A group of students wanted to compare the distances a toy car travels after leaving ramps of different heights. What tool would provide the most useful information for their comparison?

Students are investigating motion with a rubber band car. They want to know how the number of winds of the rubber band affects how the car moves. They will record the number of winds of the rubber band. What other data will they need to collect?

Some students wanted to find out if a tennis ball and a baseball dropped from the same height hit the ground at the same time. This investigation tests the effect of which of the following?

Students conducted an investigation where they measured the distance a toy car traveled after rolling down a ramp covered with sandpaper or wax paper. Which of these questions can the students answer by analyzing the results of their investigation?

Which two tools below would be most useful in testing how the mass of an object can affect the distance it moves after being pushed?

If a student has two magnets, how might it be determined which magnet is stronger?

Students conducted an investigation in which they rolled a soda can down a ramp that was 30 cm high and one that was 40 cm high. Which question were the students most likely trying to answer?

A push or a pull

A force of attraction to objects with iron or steel (also nickle and cobalt)

Force that pulls things down to Earth

Force created by rubbing against an object

Movement over a distance in a given time

What a scientist changes in an investigation-

What a scientist measures in an investigation-

What a scientist keeps the same in an investigation-

In an good experiment an scientist can change MORE than one variable.

In an good experiment an scientist can change ONLY one variable.

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