most DNA in a human cell is housed in the nucleus.

What is the purpose of a control group in an experiment?

A control group provides a comparison without the tested intervention, helping researchers assess the intervention’s effect.

If a researcher changes light amount and measures plant growth, what is the independent variable?

The amount of light is the independent variable because the researcher deliberately changes it.

What is osmosis?

Osmosis is the movement of water across a selectively permeable membrane.

How is a solution with a pH below 7 generally described?

A solution with a pH below 7 is generally acidic.

Which type of molecule is a major source of quick energy for cells?

Carbohydrates, such as glucose, are commonly used by cells as an energy source.