Magnets and Property Changes
Vivan is playing with a magnetic toy train. On each end of the train car is a tiny magnet so the train cars can connect to each other.
What information about magnets will help Vivan position the next train car so that they will connect to each other?
Vivan needs to know which way the poles are facing.
Opposite poles attract. For example, the South pole of another train car will attract to the North pole of the car.
Which physical property of a car’s tires change by testing the amount of air pressure?
A. The color changed when the air pressure changed.
B. The ability to attract magnets changed when the air pressure changed.
C. The mass and volume changed when more air was added to the tire.
D. The state of matter of the air inside the tires changed into a liquid.
C. The mass and volume changed when more air was added to the tire.
Which statement is an inference?
A. The log was pushed the least distance by the 10 gallons of water.
B. 30 gallons of water moved the log 49 – 55 meters.
C. 30 gallons of water moved the log the farthest distance.
D. You should use more water to move the logs farther.
D. You should use more water to move the logs farther.
Evelyn threw a magnet into a backpack. When Evelyn got home and took the magnet out, there were objects attracted to the magnet. What objects would Evelyn likely find attracted to the magnet?
Examples: (Anything with iron, nickel, or cobalt)
iron paperclip, nickel hair clips, steel toy car
Ms. Fields is packing a moving van with boxes of books from the school book fair. Ms. Fields tells the crew to bring the boxes that take up the most space. How should the crew determine which boxes to bring to Ms. Fields?
They need to use a tape measure to find the volume.
Mrs. Long’s class was investigating the speed of a toy car over different surfaces. Mrs. Long placed the same toy car on the top of the same ramp and each group placed a different size and type of rug at the bottom. The group then measured the time it took for the car to travel the length of the rug.
After collecting their data, the groups discovered their data looked very different. What is one reason the groups had different data?
Each group used a different length rug to collect their data.
Ethan went to the grocery store and bought fruit. All the fruit was placed in a bowl on the counter. After a week Ethan examined the fruit and noticed a change had taken place. What change did Ethan observe?
The fruit decayed, resulting in other materials with new characteristics being formed.
Ethan and Cshammal race a car down a straight track. They want to determine if the air pressure of the tires affects the speed the car will go. They keep the same tires on the car but change the amount of air pressure. They collect data on the speed of the race car on the 1/8 mile track. What evidence can Ethan and Cshammal use to determine the tire pressure that gave the car the greatest speed?
Since the distance is the same, they will need to compare the time it takes to get to the end of the track for each tire pressure. The fastest times (smallest numbers) will have the greatest speed.
Which statement is an inference based on data?
Longer boats travel further when powered by wind.
Longer boats are better to build when using wind power.
Longer boats are better to build when using wind power.
Amy recorded several observations of changes to the steel wool in vinegar: The steel wool changed from silver to a reddish-brown color, the texture of the steel wool changed to dry and pieces came off when it was touched, and the odor of the steel wool changed.
What change did Amy observe with the steel wool in the vinegar?
The steel wool rusted when it got wet with vinegar.
This is a chemical change.
Ms. Harrelson's students took their s'mores outside and placed them in a solar cooker. The chocolate bar changed states of matter. What would the students expect to notice about the mass of their s’more now?
The mass of the cooked s’more is the same as the mass of the sum of the parts.
Which of Amy’s statements is an inference based on her observations?
A. Keeping the steel wool in oil will prevent it from rusting.
B. All the liquids and steel wool started at the same temperature.
C. The steel wool in the oil did not show a temperature change.
D. The steel wool in vinegar had a greater temperature change than the steel wool and water.
A. Keeping the steel wool in oil will prevent it from rusting.
Ms. Beede observed the terrarium in the Sun after a week and observed water appeared to have gathered on the inside of the plastic covering. What different forms of water are present in the terrarium?
Liquid water in the soil, water vapor in the air, no solid water present.
Klayton and Mikael found the mass of each material in their terrarium and recorded the mass of their closed ecosystem terrarium after five days. What would they expect the mass of the enclosed terrarium to be?
The mass of the enclosed terrarium will be equal to the mass of the sum of the parts.
Klayton claimed that the soccer team should order lighter color jerseys because they would feel less hot when playing. What is the best way Klayton should collect evidence to explain his claim?
A. Klayton should read about the different color fabrics.
B. Klayton should conduct an investigation using a thermometer and different colors of jerseys in the Sun.
C. Klayton should create a model and put the jersey on the model.
D. Klayton should conduct an investigation and feel the different colors of jerseys in the Sun.
B. Klayton should conduct an investigation using a thermometer and different colors of jerseys in the Sun.