2023 Midterm Review

The one factor that a scientist changes during an experiment.

• Controlled Variable

• Dependent Variable

• Independent Variable

The variable that is measured.

• Controlled Variable

• Dependent Variable

• Independent Variable

Why is it important to have only one independent variable and to control the other variables when performing science experiments?

• So you can tell which factor is causing the change in the experiment.

• It does not matter, you can have as many independent variables as you want.

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the independent variable?

• Dropping the same way

• Wing Length

• Amount of time it takes the helicopter to hit the floor

• Dropping from the same height

Tags

NGSS.MS-PS2-2

Enzyme

• proteins that speed up chemical reactions

• Changing substances by breaking and forming bonds (includes hydrolysis and dehydration reactions)

• the capacity for doing work

• the energy needed to start a chemical reaction

Tags

NGSS.HS-PS1-5

Which suffix (word ending) is used in the names of most enzymes?

• -ase

• -in

• -ine

• -ose

What is the optimum temperature for this enzyme?

• 20 degrees Celsius

• 45 degrees Celsius

• 52 degrees Celsius

• 64 degrees Celsius

Letter D...

• enzyme

• active site

• substrate

• products

Letter C...

• products

• substrate

• enzymes

• active site

Which of the following is not one of the four major classes of macromolecules?

• Lipids

• Carbon

• Protein

• Carbohydrates

• Nucleic Acid