Students design an experiment to determine how much force is needed to move blocks of wood of different masses slowly across a lab table. Which procedure should students include in their design?

The diagrams show two trials of an experiment in which a spring scale was used to measure force. This experiment can be used to determine —

A student designs an experiment to test the effect of the width of a piece of elastic on the elastic’s ability to stretch. The student selects four pieces of elastic with different widths but the same length. The student then attaches blocks with different masses to the pieces of elastic. The results of the student’s experiment are shown below. What should the student do to improve this experiment?

A student observes that the craters on the moon are different sizes. The student designs an experiment to study the formation of craters. The materials for the experiment are marbles and a pan of flour. The student makes a hypothesis that the size of the craters made on the surface of the flour will depend on the height from which the marble is dropped. Some of the steps in the student's experiment are described below. 1. Fill a round pan with flour 2. Smooth out the flour in the pan 3. 4. For each trial, measure the size of the crater formed and then smooth out the flour again Which of these is most likely Step 3 in the student's experiment?

A student uses a spring scale to pull a 50-gram block horizontally across a wood desk. Then the student pulls the block the same distance across surfaces of carpet, sandpaper, and glass.

What is force?

What is motion?

Which of the following is NOT a type of force?

If you slide a hockey puck on ice, it eventually stops because of:

A car is sitting at the top of a hill. What will cause the car to roll down the hill?

Which of the following would be attracted to a magnet?

You toss a baseball into the air. Gravity will make the ball -

What is a factor that is measured for change in an experiment?

What part of an experiment contains the data tables and graphs?

What are all the things that are kept the same in an experiment?

Maya designed an experiment to answer the following question: How does the amount of water given to a lima

bean seed affect how tall it grows?

In this experiment, what variable should Maya CHANGE?

Anthony designed an experiment to answer the following question: How does the temperature of water affect the time it takes for a sugar cube to dissolve?

What tool should Anthony use to measure how much time it takes for the sugar to dissolve?

Xavier’s team designed an experiment to answer the following question. How does the surface of a ramp affect how far a toy car rolls?

Which factor should Xavier change in the experiment?

What tool does Xavier need to measure how far the car goes each time?

Students conducted an experiment where they measured the distance a ping pong ball rolled down a ramp covered with carpet and silky cloth. Which of these questions can the students answer by analyzing the results of their experiment?

What is a PUSH or PULL of an object called?

The boy in Image B has a harder time getting down the hill because...

If Colten and Hassan are pulling with the same amount of force. What will happen?

In an experiment, how many variable can you change in one time?

While performing an experiment, it is important to:

Students used various temperatures of water to see which one dissolved candy faster.

What was the Independent Variable also known as the V?

An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the Result (R) is...

Jacob rolled a ball down 3 different ramps. What tool did he use to measure the distance traveled?

Materials that create this force are said to be magnetic and are called magnets.

In order for this rocket to leave earth, it needs to reach, something called, escape velocity. This force that pulls this rocket to earth is called...

A ball is kicked and rolls for a long distance across a field. Which force eventually causes the ball to slow and stop?

Alys stands at the top of a steep hill and pushes a ball over the edge with her foot. Which force causes the ball to continue rolling down the hill?

Levi's magnet will pick up all of these articles EXCEPT...

Which example has the most friction?

The data shown in Figure 1.2 might support which of these hypotheses?

Players from the Astros want to know who can throw a baseball the farthest. They mark off an area in the outfield to test their investigation. Which should they keep constant or stay the same, so they could have an accurate experiment?

In an experiment testing different surfaces, Hannah is using a ramp and toy car to find out how friction affects the distance traveled. She will use carpet, wood and sand paper. She will also use a height of 2 cm, 3 cm and 4 cm for the ramp. It resulted that the sand paper had the greatest amount of friction. Is this correct?

Niki has a bag of 12 cm rubber bands. She wanted to test their resistance. She grabbed one and applied a force of 10N. It snapped. She then concluded that all 12 cm rubber bands will snap when you apply a force of 10N. Is this a valid conclusion?

What is the independent variable or V on the graph (x-axis)?

What is the dependent variable or R on the graph (y-axis)?

A push or a pull

The unit of measurement for force

tool used to measure force in Newtons (N)

A rubbing force that opposes motion between two surfaces that are in contact. Rough surfaces have more friction and smooth surfaces have less friction

A force that PULLS objects toward each other

The force of attraction or repulsion of magnetic materials

change in position (movement)

frictional forces against the moving object

a scientific procedure or investigation to make a discovery

factors that can change in an experiment

the factor YOU changed in the experiment. Remember I changed

the factor that changed and was measured in the experiment. Remember Data

A testable prediction, what you think the results will be. If ......, then ............

steps by step instructions how to conduct an experiment

evidence; information gathered from observations

how your experiment is relevant to you and others.

Mrs. Gibson creates an experiment with different heights of ramps to see which height makes a toy car travel farther. What is the variable?

Students drop 4 different sized blocks into sand from different heights to see which height makes a larger dent in the sand. How can they improve this experiment?

Students roll toy cars down the same ramp with different coverings like carpet, foil, and sandpaper. What are they trying to test?

