Science and Math Homework

The one factor the experimenter changes during an experiment is called the_________.

• control

• dependent variable

• independent variable

• constant

In a controlled experiment, how many variables can be tested at a time?

• none

• one

• two

• three

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.

Tags

CCSS.HSS.IC.B.3

Benji 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 helicopter the same way

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

• Dropping from the same height

• Wing length

Tags

CCSS.HSS.IC.B.5

Benji 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 dependent variable?

• Dropping the helicopter the same way

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

• Dropping from the same height

• Wing length

Put the following decimals in order from LEAST to GREATEST.

• 0.2

• 0.025

• 0.25

• 0.3

Tags

CCSS.5.NBT.A.3

Marcos wants to know: Does the type of gasoline put in a car affect how fast the car can drive? What is the independent variable?

• speed of the car

• type of gasoline

• how much gas is put in the car

• the type of car

Tags

CCSS.HSS.IC.B.5

• 49.98

• 76.70

• 49.89

Tags

CCSS.5.NBT.B.7

Which of the following numbers are composite?
83  51  74  97  91

• 83, 97
• 83, 51, 91
• 51, 74, 91
• 74, 91

Round 57.973 to the nearest tenth.

• 57.9
• 57.97
• 58
• 58.1

Tags

CCSS.5.NBT.A.4