In order to test friction, what is needed for the investigation?

Would a spring scale measure more force pulling an object across carpet, wood, or sandpaper?

Students are pulling a spring scale across a table with a block of wood behind it. If they are testing the affect of friction on the force needed to pull the block, what should their variable be?

Two students wanted to find out which of their

toy race cars would go the farthest. They let each car roll down a ramp and then measured how far the cars rolled. Which of these should be held constant if they want a fair test of their cars?

Which question would best be answered with an experimental investigation?

A boy rides a skate board down a hill. Eventually the skate board stops. Which is most responsible for causing the skateboard to stop?

A book falls off the desk. What moves the book towards the floor?

Mark and Ann were playing kickball. They both kicked the same ball, but noticed that Mark kick made the ball travel farther than Ann's. What most likely caused the difference?

Bill and Max are pushing a box toward one another with equal force. What would happen if Bill stopped pushing?

A student uses a spring scale to pull a 50-gram block horizontally across a wood desk. Then the student pulls the block the same distance across surfaces of carpet, sandpaper, and glass. Which question is this investigation most likely designed to answer? (5.6D)

A student observes that the craters on the moon are different sizes. The student designs an experiment to study the formation of craters. The materials for the experiment are marbles and a pan of flour. The student makes a hypothesis that the size of the craters made on the surface of the flour will depend on the height from which the marble is dropped. Some of the steps in the student's experiment are described in the picture. Which of these is most likely Step 3 in the student's experiment? (5.6D)

A student designs an experiment to test the force of a spring using a spring launcher and four spheres with the same diameter but with different masses. What other piece of equipment would be most useful for this experiment? (5.6D)

A student designs an experiment to test the effects of the width of a piece of elastic on the elastic's ability to stretch. The student selects four pieces of elastic with different widths but the same length. The student then attaches blocks with different masses to the pieces of elastic. The results of the student's experiment are shown. What should the student do to improve this experiment? (5.6D)

Students drop the same heavy ball onto identical blocks of soft clay from different heights. For each height they measure the depth of the dent the ball makes in the clay. Why is depth of the dent different in each trial? (5.6D)

The diagrams show two trials of an experiment in which a spring scale was used to measure force. This experiment can be used to determine--- (5.6D)

Students design an experiment to determine how much force is needed to move blocks of wood of different masses slowly across a lab table. Which procedure should students include in their design? (5.6D)

Ruben slides a book across the floor. Eventually, the book will stop moving. What force causes the book to come to rest?

Valerie has an object that attracts objects made of iron or steel. What force does this object use to attract the objects?

A boy pulls upward on a box but cannot lift it. Which is the best explanation of why the boy cannot lift the box?

Amanda pushes a toy car to set it in motion. She determines the speed by measuring how far the car goes in 15 seconds. Which of these is most likely to increase the speed of the car?

A rock is balanced on the side of a grassy hill. A gentle push causes the rock to start rolling down the hill. What happens if the rock is pushed with more force?

Margie is bringing a box filled with books to her garage. She has to push very hard to move the box. Why is the box difficult to move?

Charlie hits two different golf balls with the same force. Which golf ball will go farthest?

Rob puts his dog in a wagon and pulls him around the block. What happens if he pulls a heavier dog with the same force?

Luis and Dan are both pushing on opposite sides of a box. The box is not moving. What must be true about the forces?

The two teams are pulling the rope in opposite directions, but the flag in the center is not moving. Why does the flag stay in the same spot?

Some students made different types of paper airplanes. They tested the planes to see which flew farthest. Why do the students need to do several repeated trials of the experiment before analyzing the results?

Anna is doing an experiment on friction. She measures the force needed to pull a toy car up a ramp. Then she attaches sandpaper to the ramp and measures the force needed to pull the car up. Next, she puts water on the ramp and measures. Finally, she puts oil on the ramp and measures. What is the control in Anna’s experiment?

Juan releases a toy car at the top of a ramp and measures how far it goes. He repeats this for ramps of different heights, then makes a graph to show his results. Which of these steps in a scientific method best describes what Juan is doing when he makes his graph?

Monica is conducting an experiment about force. She measures the force needed to pull a toy car carrying a rock up a ramp. Then she puts a piece of sandpaper on the ramp and measures again. She concludes that sandpaper increases the force of friction. Which piece of Monica’s data would provide evidence to support her conclusion?

Lauri is comparing the forces needed to push a ball across surfaces made of different materials. She compares the speed of the ball as it rolls across carpet, tile, and concrete. When she is done, her teacher asks two of her classmates to conduct the same experiment following Lauri’s procedures.

What is the best reason for other students to replicate this experiment?

The substance, object or group in an experiment that is not changed.

An experiment in which all variables are kept the same except for the one being tested.

A plan for how you will conduct an experiment

The extent to which an experiment, test, or investigation provides the same results on repeated trials.

An idea that can be tested by experiment or observation

A force that resists the motion of two surfaces sliding across one another

A force that pulls object toward each other

A force that pushes or pulls a magnetic material across a distance

Information describing what was learned from an investigation based on observations and collected data

A condition in an experiment that is changed in order to determine the effect of that change